SB2021060737 - Privilege escalation in Linux kernel XFRM subsystem
Published: June 7, 2021 Updated: November 22, 2023
Security Bulletin ID
SB2021060737
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-2019-25045)
The vulnerability allows a local authenticated user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the XFRM subsystem. A local authenticated user can trigger a use-after-free error and escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.19
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=dbb2483b2a46fbaf833cfb5deb5ed9cace9c7399
- https://syzkaller.appspot.com/bug?id=f99edaeec58ad40380ed5813d89e205861be2896
- https://sites.google.com/view/syzscope/warning-in-xfrm_state_fini-2
- https://security.netapp.com/advisory/ntap-20210720-0003/