#VU32235 Out-of-bounds read in libXtst - CVE-2016-7951

Vulnerability identifier: #VU32235

Vulnerability risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2016-7951

CWE-ID: CWE-125

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
libXtst
Operating systems & Components / Operating system package or component

Vendor: xorg.freedesktop.org

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

Multiple integer overflows in X.org libXtst before 1.2.3 allow remote X servers to trigger out-of-bounds memory access operations by leveraging the lack of range checks.

Mitigation
Install update from vendor's website.

Vulnerable software versions

libXtst: 1.2.0 - 1.2.2

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External links
https://www.openwall.com/lists/oss-security/2016/10/04/2
https://www.openwall.com/lists/oss-security/2016/10/04/4
https://www.securityfocus.com/bid/93370
https://www.securitytracker.com/id/1036945
https://cgit.freedesktop.org/xorg/lib/libXtst/commit/?id=9556ad67af3129ec4a7a4f4b54a0d59701beeae3
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AFLHX7WNEUXXDAGR324T35L5P6RRR7GE/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RVEUZRHYY3AJEKMFQ4DS7DX3Y2AICFP7/
https://lists.x.org/archives/xorg-announce/2016-October/002720.html

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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.