Main Vulnerability Database Vulnerabilities #VU31984

Infinite loop in Xen - CVE-2019-17350

Published: July 28, 2020

Vulnerability identifier: #VU31984

CSH Severity: Medium

CVSS v4: 8.2 [CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H]

CVE-ID: CVE-2019-17350

CWE-ID: CWE-835

Exploitation vector: Adjecent network

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote user to perform a denial of service (DoS) attack.

An issue was discovered in Xen through 4.12.x allowing Arm domU attackers to cause a denial of service (infinite loop) involving a compare-and-exchange operation.

Affected software

Xen
Debian Linux
xen (Alpine package)
xen (Debian package)

How to mitigate CVE-2019-17350

Install updates from vendor's website.

xen (Debian package) - addressed in versions 4.8.5.final+shim4.10.4-1+deb9u12, 4.11.3+24-g14b62ab3e5-1~deb10u1

External References

http://xenbits.xen.org/xsa/advisory-295.html
https://seclists.org/bugtraq/2020/Jan/21
https://www.debian.org/security/2020/dsa-4602
https://xenbits.xen.org/xsa/advisory-295.html

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