SB2022062427 - Privilege escalation in Linux kernel netfilter
Published: June 24, 2022 Updated: December 6, 2024
Security Bulletin ID
SB2022062427
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) Use-after-free (CVE-ID: CVE-2022-32250)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free incorrect NFT_STATEFUL_EXPR in net/netfilter/nf_tables_api.c in Linux kernel. A local user with ability to create user/net namespaces can execute arbitrary code with root privileges.
Remediation
Install update from vendor's website.
References
- https://www.openwall.com/lists/oss-security/2022/05/31/1
- https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/net/netfilter?id=520778042ccca019f3ffa136dd0ca565c486cedd
- http://www.openwall.com/lists/oss-security/2022/06/03/1
- http://www.openwall.com/lists/oss-security/2022/06/04/1
- https://www.debian.org/security/2022/dsa-5161
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UIZTJOJCVVEJVOQSCHE6IJQKMPISHQ5L/
- https://bugzilla.redhat.com/show_bug.cgi?id=2092427
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MO6Y3TC4WUUNKRP7OQA26OVTZTPCS6F2/
- http://www.openwall.com/lists/oss-security/2022/06/20/1
- https://www.zerodayinitiative.com/advisories/ZDI-23-1834/