Out-of-bounds read in QEMU - CVE-2016-9104
Published: December 10, 2016 / Updated: July 28, 2020
Vulnerability identifier: #VU32088
CSH Severity: Low
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-2016-9104
CWE-ID: CWE-125
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.
Multiple integer overflows in the (1) v9fs_xattr_read and (2) v9fs_xattr_write functions in hw/9pfs/9p.c in QEMU (aka Quick Emulator) allow local guest OS administrators to cause a denial of service (QEMU process crash) via a crafted offset, which triggers an out-of-bounds access.
Affected software
QEMU
qemu (Alpine package)
xen
Fedora
qemu (Alpine package)
xen
Fedora
How to mitigate CVE-2016-9104
Install update from vendor's website.
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://lists.opensuse.org/opensuse-updates/2016-12/msg00140.html
- http://www.openwall.com/lists/oss-security/2016/10/28/2
- http://www.openwall.com/lists/oss-security/2016/10/30/8
- http://www.securityfocus.com/bid/93956
- https://lists.debian.org/debian-lts-announce/2018/11/msg00038.html
- https://lists.gnu.org/archive/html/qemu-devel/2016-10/msg02942.html
- https://security.gentoo.org/glsa/201611-11