Buffer overflow in QEMU - CVE-2016-6835
Published: December 10, 2016 / Updated: August 9, 2020
Vulnerability identifier: #VU39989
CSH Severity: Low
CVSS v4.0: 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/E:U/U:Clear
CVE-ID: CVE-2016-6835
CWE-ID: CWE-119
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: QEMU
Affected software:
QEMU
QEMU
Detailed vulnerability description
The vulnerability allows a local privileged user to a crash the entire system.
The vmxnet_tx_pkt_parse_headers function in hw/net/vmxnet_tx_pkt.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (buffer over-read) by leveraging failure to check IP header length.
How to mitigate CVE-2016-6835
Install update from vendor's website.
Sources
- http://git.qemu.org/?p=qemu.git;a=commit;h=93060258ae748573ca7197204125a2670047896d
- http://www.openwall.com/lists/oss-security/2016/08/11/7
- http://www.openwall.com/lists/oss-security/2016/08/18/4
- https://access.redhat.com/errata/RHSA-2017:2392
- https://lists.debian.org/debian-lts-announce/2018/09/msg00007.html
- https://lists.gnu.org/archive/html/qemu-stable/2016-08/msg00077.html