Resource management error in Xen - CVE-2019-17348

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Main Vulnerability Database Vulnerabilities #VU17899

Resource management error in Xen - CVE-2019-17348

Published: March 5, 2019 / Updated: July 28, 2020


Vulnerability identifier: #VU17899
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-2019-17348
CWE-ID: CWE-399
Exploitation vector: Adjecent network
Exploit availability: No public exploit available

Vulnerability details

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

The vulnerability exists due to insufficient TLB flushing when using PCID on 64-bit x86 PV guest systems. A local user with access to guest operating system can use a specially crafted program to crash the Xen host.


Affected software

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

How to mitigate CVE-2019-17348


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

External References

Related Security Bulletins