Ubuntu 12.04 LTS / 14.04 LTS / 16.04 LTS / 16.10 : samba vulnerabilities (USN-3158-1)
Medium Nessus Plugin ID 95949
SynopsisThe remote Ubuntu host is missing one or more security-related patches.
DescriptionFrederic Besler and others discovered that the ndr_pull_dnsp_nam function in Samba contained an integer overflow. An authenticated attacker could use this to gain administrative privileges. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, and Ubuntu 16.10.
Simo Sorce discovered that that Samba clients always requested a forwardable ticket when using Kerberos authentication. An attacker could use this to impersonate an authenticated user or service.
Volker Lendecke discovered that Kerberos PAC validation implementation in Samba contained multiple vulnerabilities. An authenticated attacker could use this to cause a denial of service or gain administrative privileges. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, and Ubuntu 16.10. (CVE-2016-2126).
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 libsmbclient, samba and / or winbind packages.