SynopsisThe remote Ubuntu host is missing a security-related patch.
DescriptionFlorian Weimer and Todd Sabin discovered that the Bash parser incorrectly handled memory. An attacker could possibly use this issue to bypass certain environment restrictions and execute arbitrary code.
In addition, this update introduces a hardening measure which adds prefixes and suffixes around environment variable names which contain shell functions.
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.