Published on 30/09/14 - Updated on 09/08/18
GNU Bash through 4.3 bash43-026 does not properly parse function definitions in the values of environment variables, which allows remote attackers to execute arbitrary commands via a crafted environment, 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. NOTE: this vulnerability exists because of an incomplete fix for CVE-2014-6271, CVE-2014-7169, and CVE-2014-6277.
CWE-78 (OS Command Injections)
The software constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.
|CERTFR-2014-AVI-415, CERTFR-2014-AVI-444, CERTFR-2014-AVI-480|
|ELSA-2014-3092, ELSA-2014-3093, ELSA-2014-3094|
|EDB-34860, EDB-34900, EDB-36933, EDB-39568, EDB-39887|