Vulnerability identifier: #VU5322
Vulnerability risk: Critical
Exploitation vector: Network
Exploit availability: Yes
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The weakness exists due to an incomplete fix related to the parsing of user scripts. By using attack vectors involving the ForceCommand feature in OpenSSH sshd, the mod_cgi and mod_cgid modules in the Apache HTTP Server, a remote attacker can execute arbitrary code with privileges of the current user. The vulnerability was introduced by incorrect patching of vulnerabilities #1 (CVE-2014-6271), #2 (CVE-2014-7169) and #3 (CVE-2014-6277)
Successful exploitation results in arbitrary code execution on the vulnerable system.
Note: this vulnerability was being actively exploited.
Update GNU Bash to version 4.3 bash43-027.
Vulnerable software versions
Bash: 1.14.0 - 4.3
Can this vulnerability be exploited remotely?
Is there known malware, which exploits this vulnerability?