NULL pointer dereference in QEMU - CVE-2015-7549
Published: October 30, 2017 / Updated: August 8, 2020
Vulnerability identifier: #VU38001
CSH Severity: Medium
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:Green
CVE-ID: CVE-2015-7549
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 in hw/pci/msix.c in QEMU (aka Quick Emulator) allows local guest OS privileged users to cause a denial of service (NULL pointer dereference and QEMU process crash) by leveraging failure to define the .write method. A remote attacker can perform a denial of service (DoS) attack.
How to mitigate CVE-2015-7549
Update to version 2.5.0.
Sources
- http://git.qemu.org/?p=qemu.git;a=commit;h=43b11a91dd861a946b231b89b754285
- http://lists.fedoraproject.org/pipermail/package-announce/2016-January/175380.html
- http://www.debian.org/security/2016/dsa-3471
- http://www.openwall.com/lists/oss-security/2015/12/14/2
- http://www.securityfocus.com/bid/80761
- https://bugzilla.redhat.com/show_bug.cgi?id=1291137
- https://security.gentoo.org/glsa/201602-01