NULL pointer dereference in QEMU - CVE-2016-6888
Published: December 10, 2016 / Updated: August 9, 2020
Vulnerability identifier: #VU39987
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-2016-6888
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: QEMU
Affected software:
QEMU
QEMU
Detailed vulnerability description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error. A remote attacker can trigger denial of service conditions via the maximum fragmentation count, which triggers an unchecked multiplication and NULL pointer dereference.
How to mitigate CVE-2016-6888
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.
Sources
- http://git.qemu.org/?p=qemu.git;a=commit;h=47882fa4975bf0b58dd74474329fdd7154e8f04c
- http://www.openwall.com/lists/oss-security/2016/08/19/10
- http://www.openwall.com/lists/oss-security/2016/08/19/6
- http://www.securityfocus.com/bid/92556
- https://access.redhat.com/errata/RHSA-2017:2392
- https://access.redhat.com/errata/RHSA-2017:2408
- https://lists.debian.org/debian-lts-announce/2018/11/msg00038.html
- https://lists.gnu.org/archive/html/qemu-devel/2016-08/msg03176.html
- https://security.gentoo.org/glsa/201609-01