Permissions, Privileges, and Access Controls in Xen - CVE-2019-17343
Published: March 5, 2019 / Updated: July 28, 2020
Vulnerability identifier: #VU17904
CSH Severity: Low
CVSS v4: 9.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H]
CVE-ID: CVE-2019-17343
CWE-ID: CWE-264
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to insecure processing of PV domains and related configuration. An untrusted PV domain with access to a physical device can DMA into its own pagetables, leading to privilege escalation.
Affected software
Xen
Debian Linux
xen (Alpine package)
xen (Debian package)
Debian Linux
xen (Alpine package)
xen (Debian package)
How to mitigate CVE-2019-17343
Apply patches:
xen (Debian package) - addressed in versions 4.8.5.final+shim4.10.4-1+deb9u12, 4.11.3+24-g14b62ab3e5-1~deb10u1