SB2014092803 - openSUSE update for bash

Description

This security bulletin contains information about 1 security vulnerability.

1) Command injection (CVE-ID: CVE-2014-6271)

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

The vulnerability exists due to incorrect parsing of environment variables. A remote attacker can 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.

Successful exploitation may allow an attacker to gain complete control over vulnerable system.

Exploitation example:

env x='() { :;}; echo vulnerable' bash -c "echo this is a test"

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

Remediation

Install update from vendor's website.

References

• https://lists.opensuse.org/opensuse-security-announce/2014-09/msg00040.html