Heap-based buffer overflow in QEMU - CVE-2019-6778
Published: April 18, 2019
Vulnerability identifier: #VU18302
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2019-6778
CWE-ID: CWE-122
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: QEMU
Affected software:
QEMU
QEMU
Detailed vulnerability description
The vulnerability allows a local user to perform denial of service (DoS) attack.
The vulnerability exists due to a boundary error within the tcp_emu() function in slirp/tcp_subr.c. A local user can send specially crafted networking packets, trigger heap-based buffer overflow and crash the affected system.
How to mitigate CVE-2019-6778
Install updates from vendor's website.
Sources
- http://lists.opensuse.org/opensuse-security-announce/2019-02/msg00073.html
- http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00042.html
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00072.html
- http://www.openwall.com/lists/oss-security/2019/01/24/5
- http://www.securityfocus.com/bid/106758
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CGCFIFSIWUREEQQOZDZFBYKWZHXCWBZN/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KJMTVGDLA654HNCDGLCUEIP36SNJEKK7/
- https://lists.gnu.org/archive/html/qemu-devel/2019-01/msg03132.html
- https://usn.ubuntu.com/3923-1/