Memory leak in QEMU - CVE-2016-9102
Published: December 10, 2016 / Updated: July 28, 2020
Vulnerability identifier: #VU32079
CSH Severity: Medium
CVSS v4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2016-9102
CWE-ID: CWE-401
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to memory leak within the v9fs_xattrcreate function in hw/9pfs/9p.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (memory consumption and QEMU process crash) via a large number of Txattrcreate messages with the same fid number. A remote attacker can perform a denial of service attack.
Affected software
QEMU
qemu (Alpine package)
xen
Fedora
qemu (Alpine package)
xen
Fedora
How to mitigate CVE-2016-9102
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.
qemu (Alpine package) - addressed in versions 2.8.1-r1, 2.8.1.1-r0
xen - addressed in versions 4.5.5-3.fc23, 4.6.3-7.fc24, 4.7.0-7.fc25
xen - addressed in versions 4.5.5-3.fc23, 4.6.3-7.fc24, 4.7.0-7.fc25
External References
- http://git.qemu.org/?p=qemu.git;a=commit;h=ff55e94d23ae94c8628b0115320157c763eb3e06
- http://www.openwall.com/lists/oss-security/2016/10/27/15
- http://www.openwall.com/lists/oss-security/2016/10/30/6
- http://www.securityfocus.com/bid/93962
- https://lists.debian.org/debian-lts-announce/2018/11/msg00038.html
- https://lists.gnu.org/archive/html/qemu-devel/2016-10/msg01861.html
- https://security.gentoo.org/glsa/201611-11