SB2017103015 - NULL pointer dereference in QEMU
Published: October 30, 2017 Updated: August 8, 2020
Security Bulletin ID
SB2017103015
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) NULL pointer dereference (CVE-ID: CVE-2015-7549)
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.
Remediation
Install update from vendor's website.
References
- 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