Ubuntu update for linux

1) Use-after-free

EUVDB-ID: #VU77990

Risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-21255

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a local application to escalate privileges on the system.

The vulnerability exists due to insufficient validation of user-supplied input within the binder_transaction_buffer_release() function in Binder subsystem in Android kernel. A local application can trigger a use-after-fee error and execute arbitrary code with elevated privileges.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 22.04 - 23.04

linux-image-virtual-hwe-22.04 (Ubuntu package): before 6.2.0.32.32~22.04.9

linux-image-lowlatency-hwe-22.04 (Ubuntu package): before 6.2.0.1012.12~22.04.9

linux-image-lowlatency-64k-hwe-22.04 (Ubuntu package): before 6.2.0.1012.12~22.04.9

linux-image-generic-lpae-hwe-22.04 (Ubuntu package): before 6.2.0.32.32~22.04.9

linux-image-generic-hwe-22.04 (Ubuntu package): before 6.2.0.32.32~22.04.9

linux-image-generic-64k-hwe-22.04 (Ubuntu package): before 6.2.0.32.32~22.04.9

linux-image-virtual (Ubuntu package): before 6.2.0.32.32

linux-image-raspi-nolpae (Ubuntu package): before 6.2.0.1012.15

linux-image-raspi (Ubuntu package): before 6.2.0.1012.15

linux-image-lowlatency-64k (Ubuntu package): before 6.2.0.1012.12

linux-image-lowlatency (Ubuntu package): before 6.2.0.1012.12

linux-image-kvm (Ubuntu package): before 6.2.0.1012.12

linux-image-generic-lpae (Ubuntu package): before 6.2.0.32.32

linux-image-generic-64k (Ubuntu package): before 6.2.0.32.32

linux-image-generic (Ubuntu package): before 6.2.0.32.32

linux-image-aws (Ubuntu package): before 6.2.0.1011.12

linux-image-6.2.0-32-generic-lpae (Ubuntu package): before 6.2.0-32.32~22.04.1

linux-image-6.2.0-32-generic-64k (Ubuntu package): before 6.2.0-32.32~22.04.1

linux-image-6.2.0-32-generic (Ubuntu package): before 6.2.0-32.32~22.04.1

linux-image-6.2.0-1012-raspi (Ubuntu package): before 6.2.0-1012.14

linux-image-6.2.0-1012-lowlatency-64k (Ubuntu package): before 6.2.0-1012.12~22.04.1

linux-image-6.2.0-1012-lowlatency (Ubuntu package): before 6.2.0-1012.12~22.04.1

linux-image-6.2.0-1012-kvm (Ubuntu package): before 6.2.0-1012.12

linux-image-6.2.0-1011-aws (Ubuntu package): before 6.2.0-1011.11~22.04.1

CPE2.3

• cpe:2.3:o:canonical:ubuntu:23.04:*:*:*:*:*:*:
• cpe:2.3:o:canonical:ubuntu:22.04:*:*:*:*:*:*:

External links

http://ubuntu.com/security/notices/USN-6338-1

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) NULL pointer dereference

EUVDB-ID: #VU79476

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-2898

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error within the f2fs_write_end_io() function in fs/f2fs/data.c. A local user can pass specially crafted data to the system and perform a denial of service (DoS) attack.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 22.04 - 23.04

linux-image-virtual-hwe-22.04 (Ubuntu package): before 6.2.0.32.32~22.04.9

linux-image-lowlatency-hwe-22.04 (Ubuntu package): before 6.2.0.1012.12~22.04.9

linux-image-lowlatency-64k-hwe-22.04 (Ubuntu package): before 6.2.0.1012.12~22.04.9

linux-image-generic-lpae-hwe-22.04 (Ubuntu package): before 6.2.0.32.32~22.04.9

linux-image-generic-hwe-22.04 (Ubuntu package): before 6.2.0.32.32~22.04.9

linux-image-generic-64k-hwe-22.04 (Ubuntu package): before 6.2.0.32.32~22.04.9

linux-image-virtual (Ubuntu package): before 6.2.0.32.32

linux-image-raspi-nolpae (Ubuntu package): before 6.2.0.1012.15

linux-image-raspi (Ubuntu package): before 6.2.0.1012.15

linux-image-lowlatency-64k (Ubuntu package): before 6.2.0.1012.12

linux-image-lowlatency (Ubuntu package): before 6.2.0.1012.12

linux-image-kvm (Ubuntu package): before 6.2.0.1012.12

linux-image-generic-lpae (Ubuntu package): before 6.2.0.32.32

linux-image-generic-64k (Ubuntu package): before 6.2.0.32.32

linux-image-generic (Ubuntu package): before 6.2.0.32.32

linux-image-aws (Ubuntu package): before 6.2.0.1011.12

linux-image-6.2.0-32-generic-lpae (Ubuntu package): before 6.2.0-32.32~22.04.1

linux-image-6.2.0-32-generic-64k (Ubuntu package): before 6.2.0-32.32~22.04.1

linux-image-6.2.0-32-generic (Ubuntu package): before 6.2.0-32.32~22.04.1

linux-image-6.2.0-1012-raspi (Ubuntu package): before 6.2.0-1012.14

linux-image-6.2.0-1012-lowlatency-64k (Ubuntu package): before 6.2.0-1012.12~22.04.1

linux-image-6.2.0-1012-lowlatency (Ubuntu package): before 6.2.0-1012.12~22.04.1

linux-image-6.2.0-1012-kvm (Ubuntu package): before 6.2.0-1012.12

linux-image-6.2.0-1011-aws (Ubuntu package): before 6.2.0-1011.11~22.04.1

CPE2.3

• cpe:2.3:o:canonical:ubuntu:23.04:*:*:*:*:*:*:
• cpe:2.3:o:canonical:ubuntu:22.04:*:*:*:*:*:*:

External links

http://ubuntu.com/security/notices/USN-6338-1

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Deadlock

EUVDB-ID: #VU77246

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-31084

CWE-ID: CWE-833 - Deadlock

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to a deadlock in drivers/media/dvb-core/dvb_frontend.c when a task is in !TASK_RUNNING. A local user can trigger a deadlock and crash the kernel.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 22.04 - 23.04

linux-image-virtual-hwe-22.04 (Ubuntu package): before 6.2.0.32.32~22.04.9

linux-image-lowlatency-hwe-22.04 (Ubuntu package): before 6.2.0.1012.12~22.04.9

linux-image-lowlatency-64k-hwe-22.04 (Ubuntu package): before 6.2.0.1012.12~22.04.9

linux-image-generic-lpae-hwe-22.04 (Ubuntu package): before 6.2.0.32.32~22.04.9

linux-image-generic-hwe-22.04 (Ubuntu package): before 6.2.0.32.32~22.04.9

linux-image-generic-64k-hwe-22.04 (Ubuntu package): before 6.2.0.32.32~22.04.9

linux-image-virtual (Ubuntu package): before 6.2.0.32.32

linux-image-raspi-nolpae (Ubuntu package): before 6.2.0.1012.15

linux-image-raspi (Ubuntu package): before 6.2.0.1012.15

linux-image-lowlatency-64k (Ubuntu package): before 6.2.0.1012.12

linux-image-lowlatency (Ubuntu package): before 6.2.0.1012.12

linux-image-kvm (Ubuntu package): before 6.2.0.1012.12

linux-image-generic-lpae (Ubuntu package): before 6.2.0.32.32

linux-image-generic-64k (Ubuntu package): before 6.2.0.32.32

linux-image-generic (Ubuntu package): before 6.2.0.32.32

linux-image-aws (Ubuntu package): before 6.2.0.1011.12

linux-image-6.2.0-32-generic-lpae (Ubuntu package): before 6.2.0-32.32~22.04.1

linux-image-6.2.0-32-generic-64k (Ubuntu package): before 6.2.0-32.32~22.04.1

linux-image-6.2.0-32-generic (Ubuntu package): before 6.2.0-32.32~22.04.1

linux-image-6.2.0-1012-raspi (Ubuntu package): before 6.2.0-1012.14

linux-image-6.2.0-1012-lowlatency-64k (Ubuntu package): before 6.2.0-1012.12~22.04.1

linux-image-6.2.0-1012-lowlatency (Ubuntu package): before 6.2.0-1012.12~22.04.1

linux-image-6.2.0-1012-kvm (Ubuntu package): before 6.2.0-1012.12

linux-image-6.2.0-1011-aws (Ubuntu package): before 6.2.0-1011.11~22.04.1

CPE2.3

• cpe:2.3:o:canonical:ubuntu:23.04:*:*:*:*:*:*:
• cpe:2.3:o:canonical:ubuntu:22.04:*:*:*:*:*:*:

External links

http://ubuntu.com/security/notices/USN-6338-1

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

4) Resource exhaustion

EUVDB-ID: #VU80481

Risk: Medium

CVSSv3.1: 7.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-32247

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to ksmbd does not properly control consumption of internal resources when handling SMB2_SESSION_SETUP commands. A remote attacker can send specially crafted data to the server during session setup, trigger memory exhaustion and perform a denial of service (DoS) attack.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 22.04 - 23.04

linux-image-virtual-hwe-22.04 (Ubuntu package): before 6.2.0.32.32~22.04.9

linux-image-lowlatency-hwe-22.04 (Ubuntu package): before 6.2.0.1012.12~22.04.9

linux-image-lowlatency-64k-hwe-22.04 (Ubuntu package): before 6.2.0.1012.12~22.04.9

linux-image-generic-lpae-hwe-22.04 (Ubuntu package): before 6.2.0.32.32~22.04.9

linux-image-generic-hwe-22.04 (Ubuntu package): before 6.2.0.32.32~22.04.9

linux-image-generic-64k-hwe-22.04 (Ubuntu package): before 6.2.0.32.32~22.04.9

linux-image-virtual (Ubuntu package): before 6.2.0.32.32

linux-image-raspi-nolpae (Ubuntu package): before 6.2.0.1012.15

linux-image-raspi (Ubuntu package): before 6.2.0.1012.15

linux-image-lowlatency-64k (Ubuntu package): before 6.2.0.1012.12

linux-image-lowlatency (Ubuntu package): before 6.2.0.1012.12

linux-image-kvm (Ubuntu package): before 6.2.0.1012.12

linux-image-generic-lpae (Ubuntu package): before 6.2.0.32.32

linux-image-generic-64k (Ubuntu package): before 6.2.0.32.32

linux-image-generic (Ubuntu package): before 6.2.0.32.32

linux-image-aws (Ubuntu package): before 6.2.0.1011.12

linux-image-6.2.0-32-generic-lpae (Ubuntu package): before 6.2.0-32.32~22.04.1

linux-image-6.2.0-32-generic-64k (Ubuntu package): before 6.2.0-32.32~22.04.1

linux-image-6.2.0-32-generic (Ubuntu package): before 6.2.0-32.32~22.04.1

linux-image-6.2.0-1012-raspi (Ubuntu package): before 6.2.0-1012.14

linux-image-6.2.0-1012-lowlatency-64k (Ubuntu package): before 6.2.0-1012.12~22.04.1

linux-image-6.2.0-1012-lowlatency (Ubuntu package): before 6.2.0-1012.12~22.04.1

linux-image-6.2.0-1012-kvm (Ubuntu package): before 6.2.0-1012.12

linux-image-6.2.0-1011-aws (Ubuntu package): before 6.2.0-1011.11~22.04.1

CPE2.3

• cpe:2.3:o:canonical:ubuntu:23.04:*:*:*:*:*:*:
• cpe:2.3:o:canonical:ubuntu:22.04:*:*:*:*:*:*:

External links

http://ubuntu.com/security/notices/USN-6338-1

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

5) Race condition

EUVDB-ID: #VU77497

Risk: High

CVSSv3.1: 7.1 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-32250

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to a race condition within the fs/ksmbd/connection.c in ksmbd in Linux kernel when processing SMB2_SESSION_SETUP commands. A remote attacker can exploit the race by sending concurrent session setup and logoff request and execute arbitrary code on the system.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 22.04 - 23.04

linux-image-virtual-hwe-22.04 (Ubuntu package): before 6.2.0.32.32~22.04.9

linux-image-lowlatency-hwe-22.04 (Ubuntu package): before 6.2.0.1012.12~22.04.9

linux-image-lowlatency-64k-hwe-22.04 (Ubuntu package): before 6.2.0.1012.12~22.04.9

linux-image-generic-lpae-hwe-22.04 (Ubuntu package): before 6.2.0.32.32~22.04.9

linux-image-generic-hwe-22.04 (Ubuntu package): before 6.2.0.32.32~22.04.9

linux-image-generic-64k-hwe-22.04 (Ubuntu package): before 6.2.0.32.32~22.04.9

linux-image-virtual (Ubuntu package): before 6.2.0.32.32

linux-image-raspi-nolpae (Ubuntu package): before 6.2.0.1012.15

linux-image-raspi (Ubuntu package): before 6.2.0.1012.15

linux-image-lowlatency-64k (Ubuntu package): before 6.2.0.1012.12

linux-image-lowlatency (Ubuntu package): before 6.2.0.1012.12

linux-image-kvm (Ubuntu package): before 6.2.0.1012.12

linux-image-generic-lpae (Ubuntu package): before 6.2.0.32.32

linux-image-generic-64k (Ubuntu package): before 6.2.0.32.32

linux-image-generic (Ubuntu package): before 6.2.0.32.32

linux-image-aws (Ubuntu package): before 6.2.0.1011.12

linux-image-6.2.0-32-generic-lpae (Ubuntu package): before 6.2.0-32.32~22.04.1

linux-image-6.2.0-32-generic-64k (Ubuntu package): before 6.2.0-32.32~22.04.1

linux-image-6.2.0-32-generic (Ubuntu package): before 6.2.0-32.32~22.04.1

linux-image-6.2.0-1012-raspi (Ubuntu package): before 6.2.0-1012.14

linux-image-6.2.0-1012-lowlatency-64k (Ubuntu package): before 6.2.0-1012.12~22.04.1

linux-image-6.2.0-1012-lowlatency (Ubuntu package): before 6.2.0-1012.12~22.04.1

linux-image-6.2.0-1012-kvm (Ubuntu package): before 6.2.0-1012.12

linux-image-6.2.0-1011-aws (Ubuntu package): before 6.2.0-1011.11~22.04.1

CPE2.3

• cpe:2.3:o:canonical:ubuntu:23.04:*:*:*:*:*:*:
• cpe:2.3:o:canonical:ubuntu:22.04:*:*:*:*:*:*:

External links

http://ubuntu.com/security/notices/USN-6338-1

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

6) NULL pointer dereference

EUVDB-ID: #VU80492

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-32252

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error when handling SMB2_LOGOFF commands in ksmbd. A remote attacker can send specially crafted data to the server and perform a denial of service (DoS) attack.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 22.04 - 23.04

linux-image-virtual-hwe-22.04 (Ubuntu package): before 6.2.0.32.32~22.04.9

linux-image-lowlatency-hwe-22.04 (Ubuntu package): before 6.2.0.1012.12~22.04.9

linux-image-lowlatency-64k-hwe-22.04 (Ubuntu package): before 6.2.0.1012.12~22.04.9

linux-image-generic-lpae-hwe-22.04 (Ubuntu package): before 6.2.0.32.32~22.04.9

linux-image-generic-hwe-22.04 (Ubuntu package): before 6.2.0.32.32~22.04.9

linux-image-generic-64k-hwe-22.04 (Ubuntu package): before 6.2.0.32.32~22.04.9

linux-image-virtual (Ubuntu package): before 6.2.0.32.32

linux-image-raspi-nolpae (Ubuntu package): before 6.2.0.1012.15

linux-image-raspi (Ubuntu package): before 6.2.0.1012.15

linux-image-lowlatency-64k (Ubuntu package): before 6.2.0.1012.12

linux-image-lowlatency (Ubuntu package): before 6.2.0.1012.12

linux-image-kvm (Ubuntu package): before 6.2.0.1012.12

linux-image-generic-lpae (Ubuntu package): before 6.2.0.32.32

linux-image-generic-64k (Ubuntu package): before 6.2.0.32.32

linux-image-generic (Ubuntu package): before 6.2.0.32.32

linux-image-aws (Ubuntu package): before 6.2.0.1011.12

linux-image-6.2.0-32-generic-lpae (Ubuntu package): before 6.2.0-32.32~22.04.1

linux-image-6.2.0-32-generic-64k (Ubuntu package): before 6.2.0-32.32~22.04.1

linux-image-6.2.0-32-generic (Ubuntu package): before 6.2.0-32.32~22.04.1

linux-image-6.2.0-1012-raspi (Ubuntu package): before 6.2.0-1012.14

linux-image-6.2.0-1012-lowlatency-64k (Ubuntu package): before 6.2.0-1012.12~22.04.1

linux-image-6.2.0-1012-lowlatency (Ubuntu package): before 6.2.0-1012.12~22.04.1

linux-image-6.2.0-1012-kvm (Ubuntu package): before 6.2.0-1012.12

linux-image-6.2.0-1011-aws (Ubuntu package): before 6.2.0-1011.11~22.04.1

CPE2.3

• cpe:2.3:o:canonical:ubuntu:23.04:*:*:*:*:*:*:
• cpe:2.3:o:canonical:ubuntu:22.04:*:*:*:*:*:*:

External links

http://ubuntu.com/security/notices/USN-6338-1

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

7) Race condition

EUVDB-ID: #VU80494

Risk: High

CVSSv3.1: 7.1 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-32257

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to a race condition when handling SMB2_SESSION_SETUP and SMB2_LOGOFF commands. A remote attacker can send specially crafted data to the affected server, trigger a race condition and execute arbitrary code on the system.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 22.04 - 23.04

linux-image-virtual-hwe-22.04 (Ubuntu package): before 6.2.0.32.32~22.04.9

linux-image-lowlatency-hwe-22.04 (Ubuntu package): before 6.2.0.1012.12~22.04.9

linux-image-lowlatency-64k-hwe-22.04 (Ubuntu package): before 6.2.0.1012.12~22.04.9

linux-image-generic-lpae-hwe-22.04 (Ubuntu package): before 6.2.0.32.32~22.04.9

linux-image-generic-hwe-22.04 (Ubuntu package): before 6.2.0.32.32~22.04.9

linux-image-generic-64k-hwe-22.04 (Ubuntu package): before 6.2.0.32.32~22.04.9

linux-image-virtual (Ubuntu package): before 6.2.0.32.32

linux-image-raspi-nolpae (Ubuntu package): before 6.2.0.1012.15

linux-image-raspi (Ubuntu package): before 6.2.0.1012.15

linux-image-lowlatency-64k (Ubuntu package): before 6.2.0.1012.12

linux-image-lowlatency (Ubuntu package): before 6.2.0.1012.12

linux-image-kvm (Ubuntu package): before 6.2.0.1012.12

linux-image-generic-lpae (Ubuntu package): before 6.2.0.32.32

linux-image-generic-64k (Ubuntu package): before 6.2.0.32.32

linux-image-generic (Ubuntu package): before 6.2.0.32.32

linux-image-aws (Ubuntu package): before 6.2.0.1011.12

linux-image-6.2.0-32-generic-lpae (Ubuntu package): before 6.2.0-32.32~22.04.1

linux-image-6.2.0-32-generic-64k (Ubuntu package): before 6.2.0-32.32~22.04.1

linux-image-6.2.0-32-generic (Ubuntu package): before 6.2.0-32.32~22.04.1

linux-image-6.2.0-1012-raspi (Ubuntu package): before 6.2.0-1012.14

linux-image-6.2.0-1012-lowlatency-64k (Ubuntu package): before 6.2.0-1012.12~22.04.1

linux-image-6.2.0-1012-lowlatency (Ubuntu package): before 6.2.0-1012.12~22.04.1

linux-image-6.2.0-1012-kvm (Ubuntu package): before 6.2.0-1012.12

linux-image-6.2.0-1011-aws (Ubuntu package): before 6.2.0-1011.11~22.04.1

CPE2.3

• cpe:2.3:o:canonical:ubuntu:23.04:*:*:*:*:*:*:
• cpe:2.3:o:canonical:ubuntu:22.04:*:*:*:*:*:*:

External links

http://ubuntu.com/security/notices/USN-6338-1

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

8) Race condition

EUVDB-ID: #VU80501

Risk: High

CVSSv3.1: 7.1 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-32258

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to a race condition when processing SMB2_LOGOFF and SMB2_CLOSE commands in ksmbd. A remote attacker can send specially crafted data to the server and execute arbitrary code on the system.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 22.04 - 23.04

linux-image-virtual-hwe-22.04 (Ubuntu package): before 6.2.0.32.32~22.04.9

linux-image-lowlatency-hwe-22.04 (Ubuntu package): before 6.2.0.1012.12~22.04.9

linux-image-lowlatency-64k-hwe-22.04 (Ubuntu package): before 6.2.0.1012.12~22.04.9

linux-image-generic-lpae-hwe-22.04 (Ubuntu package): before 6.2.0.32.32~22.04.9

linux-image-generic-hwe-22.04 (Ubuntu package): before 6.2.0.32.32~22.04.9

linux-image-generic-64k-hwe-22.04 (Ubuntu package): before 6.2.0.32.32~22.04.9

linux-image-virtual (Ubuntu package): before 6.2.0.32.32

linux-image-raspi-nolpae (Ubuntu package): before 6.2.0.1012.15

linux-image-raspi (Ubuntu package): before 6.2.0.1012.15

linux-image-lowlatency-64k (Ubuntu package): before 6.2.0.1012.12

linux-image-lowlatency (Ubuntu package): before 6.2.0.1012.12

linux-image-kvm (Ubuntu package): before 6.2.0.1012.12

linux-image-generic-lpae (Ubuntu package): before 6.2.0.32.32

linux-image-generic-64k (Ubuntu package): before 6.2.0.32.32

linux-image-generic (Ubuntu package): before 6.2.0.32.32

linux-image-aws (Ubuntu package): before 6.2.0.1011.12

linux-image-6.2.0-32-generic-lpae (Ubuntu package): before 6.2.0-32.32~22.04.1

linux-image-6.2.0-32-generic-64k (Ubuntu package): before 6.2.0-32.32~22.04.1

linux-image-6.2.0-32-generic (Ubuntu package): before 6.2.0-32.32~22.04.1

linux-image-6.2.0-1012-raspi (Ubuntu package): before 6.2.0-1012.14

linux-image-6.2.0-1012-lowlatency-64k (Ubuntu package): before 6.2.0-1012.12~22.04.1

linux-image-6.2.0-1012-lowlatency (Ubuntu package): before 6.2.0-1012.12~22.04.1

linux-image-6.2.0-1012-kvm (Ubuntu package): before 6.2.0-1012.12

linux-image-6.2.0-1011-aws (Ubuntu package): before 6.2.0-1011.11~22.04.1

CPE2.3

• cpe:2.3:o:canonical:ubuntu:23.04:*:*:*:*:*:*:
• cpe:2.3:o:canonical:ubuntu:22.04:*:*:*:*:*:*:

External links

http://ubuntu.com/security/notices/USN-6338-1

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

9) Out-of-bounds read

EUVDB-ID: #VU80499

Risk: Medium

CVSSv3.1: 7.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-38426

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information or perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary condition within the smb2_find_context_vals() function. A remote attacker can send specially crafted data to the server, trigger an out-of-bounds read error and read contents of memory on the system or perform a denial of service (DoS) attack.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 22.04 - 23.04

linux-image-virtual-hwe-22.04 (Ubuntu package): before 6.2.0.32.32~22.04.9

linux-image-lowlatency-hwe-22.04 (Ubuntu package): before 6.2.0.1012.12~22.04.9

linux-image-lowlatency-64k-hwe-22.04 (Ubuntu package): before 6.2.0.1012.12~22.04.9

linux-image-generic-lpae-hwe-22.04 (Ubuntu package): before 6.2.0.32.32~22.04.9

linux-image-generic-hwe-22.04 (Ubuntu package): before 6.2.0.32.32~22.04.9

linux-image-generic-64k-hwe-22.04 (Ubuntu package): before 6.2.0.32.32~22.04.9

linux-image-virtual (Ubuntu package): before 6.2.0.32.32

linux-image-raspi-nolpae (Ubuntu package): before 6.2.0.1012.15

linux-image-raspi (Ubuntu package): before 6.2.0.1012.15

linux-image-lowlatency-64k (Ubuntu package): before 6.2.0.1012.12

linux-image-lowlatency (Ubuntu package): before 6.2.0.1012.12

linux-image-kvm (Ubuntu package): before 6.2.0.1012.12

linux-image-generic-lpae (Ubuntu package): before 6.2.0.32.32

linux-image-generic-64k (Ubuntu package): before 6.2.0.32.32

linux-image-generic (Ubuntu package): before 6.2.0.32.32

linux-image-aws (Ubuntu package): before 6.2.0.1011.12

linux-image-6.2.0-32-generic-lpae (Ubuntu package): before 6.2.0-32.32~22.04.1

linux-image-6.2.0-32-generic-64k (Ubuntu package): before 6.2.0-32.32~22.04.1

linux-image-6.2.0-32-generic (Ubuntu package): before 6.2.0-32.32~22.04.1

linux-image-6.2.0-1012-raspi (Ubuntu package): before 6.2.0-1012.14

linux-image-6.2.0-1012-lowlatency-64k (Ubuntu package): before 6.2.0-1012.12~22.04.1

linux-image-6.2.0-1012-lowlatency (Ubuntu package): before 6.2.0-1012.12~22.04.1

linux-image-6.2.0-1012-kvm (Ubuntu package): before 6.2.0-1012.12

linux-image-6.2.0-1011-aws (Ubuntu package): before 6.2.0-1011.11~22.04.1

CPE2.3

• cpe:2.3:o:canonical:ubuntu:23.04:*:*:*:*:*:*:
• cpe:2.3:o:canonical:ubuntu:22.04:*:*:*:*:*:*:

External links

http://ubuntu.com/security/notices/USN-6338-1

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

10) Out-of-bounds read

EUVDB-ID: #VU80498

Risk: Medium

CVSSv3.1: 7.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-38428

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information or perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary condition in fs/ksmbd/smb2pdu.c. A remote attacker can send specially crafted data to the server, trigger an out-of-bounds read error and read contents of memory on the system or perform a denial of service (DoS) attack.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 22.04 - 23.04

linux-image-virtual-hwe-22.04 (Ubuntu package): before 6.2.0.32.32~22.04.9

linux-image-lowlatency-hwe-22.04 (Ubuntu package): before 6.2.0.1012.12~22.04.9

linux-image-lowlatency-64k-hwe-22.04 (Ubuntu package): before 6.2.0.1012.12~22.04.9

linux-image-generic-lpae-hwe-22.04 (Ubuntu package): before 6.2.0.32.32~22.04.9

linux-image-generic-hwe-22.04 (Ubuntu package): before 6.2.0.32.32~22.04.9

linux-image-generic-64k-hwe-22.04 (Ubuntu package): before 6.2.0.32.32~22.04.9

linux-image-virtual (Ubuntu package): before 6.2.0.32.32

linux-image-raspi-nolpae (Ubuntu package): before 6.2.0.1012.15

linux-image-raspi (Ubuntu package): before 6.2.0.1012.15

linux-image-lowlatency-64k (Ubuntu package): before 6.2.0.1012.12

linux-image-lowlatency (Ubuntu package): before 6.2.0.1012.12

linux-image-kvm (Ubuntu package): before 6.2.0.1012.12

linux-image-generic-lpae (Ubuntu package): before 6.2.0.32.32

linux-image-generic-64k (Ubuntu package): before 6.2.0.32.32

linux-image-generic (Ubuntu package): before 6.2.0.32.32

linux-image-aws (Ubuntu package): before 6.2.0.1011.12

linux-image-6.2.0-32-generic-lpae (Ubuntu package): before 6.2.0-32.32~22.04.1

linux-image-6.2.0-32-generic-64k (Ubuntu package): before 6.2.0-32.32~22.04.1

linux-image-6.2.0-32-generic (Ubuntu package): before 6.2.0-32.32~22.04.1

linux-image-6.2.0-1012-raspi (Ubuntu package): before 6.2.0-1012.14

linux-image-6.2.0-1012-lowlatency-64k (Ubuntu package): before 6.2.0-1012.12~22.04.1

linux-image-6.2.0-1012-lowlatency (Ubuntu package): before 6.2.0-1012.12~22.04.1

linux-image-6.2.0-1012-kvm (Ubuntu package): before 6.2.0-1012.12

linux-image-6.2.0-1011-aws (Ubuntu package): before 6.2.0-1011.11~22.04.1

CPE2.3

• cpe:2.3:o:canonical:ubuntu:23.04:*:*:*:*:*:*:
• cpe:2.3:o:canonical:ubuntu:22.04:*:*:*:*:*:*:

External links

http://ubuntu.com/security/notices/USN-6338-1

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

11) Off-by-one

EUVDB-ID: #VU80497

Risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-38429

CWE-ID: CWE-193 - Off-by-one Error

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to an off-by-one error within the ksmbd_smb2_check_message() function in fs/ksmbd/connection.c. A remote attacker can trigger an off-by-one error and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 22.04 - 23.04

linux-image-virtual-hwe-22.04 (Ubuntu package): before 6.2.0.32.32~22.04.9

linux-image-lowlatency-hwe-22.04 (Ubuntu package): before 6.2.0.1012.12~22.04.9

linux-image-lowlatency-64k-hwe-22.04 (Ubuntu package): before 6.2.0.1012.12~22.04.9

linux-image-generic-lpae-hwe-22.04 (Ubuntu package): before 6.2.0.32.32~22.04.9

linux-image-generic-hwe-22.04 (Ubuntu package): before 6.2.0.32.32~22.04.9

linux-image-generic-64k-hwe-22.04 (Ubuntu package): before 6.2.0.32.32~22.04.9

linux-image-virtual (Ubuntu package): before 6.2.0.32.32

linux-image-raspi-nolpae (Ubuntu package): before 6.2.0.1012.15

linux-image-raspi (Ubuntu package): before 6.2.0.1012.15

linux-image-lowlatency-64k (Ubuntu package): before 6.2.0.1012.12

linux-image-lowlatency (Ubuntu package): before 6.2.0.1012.12

linux-image-kvm (Ubuntu package): before 6.2.0.1012.12

linux-image-generic-lpae (Ubuntu package): before 6.2.0.32.32

linux-image-generic-64k (Ubuntu package): before 6.2.0.32.32

linux-image-generic (Ubuntu package): before 6.2.0.32.32

linux-image-aws (Ubuntu package): before 6.2.0.1011.12

linux-image-6.2.0-32-generic-lpae (Ubuntu package): before 6.2.0-32.32~22.04.1

linux-image-6.2.0-32-generic-64k (Ubuntu package): before 6.2.0-32.32~22.04.1

linux-image-6.2.0-32-generic (Ubuntu package): before 6.2.0-32.32~22.04.1

linux-image-6.2.0-1012-raspi (Ubuntu package): before 6.2.0-1012.14

linux-image-6.2.0-1012-lowlatency-64k (Ubuntu package): before 6.2.0-1012.12~22.04.1

linux-image-6.2.0-1012-lowlatency (Ubuntu package): before 6.2.0-1012.12~22.04.1

linux-image-6.2.0-1012-kvm (Ubuntu package): before 6.2.0-1012.12

linux-image-6.2.0-1011-aws (Ubuntu package): before 6.2.0-1011.11~22.04.1

CPE2.3

• cpe:2.3:o:canonical:ubuntu:23.04:*:*:*:*:*:*:
• cpe:2.3:o:canonical:ubuntu:22.04:*:*:*:*:*:*:

External links

http://ubuntu.com/security/notices/USN-6338-1

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.