Ubuntu update for linux-oem-6.0



| Updated: 2023-06-26
Risk Low
Patch available YES
Number of vulnerabilities 5
CVE-ID CVE-2023-1670
CVE-2023-2612
CVE-2023-26606
CVE-2023-30456
CVE-2023-32233
CWE-ID CWE-416
CWE-362
CWE-20
Exploitation vector Local
Public exploit Public exploit code for vulnerability #5 is available.
Vulnerable software
 Ubuntu
Operating systems & Components / Operating system

linux-image-6.0.0-1017-oem (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-oem-22.04b (Ubuntu package)
Operating systems & Components / Operating system package or component

Vendor Canonical Ltd.

Security Bulletin

This security bulletin contains information about 5 vulnerabilities.

1) Use-after-free

EUVDB-ID: #VU75450

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-1670

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

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 Xircom 16-bit PCMCIA (PC-card) Ethernet driver. A local user can trigger a use-after-free error and execute arbitrary code on the system.

Mitigation

Update the affected package linux-oem-6.0 to the latest version.

Vulnerable software versions

Ubuntu: 22.04

linux-image-6.0.0-1017-oem (Ubuntu package): before 6.0.0-1017.17

linux-image-oem-22.04b (Ubuntu package): before 6.0.0.1017.17

CPE2.3 External links

https://ubuntu.com/security/notices/USN-6123-1


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) Race condition

EUVDB-ID: #VU76655

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-2612

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 shiftfs filesystem when handling inode locking in some
situations. A local user can exploit the race and cause a denial of service (kernel deadlock).

Mitigation

Update the affected package linux-oem-6.0 to the latest version.

Vulnerable software versions

Ubuntu: 22.04

linux-image-6.0.0-1017-oem (Ubuntu package): before 6.0.0-1017.17

linux-image-oem-22.04b (Ubuntu package): before 6.0.0.1017.17

CPE2.3 External links

https://ubuntu.com/security/notices/USN-6123-1


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) Use-after-free

EUVDB-ID: #VU74156

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-26606

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

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 ntfs_trim_fs() function in fs/ntfs3/bitmap.c in Linux kernel. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.

Mitigation

Update the affected package linux-oem-6.0 to the latest version.

Vulnerable software versions

Ubuntu: 22.04

linux-image-6.0.0-1017-oem (Ubuntu package): before 6.0.0-1017.17

linux-image-oem-22.04b (Ubuntu package): before 6.0.0.1017.17

CPE2.3 External links

https://ubuntu.com/security/notices/USN-6123-1


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) Input validation error

EUVDB-ID: #VU75456

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-30456

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The vulnerability exists due to insufficient validation of consistency for for CR0 and CR4 in arch/x86/kvm/vmx/nested.c in the Linux kernel. A local user can execute arbitrary code with elevated privileges.

Mitigation

Update the affected package linux-oem-6.0 to the latest version.

Vulnerable software versions

Ubuntu: 22.04

linux-image-6.0.0-1017-oem (Ubuntu package): before 6.0.0-1017.17

linux-image-oem-22.04b (Ubuntu package): before 6.0.0.1017.17

CPE2.3 External links

https://ubuntu.com/security/notices/USN-6123-1


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) Use-after-free

EUVDB-ID: #VU75807

Risk: Low

CVSSv4.0: 7.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2023-32233

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 in Netfilter nf_tables when processing batch requests. A local user can trigger a use-after-free error and execute arbitrary code with root privileges.

Mitigation

Update the affected package linux-oem-6.0 to the latest version.

Vulnerable software versions

Ubuntu: 22.04

linux-image-6.0.0-1017-oem (Ubuntu package): before 6.0.0-1017.17

linux-image-oem-22.04b (Ubuntu package): before 6.0.0.1017.17

CPE2.3 External links

https://ubuntu.com/security/notices/USN-6123-1


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.



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