Published on 25/09/14 - Updated on 09/10/18
GNU Bash through 4.3 bash43-025 processes trailing strings after certain malformed function definitions in the values of environment variables, which allows remote attackers to write to files or possibly have unknown other impact 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.
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-403, CERTFR-2014-AVI-404, CERTFR-2014-AVI-405, CERTFR-2014-AVI-415, CERTFR-2014-AVI-436, CERTFR-2014-AVI-444, CERTFR-2014-AVI-480|
|ELSA-2014-1306, ELSA-2014-3075, ELSA-2014-3076, ELSA-2014-3077|
|2014/VULN206, 2014/VULN208, 2014/VULN209, 2014/VULN227, 2014/VULN239, 2015/VULN089|
|EDB-34765, EDB-34766, EDB-34777, EDB-34839, EDB-34860, EDB-34862, EDB-34879, EDB-34895, EDB-34896, EDB-35115, EDB-35146, EDB-36503, EDB-36504, EDB-36609, EDB-36933|