Ubuntu update for linux-azure

1) Deadlock

EUVDB-ID: #VU81900

Risk: Medium

CVSSv3.1: 4.3 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-34324

CWE-ID: CWE-833 - Deadlock

Exploit availability: No

Description

The vulnerability allows a malicious guest to perform a denial of service (DoS) attack.

The vulnerability exists due to improper event handling in Linux kernel. A malicious guest can disable paravirtualized device to cause a deadlock in a backend domain (other than dom0).

Mitigation

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

Vulnerable software versions

Ubuntu: 23.10

linux-image-azure-fde (Ubuntu package): before 6.5.0.1015.17

linux-image-azure (Ubuntu package): before 6.5.0.1015.17

linux-image-6.5.0-1015-azure-fde (Ubuntu package): before 6.5.0-1015.15

linux-image-6.5.0-1015-azure (Ubuntu package): before 6.5.0-1015.15

External links

http://ubuntu.com/security/notices/USN-6652-1

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

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

2) Use-after-free

EUVDB-ID: #VU82758

Risk: Low

CVSSv3.1: 6.1 [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-2023-35827

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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

The vulnerability exists due to a use-after-free error within the ravb_remove in drivers/net/ethernet/renesas/ravb_main.c. A local authenticated user can trigger a use-after-free error and escalate privileges on the system.

Mitigation

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

Vulnerable software versions

Ubuntu: 23.10

linux-image-azure-fde (Ubuntu package): before 6.5.0.1015.17

linux-image-azure (Ubuntu package): before 6.5.0.1015.17

linux-image-6.5.0-1015-azure-fde (Ubuntu package): before 6.5.0-1015.15

linux-image-6.5.0-1015-azure (Ubuntu package): before 6.5.0-1015.15

External links

http://ubuntu.com/security/notices/USN-6652-1

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) Improper access control

EUVDB-ID: #VU82764

Risk: Low

CVSSv3.1: 7.6 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N/E:P/RL:O/RC:C]

CVE-ID: CVE-2023-46813

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: Yes

Description

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

The vulnerability exists due to improper access checking in the #VC handler and instruction emulation of the SEV-ES emulation of MMIO accesses. A local user can gain arbitrary write access to kernel memory and execute arbitrary code with elevated privileges.

Mitigation

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

Vulnerable software versions

Ubuntu: 23.10

linux-image-azure-fde (Ubuntu package): before 6.5.0.1015.17

linux-image-azure (Ubuntu package): before 6.5.0.1015.17

linux-image-6.5.0-1015-azure-fde (Ubuntu package): before 6.5.0-1015.15

linux-image-6.5.0-1015-azure (Ubuntu package): before 6.5.0-1015.15

External links

http://ubuntu.com/security/notices/USN-6652-1

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. However, proof of concept for this vulnerability is available.

4) NULL pointer dereference

EUVDB-ID: #VU83903

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-2023-46862

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 io_uring_show_fdinfo() function in io_uring/fdinfo.c. A local user can trigger a race with SQ thread exit and perform a denial of service (DoS) attack.

Mitigation

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

Vulnerable software versions

Ubuntu: 23.10

linux-image-azure-fde (Ubuntu package): before 6.5.0.1015.17

linux-image-azure (Ubuntu package): before 6.5.0.1015.17

linux-image-6.5.0-1015-azure-fde (Ubuntu package): before 6.5.0-1015.15

linux-image-6.5.0-1015-azure (Ubuntu package): before 6.5.0-1015.15

External links

http://ubuntu.com/security/notices/USN-6652-1

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) Race condition

EUVDB-ID: #VU85024

Risk: Low

CVSSv3.1: 7.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-51780

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 escalate privileges on the system.

The vulnerability exists due to a race condition in the ATM (Asynchronous Transfer Mode) subsystem in Linux kernel. A local user can exploit the race and escalate privileges on the system.

Mitigation

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

Vulnerable software versions

Ubuntu: 23.10

linux-image-azure-fde (Ubuntu package): before 6.5.0.1015.17

linux-image-azure (Ubuntu package): before 6.5.0.1015.17

linux-image-6.5.0-1015-azure-fde (Ubuntu package): before 6.5.0-1015.15

linux-image-6.5.0-1015-azure (Ubuntu package): before 6.5.0-1015.15

External links

http://ubuntu.com/security/notices/USN-6652-1

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) Race condition

EUVDB-ID: #VU85025

Risk: Low

CVSSv3.1: 7.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-51781

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 escalate privileges on the system.

The vulnerability exists due to a race condition in the Appletalk subsystem in Linux kernel. A local user can exploit the race and escalate privileges on the system.

Mitigation

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

Vulnerable software versions

Ubuntu: 23.10

linux-image-azure-fde (Ubuntu package): before 6.5.0.1015.17

linux-image-azure (Ubuntu package): before 6.5.0.1015.17

linux-image-6.5.0-1015-azure-fde (Ubuntu package): before 6.5.0-1015.15

linux-image-6.5.0-1015-azure (Ubuntu package): before 6.5.0-1015.15

External links

http://ubuntu.com/security/notices/USN-6652-1

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.

7) NULL pointer dereference

EUVDB-ID: #VU86244

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-2023-5972

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 nft_inner_init() and nft_expr_inner_parse() functions in nft_inner.c. A local user can set specially crafted values for the NFTA_INNER_NUM and NFTA_EXPR_NAM netlink attributes and perform a denial of service (DoS) attack.

Mitigation

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

Vulnerable software versions

Ubuntu: 23.10

linux-image-azure-fde (Ubuntu package): before 6.5.0.1015.17

linux-image-azure (Ubuntu package): before 6.5.0.1015.17

linux-image-6.5.0-1015-azure-fde (Ubuntu package): before 6.5.0-1015.15

linux-image-6.5.0-1015-azure (Ubuntu package): before 6.5.0-1015.15

External links

http://ubuntu.com/security/notices/USN-6652-1

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.

8) NULL pointer dereference

EUVDB-ID: #VU84096

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-2023-6176

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 in the Linux kernel API for the cryptographic algorithm scatterwalk functionality in scatterwalk_copychunks(). A local user can send a malicious packet with specific socket configuration and crash the OS kernel.

Mitigation

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

Vulnerable software versions

Ubuntu: 23.10

linux-image-azure-fde (Ubuntu package): before 6.5.0.1015.17

linux-image-azure (Ubuntu package): before 6.5.0.1015.17

linux-image-6.5.0-1015-azure-fde (Ubuntu package): before 6.5.0-1015.15

linux-image-6.5.0-1015-azure (Ubuntu package): before 6.5.0-1015.15

External links

http://ubuntu.com/security/notices/USN-6652-1

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: #VU85022

Risk: Low

CVSSv3.1: 7.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-6531

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 escalate privileges on the system.

The vulnerability exists due to a race condition when the unix garbage collector's deletion of a SKB races with unix_stream_read_generic() on the socket that the SKB is queued on. A local user can exploit the race and escalate privileges on the system.

Mitigation

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

Vulnerable software versions

Ubuntu: 23.10

linux-image-azure-fde (Ubuntu package): before 6.5.0.1015.17

linux-image-azure (Ubuntu package): before 6.5.0.1015.17

linux-image-6.5.0-1015-azure-fde (Ubuntu package): before 6.5.0-1015.15

linux-image-6.5.0-1015-azure (Ubuntu package): before 6.5.0-1015.15

External links

http://ubuntu.com/security/notices/USN-6652-1

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.

10) NULL pointer dereference

EUVDB-ID: #VU84512

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-2023-6622

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 nft_dynset_init() function in net/netfilter/nft_dynset.c in nf_tables. 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-azure to the latest version.

Vulnerable software versions

Ubuntu: 23.10

linux-image-azure-fde (Ubuntu package): before 6.5.0.1015.17

linux-image-azure (Ubuntu package): before 6.5.0.1015.17

linux-image-6.5.0-1015-azure-fde (Ubuntu package): before 6.5.0-1015.15

linux-image-6.5.0-1015-azure (Ubuntu package): before 6.5.0-1015.15

External links

http://ubuntu.com/security/notices/USN-6652-1

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) NULL pointer dereference

EUVDB-ID: #VU85423

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-2023-6915

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 ida_free() function in lib/idr.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-azure to the latest version.

Vulnerable software versions

Ubuntu: 23.10

linux-image-azure-fde (Ubuntu package): before 6.5.0.1015.17

linux-image-azure (Ubuntu package): before 6.5.0.1015.17

linux-image-6.5.0-1015-azure-fde (Ubuntu package): before 6.5.0-1015.15

linux-image-6.5.0-1015-azure (Ubuntu package): before 6.5.0-1015.15

External links

http://ubuntu.com/security/notices/USN-6652-1

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.

12) Integer underflow

EUVDB-ID: #VU86552

Risk: High

CVSSv3.1: 7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-0565

CWE-ID: CWE-191 - Integer underflow

Exploit availability: No

Description

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

The vulnerability exists due to integer underflow within the receive_encrypted_standard() function in fs/smb/client/smb2ops.c in the SMB Client sub-component in the Linux Kernel. A remote attacker can trick the victim to connect to a malicious SMB server, trigger an integer underflow 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-azure to the latest version.

Vulnerable software versions

Ubuntu: 23.10

linux-image-azure-fde (Ubuntu package): before 6.5.0.1015.17

linux-image-azure (Ubuntu package): before 6.5.0.1015.17

linux-image-6.5.0-1015-azure-fde (Ubuntu package): before 6.5.0-1015.15

linux-image-6.5.0-1015-azure (Ubuntu package): before 6.5.0-1015.15

External links

http://ubuntu.com/security/notices/USN-6652-1

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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

13) Use-after-free

EUVDB-ID: #VU86777

Risk: Low

CVSSv3.1: 7.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2024-0582

CWE-ID: CWE-416 - Use After Free

Exploit availability: Yes

Description

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

The vulnerability exists due to a use-after-free error within the io_uring functionality in the way a user registers a buffer ring with IORING_REGISTER_PBUF_RING, mmap() it, and then frees it. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.

Mitigation

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

Vulnerable software versions

Ubuntu: 23.10

linux-image-azure-fde (Ubuntu package): before 6.5.0.1015.17

linux-image-azure (Ubuntu package): before 6.5.0.1015.17

linux-image-6.5.0-1015-azure-fde (Ubuntu package): before 6.5.0-1015.15

linux-image-6.5.0-1015-azure (Ubuntu package): before 6.5.0-1015.15

External links

http://ubuntu.com/security/notices/USN-6652-1

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. However, proof of concept for this vulnerability is available.

14) Improper locking

EUVDB-ID: #VU86245

Risk: Low

CVSSv3.1: 5.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-0641

CWE-ID: CWE-667 - Improper Locking

Exploit availability: No

Description

The vulnerability allows a malicious guest to perform a denial of service attack (DoS) on the target system.

The vulnerability exists due to double-locking error within the tipc_crypto_key_revoke() function in net/tipc/crypto.c. A malicious guest can exploit this vulnerability to cause a deadlock, resulting in a denial of service.

Mitigation

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

Vulnerable software versions

Ubuntu: 23.10

linux-image-azure-fde (Ubuntu package): before 6.5.0.1015.17

linux-image-azure (Ubuntu package): before 6.5.0.1015.17

linux-image-6.5.0-1015-azure-fde (Ubuntu package): before 6.5.0-1015.15

linux-image-6.5.0-1015-azure (Ubuntu package): before 6.5.0-1015.15

External links

http://ubuntu.com/security/notices/USN-6652-1

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.

15) Out-of-bounds write

EUVDB-ID: #VU86246

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-2024-0646

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 when processing untrusted input in the Linux kernel’s Transport Layer Security functionality in the way a user calls a function splice with a ktls socket as the destination. A local user can trigger an out-of-bounds write and execute arbitrary code with elevated privileges.

Mitigation

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

Vulnerable software versions

Ubuntu: 23.10

linux-image-azure-fde (Ubuntu package): before 6.5.0.1015.17

linux-image-azure (Ubuntu package): before 6.5.0.1015.17

linux-image-6.5.0-1015-azure-fde (Ubuntu package): before 6.5.0-1015.15

linux-image-6.5.0-1015-azure (Ubuntu package): before 6.5.0-1015.15

External links

http://ubuntu.com/security/notices/USN-6652-1

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.