Ubuntu update for linux-azure-4.15



Risk Medium
Patch available YES
Number of vulnerabilities 11
CVE-ID CVE-2022-20369
CVE-2022-26373
CVE-2022-2663
CVE-2022-29900
CVE-2022-29901
CVE-2022-3646
CVE-2022-3649
CVE-2022-39842
CVE-2022-41849
CVE-2022-41850
CVE-2022-43750
CWE-ID CWE-787
CWE-264
CWE-20
CWE-1037
CWE-476
CWE-416
CWE-190
CWE-362
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe 		Ubuntu
Operating systems & Components / Operating system

linux-image-azure-lts-18.04 (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-4.15.0-1161-azure (Ubuntu package)
Operating systems & Components / Operating system package or component

Vendor Canonical Ltd.

Security Bulletin

This security bulletin contains information about 11 vulnerabilities.

1) Out-of-bounds write

EUVDB-ID: #VU67474

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-2022-20369

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error within the v4l2_m2m_querybuf() function in v4l2-mem2mem.c. A local user can trigger ab out-of-bounds write and execute arbitrary code with elevated privileges.

Mitigation

Update the affected package linux-azure-4.15 to the latest version.

Vulnerable software versions

Ubuntu: 18.04

linux-image-azure-lts-18.04 (Ubuntu package): before 4.15.0.1161.129

linux-image-4.15.0-1161-azure (Ubuntu package): before 4.15.0-1161.176

CPE2.3 External links

http://ubuntu.com/security/notices/USN-5865-1


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) Security restrictions bypass

EUVDB-ID: #VU66549

Risk: Low

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

CVE-ID: CVE-2022-26373

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability exists due to non-transparent sharing of return predictor targets between contexts in Intel CPU processors. A local user can bypass the expected architecture isolation between contexts and gain access to sensitive information on the system.

Mitigation

Update the affected package linux-azure-4.15 to the latest version.

Vulnerable software versions

Ubuntu: 18.04

linux-image-azure-lts-18.04 (Ubuntu package): before 4.15.0.1161.129

linux-image-4.15.0-1161-azure (Ubuntu package): before 4.15.0-1161.176

CPE2.3 External links

http://ubuntu.com/security/notices/USN-5865-1


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) Input validation error

EUVDB-ID: #VU67510

Risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-2663

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass firewall rules.

The vulnerability exists due to insufficient validation of user-supplied input in nf_conntrack_irc in Linux kernel. A remote attacker can send unencrypted IRC with nf_conntrack_irc configured and bypass configured firewall rules.

Mitigation

Update the affected package linux-azure-4.15 to the latest version.

Vulnerable software versions

Ubuntu: 18.04

linux-image-azure-lts-18.04 (Ubuntu package): before 4.15.0.1161.129

linux-image-4.15.0-1161-azure (Ubuntu package): before 4.15.0-1161.176

CPE2.3 External links

http://ubuntu.com/security/notices/USN-5865-1


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.

4) Processor optimization removal or modification of security-critical code

EUVDB-ID: #VU65205

Risk: Low

CVSSv3.1: 6.1 [CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-29900

CWE-ID: CWE-1037 - Processor optimization removal or modification of security-critical code

Exploit availability: No

Description

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

The vulnerability exists due to a mistrained branch predictions for return instructions. A local user can execute arbitrary speculative code under certain microarchitecture-dependent conditions. The vulnerability was dubbed  RETbleed.

Mitigation

Update the affected package linux-azure-4.15 to the latest version.

Vulnerable software versions

Ubuntu: 18.04

linux-image-azure-lts-18.04 (Ubuntu package): before 4.15.0.1161.129

linux-image-4.15.0-1161-azure (Ubuntu package): before 4.15.0-1161.176

CPE2.3 External links

http://ubuntu.com/security/notices/USN-5865-1


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.

5) Processor optimization removal or modification of security-critical code

EUVDB-ID: #VU65220

Risk: Low

CVSSv3.1: 4.1 [CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-29901

CWE-ID: CWE-1037 - Processor optimization removal or modification of security-critical code

Exploit availability: No

Description

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to the way non-transparent sharing of branch predictor targets between contexts. A local user can exploit the vulnerability to gain access to sensitive information.

Mitigation

Update the affected package linux-azure-4.15 to the latest version.

Vulnerable software versions

Ubuntu: 18.04

linux-image-azure-lts-18.04 (Ubuntu package): before 4.15.0.1161.129

linux-image-4.15.0-1161-azure (Ubuntu package): before 4.15.0-1161.176

CPE2.3 External links

http://ubuntu.com/security/notices/USN-5865-1


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.

6) NULL pointer dereference

EUVDB-ID: #VU69299

Risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-3646

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 in the nilfs2 filesystem driver within the nilfs_attach_log_writer() function in fs/nilfs2/segment.c in Linux kernel. A remote attacker can trick the victim into mounting a specially crafted image and perform a denial of service (DoS) attack.

Mitigation

Update the affected package linux-azure-4.15 to the latest version.

Vulnerable software versions

Ubuntu: 18.04

linux-image-azure-lts-18.04 (Ubuntu package): before 4.15.0.1161.129

linux-image-4.15.0-1161-azure (Ubuntu package): before 4.15.0-1161.176

CPE2.3 External links

http://ubuntu.com/security/notices/USN-5865-1


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) Use-after-free

EUVDB-ID: #VU69298

Risk: Medium

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

CVE-ID: CVE-2022-3649

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error within the nilfs2 filesystem driver in nilfs_new_inode() function in fs/nilfs2/inode.c in Linux kernel. A remote attacker can trick the victim into mounting a specially crafted image, trigger a use-after-free error and execute arbitrary code on the system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation

Update the affected package linux-azure-4.15 to the latest version.

Vulnerable software versions

Ubuntu: 18.04

linux-image-azure-lts-18.04 (Ubuntu package): before 4.15.0.1161.129

linux-image-4.15.0-1161-azure (Ubuntu package): before 4.15.0-1161.176

CPE2.3 External links

http://ubuntu.com/security/notices/USN-5865-1


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) Integer overflow

EUVDB-ID: #VU67914

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-2022-39842

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

Description

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

The vulnerability exists due to integer overflow within the pxa3xx_gcu_write() function in drivers/video/fbdev/pxa3xx-gcu.c in Linux kernel. A local user can trigger an integer overflow and execute arbitrary code with escalated privileges.


Mitigation

Update the affected package linux-azure-4.15 to the latest version.

Vulnerable software versions

Ubuntu: 18.04

linux-image-azure-lts-18.04 (Ubuntu package): before 4.15.0.1161.129

linux-image-4.15.0-1161-azure (Ubuntu package): before 4.15.0-1161.176

CPE2.3 External links

http://ubuntu.com/security/notices/USN-5865-1


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.

9) Race condition

EUVDB-ID: #VU68340

Risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-41849

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

Exploit availability: No

Description

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

The vulnerability exists due to a race condition in the drivers/video/fbdev/smscufx.c in the Linux kernel. An attacker with physical proximity to the system can remove the USB device while calling open(), cause a race condition between the ufx_ops_open and ufx_usb_disconnect and perform a denial of service (DoS) attack.

Mitigation

Update the affected package linux-azure-4.15 to the latest version.

Vulnerable software versions

Ubuntu: 18.04

linux-image-azure-lts-18.04 (Ubuntu package): before 4.15.0.1161.129

linux-image-4.15.0-1161-azure (Ubuntu package): before 4.15.0-1161.176

CPE2.3 External links

http://ubuntu.com/security/notices/USN-5865-1


Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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

10) Race condition

EUVDB-ID: #VU69792

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-2022-41850

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

Exploit availability: No

Description

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

The vulnerability exists due to a race condition within the roccat_report_event() function in drivers/hid/hid-roccat.c. A local user can trigger a use-after-free error and perform a denial of service (DoS) attack.

Mitigation

Update the affected package linux-azure-4.15 to the latest version.

Vulnerable software versions

Ubuntu: 18.04

linux-image-azure-lts-18.04 (Ubuntu package): before 4.15.0.1161.129

linux-image-4.15.0-1161-azure (Ubuntu package): before 4.15.0-1161.176

CPE2.3 External links

http://ubuntu.com/security/notices/USN-5865-1


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.

11) Out-of-bounds write

EUVDB-ID: #VU69296

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-2022-43750

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error within the drivers/usb/mon/mon_bin.c in usbmon in the Linux kernel. A local user can trigger an out-of-bounds write and execute arbitrary code with elevated privileges.

Mitigation

Update the affected package linux-azure-4.15 to the latest version.

Vulnerable software versions

Ubuntu: 18.04

linux-image-azure-lts-18.04 (Ubuntu package): before 4.15.0.1161.129

linux-image-4.15.0-1161-azure (Ubuntu package): before 4.15.0-1161.176

CPE2.3 External links

http://ubuntu.com/security/notices/USN-5865-1


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.



###SIDEBAR###