SB2021100520 - Privilege escalation in Linux hamradio driver
Published: October 5, 2021 Updated: November 10, 2022
Security Bulletin ID
SB2021100520
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) Out-of-bounds write (CVE-ID: CVE-2021-42008)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error in the decode_data() function in drivers/net/hamradio/6pack.c in the Linux kernel. A local user can send input from a process that has the CAP_NET_ADMIN capability and escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=19d1532a187669ce86d5a2696eb7275310070793
- https://www.youtube.com/watch?v=d5f9xLK8Vhw
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.13
- https://security.netapp.com/advisory/ntap-20211104-0002/
- https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html