Buffer overflow in Xen - CVE-2016-7094
Published: September 21, 2016 / Updated: July 28, 2020
Vulnerability identifier: #VU32241
CSH Severity: Low
CVSS v4: 5.6 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2016-7094
CWE-ID: CWE-119
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local privileged user to perform a denial of service (DoS) attack.
Buffer overflow in Xen 4.7.x and earlier allows local x86 HVM guest OS administrators on guests running with shadow paging to cause a denial of service via a pagetable update.
Affected software
Xen
Gentoo Linux
SUSE Linux
Fedora
xen (Alpine package)
xen
Gentoo Linux
SUSE Linux
Fedora
xen (Alpine package)
xen
How to mitigate CVE-2016-7094
Install update from vendor's website.
xen (Alpine package) - addressed in versions 4.4.4-r1, 4.5.3-r1, 4.6.3-r2
xen - addressed in versions 4.5.3-10.fc23, 4.6.3-5.fc24, 4.7.0-5.fc25
xen - addressed in versions 4.5.3-10.fc23, 4.6.3-5.fc24, 4.7.0-5.fc25
External References
- http://support.citrix.com/article/CTX216071
- http://www.debian.org/security/2016/dsa-3663
- http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
- http://www.securityfocus.com/bid/92864
- http://www.securitytracker.com/id/1036753
- http://xenbits.xen.org/xsa/advisory-187.html
- http://xenbits.xen.org/xsa/xsa187-0001-x86-shadow-Avoid-overflowing-sh_ctxt-seg_reg.patch
- https://security.gentoo.org/glsa/201611-09