Ubuntu 9.10 / 10.04 LTS / 10.10 : shadow vulnerability (USN-1065-1)
Medium Nessus Plugin ID 51997
SynopsisThe remote Ubuntu host is missing one or more security-related patches.
DescriptionKees Cook discovered that some shadow utilities did not correctly validate user input. A local attacker could exploit this flaw to inject newlines into the /etc/passwd file. If the system was configured to use NIS, this could lead to existing NIS groups or users gaining or losing access to the system, resulting in a denial of service or unauthorized access.
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 login and / or passwd packages.