Input validation error in Xen - CVE-2016-9380
Published: January 23, 2017 / Updated: July 28, 2020
Vulnerability identifier: #VU32217
CSH Severity: Low
CVSS v4: 8.6 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N]
CVE-ID: CVE-2016-9380
CWE-ID: CWE-20
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local authenticated user to read and manipulate data.
The pygrub boot loader emulator in Xen, when nul-delimited output format is requested, allows local pygrub-using guest OS administrators to read or delete arbitrary files on the host via NUL bytes in the bootloader configuration file.
Affected software
Xen
xen (Alpine package)
xen
Fedora
xen (Alpine package)
xen
Fedora
How to mitigate CVE-2016-9380
Install update from vendor's website.
xen (Alpine package) - update to 4.5.3-r2
xen - addressed in versions 4.5.5-4.fc23, 4.6.4-2.fc24, 4.7.1-3.fc25
xen - addressed in versions 4.5.5-4.fc23, 4.6.4-2.fc24, 4.7.1-3.fc25