Input validation error in Linux kernel - CVE-2019-5108

Vulnerability details

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

An exploitable denial-of-service vulnerability exists in the Linux kernel prior to mainline 5.3. An attacker could exploit this vulnerability by triggering AP to send IAPP location updates for stations before the required authentication process has completed. This could lead to different denial-of-service scenarios, either by causing CAM table attacks, or by leading to traffic flapping if faking already existing clients in other nearby APs of the same wireless infrastructure. An attacker can forge Authentication and Association Request packets to trigger this vulnerability.

Affected software

How to mitigate CVE-2019-5108

External References

• http://packetstormsecurity.com/files/156455/Kernel-Live-Patch-Security-Notice-LSN-0063-1.html
• https://git.kernel.org/linus/3e493173b7841259a08c5c8e5cbe90adb349da7e
• https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html
• https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html
• https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html
• https://security.netapp.com/advisory/ntap-20200204-0002/
• https://talosintelligence.com/vulnerability_reports/TALOS-2019-0900
• https://usn.ubuntu.com/4285-1/
• https://usn.ubuntu.com/4286-1/
• https://usn.ubuntu.com/4286-2/
• https://usn.ubuntu.com/4287-1/
• https://usn.ubuntu.com/4287-2/
• https://www.debian.org/security/2020/dsa-4698

Related Security Bulletins

• Input validation error in Linux kernel
• Red Hat Enterprise Linux for Real Time update for kernel-rt
• Red Hat Enterprise Linux 7 update for kernel-alt
• Slackware Linux update for kernel