Memory corruption in Xen - CVE-2017-10920
Published: July 13, 2017
Vulnerability identifier: #VU7505
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2017-10920
CWE-ID: CWE-119
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local attacker to cause DoS conditions.
The weakness exists due to improper handling of a GNTMAP_device_map and GNTMAP_host_map mapping by the grant-table feature, when followed by only a GNTMAP_host_map unmapping. A local attacker can trigger count mismanagement and memory corruption and cause the application to crash.
Successful exploitation of the vulnerability results in denial of service.
The weakness exists due to improper handling of a GNTMAP_device_map and GNTMAP_host_map mapping by the grant-table feature, when followed by only a GNTMAP_host_map unmapping. A local attacker can trigger count mismanagement and memory corruption and cause the application to crash.
Successful exploitation of the vulnerability results in denial of service.
Affected software
Xen
Gentoo Linux
Fedora
Opensuse
xen (Alpine package)
xen
Gentoo Linux
Fedora
Opensuse
xen (Alpine package)
xen
How to mitigate CVE-2017-10920
Install update from vendor's website.
xen (Alpine package) - update to 4.8.2-r0
xen - addressed in versions 4.6.5-7.fc24, 4.7.2-7.fc25, 4.8.1-4.fc26
xen - addressed in versions 4.6.5-7.fc24, 4.7.2-7.fc25, 4.8.1-4.fc26