Permissions, Privileges, and Access Controls in Xen and Fedora - CVE-2015-5166
Published: August 12, 2015 / Updated: August 9, 2020
Vulnerability identifier: #VU40677
CSH Severity: High
CVSS v4: 8.6 [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]
CVE-ID: CVE-2015-5166
CWE-ID: CWE-264
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
Xen
Fedora
SUSE Linux
qemu
xen
Fedora
SUSE Linux
qemu
xen
How to mitigate CVE-2015-5166
Install update from vendor's website.
qemu - addressed in versions 2.3.0-7.fc22, 2.3.1-1.fc22, 2.4.0-0.2.rc4.fc23, 2.4.0-1.fc23
xen - addressed in versions 4.4.3-1.fc21, 4.4.3-3.fc21, 4.5.1-6.fc22, 4.5.1-6.fc23, 4.5.1-8.fc22
xen - addressed in versions 4.4.3-1.fc21, 4.4.3-3.fc21, 4.5.1-6.fc22, 4.5.1-6.fc23, 4.5.1-8.fc22
External References
- 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
Related Security Bulletins
- Permissions, Privileges, and Access Controls in Fedoraproject Fedora
- SUSE Linux update for xen
- Fedora 23 update for qemu
- Fedora 22 update for qemu
- Fedora 23 update for qemu
- Fedora 22 update for qemu
- Fedora 23 update for xen
- Fedora 22 update for xen
- Fedora 21 update for xen
- Fedora 22 update for xen
- Fedora 21 update for xen