Ubuntu 10.04 LTS / 12.04 LTS / 14.04 LTS : bash vulnerabilities (USN-2380-1) (Shellshock)
Critical Nessus Plugin ID 78260
SynopsisThe remote Ubuntu host is missing a security-related patch.
DescriptionMichal Zalewski discovered that Bash incorrectly handled parsing certain function definitions. If an attacker were able to create an environment variable containing a function definition with a very specific name, these issues could possibly be used to bypass certain environment restrictions and execute arbitrary code. (CVE-2014-6277, CVE-2014-6278)
Please note that the previous Bash security update, USN-2364-1, includes a hardening measure that prevents these issues from being used in a Shellshock attack.
Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
SolutionUpdate the affected bash package.