SB2019090437 - Use-after-free in Linux kernel
Published: September 4, 2019 Updated: October 23, 2019
Security Bulletin ID
SB2019090437
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Adjecent network
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-2018-21008)
The vulnerability allows a remote attacker to escalate privileges on the system.
The vulnerability exists due to use-after-free error in the file drivers/net/wireless/rsi/rsi_91x_mac80211.c. A remote attacker can use the function rsi_mac80211_detach to trigger use-after-free error and execute arbitrary code on the system with elevated privileges.
Remediation
Install update from vendor's website.
References
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00064.html
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00066.html
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.16.7
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=abd39c6ded9db53aa44c2540092bdd5fb6590fa8
- https://lists.debian.org/debian-lts-announce/2019/09/msg00025.html