#VU32432 Resource management error in QEMU - CVE-2015-1779

Vulnerability identifier: #VU32432

Vulnerability risk: High

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2015-1779

CWE-ID: CWE-399

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
QEMU
Client/Desktop applications / Virtualization software

Vendor: QEMU

Description

The vulnerability allows a remote non-authenticated attacker to a crash the entire system.

The VNC websocket frame decoder in QEMU allows remote attackers to cause a denial of service (memory and CPU consumption) via a large (1) websocket payload or (2) HTTP headers section.

Mitigation
Install update from vendor's website.

Vulnerable software versions

QEMU: 3.1.3

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External links
https://lists.fedoraproject.org/pipermail/package-announce/2015-April/154656.html
https://lists.fedoraproject.org/pipermail/package-announce/2015-April/155196.html
https://lists.opensuse.org/opensuse-security-announce/2015-05/msg00033.html
https://lists.opensuse.org/opensuse-security-announce/2015-05/msg00042.html
https://rhn.redhat.com/errata/RHSA-2015-1931.html
https://rhn.redhat.com/errata/RHSA-2015-1943.html
https://www.debian.org/security/2015/dsa-3259
https://www.openwall.com/lists/oss-security/2015/03/24/9
https://www.openwall.com/lists/oss-security/2015/04/09/6
https://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
https://www.securityfocus.com/bid/73303
https://www.securitytracker.com/id/1033975
https://www.ubuntu.com/usn/USN-2608-1
https://lists.gnu.org/archive/html/qemu-devel/2015-03/msg04894.html
https://lists.gnu.org/archive/html/qemu-devel/2015-03/msg04895.html
https://lists.gnu.org/archive/html/qemu-devel/2015-03/msg04896.html
https://security.gentoo.org/glsa/201602-01

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.