SB2022031307 - Privilege escalation in Linux kernel Netfilter
Published: March 13, 2022 Updated: June 7, 2024
Security Bulletin ID
SB2022031307
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 security vulnerability.
1) Heap-based buffer overflow (CVE-ID: CVE-2022-25636)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error in net/netfilter/nf_dup_netdev.c in the Linux kernel, related to nf_tables_offload. A local user can trigger a heap-based buffer overflow and execute arbitrary code with elevated privileges.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf.git/commit/?id=b1a5983f56e371046dcf164f90bfaf704d2b89f6
- https://www.openwall.com/lists/oss-security/2022/02/21/2
- http://www.openwall.com/lists/oss-security/2022/02/22/1
- https://www.debian.org/security/2022/dsa-5095
- https://nickgregory.me/linux/security/2022/03/12/cve-2022-25636/
- https://github.com/Bonfee/CVE-2022-25636