Vulnerability identifier: #VU77104

Vulnerability risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-2781

CWE-ID: CWE-20

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
coreutils
Other software / Other software solutions

Vendor: GNU

Description

The vulnerability allows a local user to escape to the parent session.

The vulnerability exists due in the chroot in GNU coreutils, when used with --userspec. A local user can escape to the parent session via a crafted TIOCSTI ioctl call, which pushes characters to the terminal's input buffer.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

coreutils: All versions

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External links
http://www.openwall.com/lists/oss-security/2016/02/28/2
http://www.openwall.com/lists/oss-security/2016/02/28/3
http://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772@%3Cdev.mina.apache.org%3E

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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.