#VU5310 Memory corruption in Bash - CVE-2014-6277

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Main Vulnerability Database Vulnerabilities #VU5310

#VU5310 Memory corruption in Bash - CVE-2014-6277

Published: January 24, 2017 / Updated: March 11, 2017


Vulnerability identifier: #VU5310
Vulnerability risk: Critical
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Red
CVE-ID: CVE-2014-6277
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability: Public exploit is available
Vulnerable software:
Bash
Software vendor:
GNU

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to incorrect parsing of environment variables. A remote attacker can trigger memory corruption and execute arbitrary code on the target system as demonstrated by vectors involving the ForceCommand feature in OpenSSH sshd, the mod_cgi and mod_cgid modules in the Apache HTTP Server, scripts executed by unspecified DHCP clients, and other situations in which setting the environment occurs across a privilege boundary from Bash execution. The vulnerability was introduced by incorrect patching of vulnerabilities #1 (CVE-2014-6271) and #2 (CVE-2014-7169).

Successful exploitation results in arbitrary code execution on the vulnerable system.

Note: this vulnerability was being actively exploited in the wild.


Remediation

Update GNU Bash to version 4.3 bash43-027.

External links