Incorrect calculation in Xen - CVE-2016-9377
Published: February 22, 2017 / Updated: July 28, 2020
Vulnerability identifier: #VU32220
CSH Severity: Low
CVSS v4: 6.8 [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]
CVE-ID: CVE-2016-9377
CWE-ID: CWE-682
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local authenticated user to perform a denial of service (DoS) attack.
Xen 4.5.x through 4.7.x on AMD systems without the NRip feature, when emulating instructions that generate software interrupts, allows local HVM guest OS users to cause a denial of service (guest crash) by leveraging IDT entry miscalculation.
Affected software
Xen
xen (Alpine package)
xen
Fedora
xen (Alpine package)
xen
Fedora
How to mitigate CVE-2016-9377
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