Ubuntu update for linux-azure-5.15

Published: 2023-05-01 | Updated: 2024-05-31

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2023-1829 CVE-2023-1872
CWE-ID	CWE-416
Exploitation vector	Local
Public exploit	Public exploit code for vulnerability #1 is available.
Vulnerable software	Ubuntu Operating systems & Components / Operating system linux-image-azure-fde (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-azure-cvm (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.15.0-1037-azure (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-azure (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-kvm (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.15.0-1037-azure-fde (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.15.0-1032-kvm (Ubuntu package) Operating systems & Components / Operating system package or component
Vendor	Canonical Ltd.

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Use-after-free

EUVDB-ID: #VU75448

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-2023-1829

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 tcindex_delete() function. A local user can trigger a use-after-free error and execute arbitrary code with root privileges.

Mitigation

Update the affected package linux-azure-5.15 to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 22.04

linux-image-azure-fde (Ubuntu package): before 5.15.0.1037.44.14

linux-image-azure-cvm (Ubuntu package): before 5.15.0.1037.44~20.04.27

linux-image-5.15.0-1037-azure (Ubuntu package): before 5.15.0-1037.44~20.04.1

linux-image-azure (Ubuntu package): before 5.15.0.1037.44~20.04.27

linux-image-kvm (Ubuntu package): before 5.15.0.1032.28

linux-image-5.15.0-1037-azure-fde (Ubuntu package): before 5.15.0-1037.44.1

linux-image-5.15.0-1032-kvm (Ubuntu package): before 5.15.0-1032.37

CPE2.3

External links

https://ubuntu.com/security/notices/USN-6051-1

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.

2) Use-after-free

EUVDB-ID: #VU75529