Buffer overflow in Debian Linux - CVE-2020-29568
Published: December 15, 2020 / Updated: April 30, 2021
Vulnerability identifier: #VU52771
CSH Severity: Low
CVSSv4.0: 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
CVE-ID: CVE-2020-29568
CWE-ID: CWE-119
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Debian Linux
Debian Linux
Software vendor:
Debian
Debian
Description
The vulnerability allows a local authenticated user to a crash the entire system.
An issue was discovered in Xen through 4.14.x. Some OSes (such as Linux, FreeBSD, and NetBSD) are processing watch events using a single thread. If the events are received faster than the thread is able to handle, they will get queued. As the queue is unbounded, a guest may be able to trigger an OOM in the backend. All systems with a FreeBSD, Linux, or NetBSD (any version) dom0 are vulnerable.
Remediation
Install update from vendor's website.