Vulnerability identifier: #VU39729

Vulnerability risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-2779

CWE-ID: CWE-264

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Util-linux
Universal components / Libraries / Libraries used by multiple products

Vendor: kernel.org

Description

The vulnerability allows a local authenticated user to execute arbitrary code.

runuser in util-linux allows local users to escape to the parent session via a crafted TIOCSTI ioctl call, which pushes characters to the terminal's input buffer.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Util-linux: 2.24.2-1

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External links
http://www.openwall.com/lists/oss-security/2016/02/27/1
http://www.openwall.com/lists/oss-security/2016/02/27/2
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=815922

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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.