Improper input validation in Bash - CVE-2016-0634
Published: May 28, 2018 / Updated: May 31, 2018
Vulnerability identifier: #VU13103
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2016-0634
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: GNU
Affected software:
Bash
Bash
Detailed vulnerability description
The vulnerability allows a remote authenticated attacker to execute arbitrary code on the target system.
The vulnerability exists in the expansion of 'h' in the prompt string due to insufficient validation of user-supplied input. A remote attacker can place shell metacharacters in 'hostname' of a machine and execute arbitrary code with elevated privileges.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
How to mitigate CVE-2016-0634
Install update from vendor's website.