SB2023041829 - Local denial of service in Linux kernel Netlink
Published: April 18, 2023
Security Bulletin ID
SB2023041829
CSH 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 vulnerability.
1) Uncontrolled Recursion (CVE-ID: CVE-2020-36691)
CWE-ID: CWE-674 - Uncontrolled Recursion
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to uncontrolled recursion in lib/nlattr.c. A local user can use a nested Netlink policy with a back reference to crash the kernel.
Remediation
Install update from vendor's website.