#VU2053 Privilege escalation in OpenSSH - CVE-2016-10010

Vulnerability identifier: #VU2053

Vulnerability risk: Low

CVSSv4.0: 7.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2016-10010

CWE-ID: CWE-264

Exploitation vector: Local

Exploit availability: Yes

Vulnerable software:
OpenSSH
Server applications / Remote management servers, RDP, SSH

Vendor: OpenSSH

Description
The vulnerability allows a local user to execute arbitrary code on vulnerable system with root privileges.

The vulnerability exists due to an error in sshd in serverloop.c, which may allow a local authenticated user to execute arbitrary code with root privileges via a forwarded Unix-domain socket.

Successful exploitation of this vulnerability may allow a local user to elevate privileges.

Mitigation
Install the latest version of OpenSSH 7.4.

Vulnerable software versions

OpenSSH: 7.3p1

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External links
https://www.openssh.com/txt/release-7.4
https://www.openwall.com/lists/oss-security/2016/12/19/2
https://github.com/openbsd/src/commit/c76fac666ea038753294f2ac94d310f8adece9ce

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.