Permissions, Privileges, and Access Controls in Fedora and Xen - CVE-2015-5166
Published: August 12, 2015 / Updated: August 9, 2020
Vulnerability identifier: #VU40677
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2015-5166
CWE-ID: CWE-264
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Fedoraproject
Xen Project
Xen Project
Affected software:
Fedora
Xen
Fedora
Xen
Detailed vulnerability description
The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.
Use-after-free vulnerability in QEMU in Xen 4.5.x and earlier does not completely unplug emulated block devices, which allows local HVM guest users to gain privileges by unplugging a block device twice.
How to mitigate CVE-2015-5166
Install update from vendor's website.
Sources
- http://lists.fedoraproject.org/pipermail/package-announce/2015-September/165373.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-September/167792.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-September/167820.html
- http://www.securityfocus.com/bid/76152
- http://www.securitytracker.com/id/1033175
- http://xenbits.xen.org/xsa/advisory-139.html