Vulnerability identifier: #VU21785

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-2019-9924

CWE-ID: CWE-20

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Bash
Universal components / Libraries / Scripting languages

Vendor: GNU

Description

The vulnerability allows a local user to execute arbitrary code.

The vulnerability exists due to "rbash" does not prevent the shell user from modifying BASH_CMDS. A local authenticate user can execute any command with the permissions of the shell.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Bash: 4.0 - 4.3

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External links
http://git.savannah.gnu.org/cgit/bash.git/tree/CHANGES?h=bash-4.4-testing#n65
http://security.netapp.com/advisory/ntap-20190411-0001/

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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.