#VU13104 Command injection in Bash


Published: 2018-05-28 | Updated: 2018-05-31

Vulnerability identifier: #VU13104

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-2016-7543

CWE-ID: CWE-77

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Bash
Universal components / Libraries / Scripting languages

Vendor: GNU

Description
The vulnerability allows a local attacker to execute arbitrary commands on the target system.

The weakness exists due to insufficient validation of user-supplied input. A local attacker can supply specially crafted SHELLOPTS and PS4 environment variables, inject and execute arbitrary commands with root privileges.

Mitigation
Update to version 4.4.

Vulnerable software versions

Bash: 1.14.0 - 4.3


External links
http://lists.gnu.org/archive/html/bug-bash/2016-09/msg00018.html


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.


Latest bulletins with this vulnerability