It was found that the QEMU's websocket frame decoder processed incoming frames without limiting resources used to process the header and the payload. An attacker able to access a guest's VNC console could use this flaw to trigger a denial of service on the host by exhausting all available memory and CPU.
http://www.debian.org/security/2015/dsa-3259
https://lists.gnu.org/archive/html/qemu-devel/2015-03/msg04894.html
http://www.securitytracker.com/id/1033975
http://lists.opensuse.org/opensuse-security-announce/2015-05/msg00033.html
https://lists.gnu.org/archive/html/qemu-devel/2015-03/msg04896.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-April/155196.html
http://www.openwall.com/lists/oss-security/2015/03/24/9
http://www.ubuntu.com/usn/USN-2608-1
http://lists.fedoraproject.org/pipermail/package-announce/2015-April/154656.html
http://www.securityfocus.com/bid/73303
https://lists.gnu.org/archive/html/qemu-devel/2015-03/msg04895.html
http://rhn.redhat.com/errata/RHSA-2015-1943.html
http://rhn.redhat.com/errata/RHSA-2015-1931.html
http://www.openwall.com/lists/oss-security/2015/04/09/6
http://lists.opensuse.org/opensuse-security-announce/2015-05/msg00042.html
http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
https://security.gentoo.org/glsa/201602-01
https://access.redhat.com/errata/RHSA-2015:1943
https://access.redhat.com/errata/RHSA-2015:1931
Source: MITRE
Published: 2016-01-12
Updated: 2023-02-02
Type: CWE-400
Base Score: 7.8
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C
Impact Score: 6.9
Exploitability Score: 10
Severity: HIGH
Base Score: 8.6
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Impact Score: 4
Exploitability Score: 3.9
Severity: HIGH