SB2019082718 - Denial of service in Linux kernel
Published: August 27, 2019 Updated: April 17, 2020
Security Bulletin ID
SB2019082718
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Out-of-bounds read (CVE-ID: CVE-2019-15666)
The vulnerability allows a local user to perform a denial of service attack.
The vulnerability exists due to a boundary condition in __xfrm_policy_unlink, which will cause denial of service, because
verify_newpolicy_info in net/xfrm/xfrm_user.c mishandles directory
validation.
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=b805d78d300bcf2c83d6df7da0c818b0fee41427
- https://lists.debian.org/debian-lts-announce/2019/09/msg00014.html
- https://lists.debian.org/debian-lts-announce/2019/09/msg00015.html