SB2022082919 - Privilege escalation in Linux kernel
Published: August 29, 2022
Security Bulletin ID
SB2022082919
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2022-36123)
CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls
CVSSv4: 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
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to Linux kernel lacks a certain clear operation for the block starting symbol (.bss). A local user on the Xen PV guest OS can perform a denial of service attack or escalate privileges on the guest OS.
Remediation
Install update from vendor's website.
References
- https://github.com/sickcodes/security/blob/master/advisories/SICK-2022-128.md
- https://github.com/torvalds/linux/commit/74a0032b8524ee2bd4443128c0bf9775928680b0
- https://sick.codes/sick-2022-128
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.18.13
- https://github.com/torvalds/linux/commit/96e8fc5818686d4a1591bb6907e7fdb64ef29884