============================================================================ Ubuntu Security Notice USN-2054-1 December 11, 2013 samba vulnerabilities ============================================================================ A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 13.10 - Ubuntu 13.04 - Ubuntu 12.10 - Ubuntu 12.04 LTS - Ubuntu 10.04 LTS Summary: Several security issues were fixed in Samba. Software Description: - samba: SMB/CIFS file, print, and login server for Unix Details: It was discovered that Winbind incorrectly handled invalid group names with the require_membership_of parameter. If an administrator used an invalid group name by mistake, access was granted instead of having the login fail. (CVE-2012-6150) Stefan Metzmacher and Michael Adam discovered that Samba incorrectly handled DCE-RPC fragment length fields. A remote attacker could use this issue to cause Samba to crash, resulting in a denial of service, or possibly execute arbitrary code as the root user. (CVE-2013-4408) Hemanth Thummala discovered that Samba incorrectly handled file permissions when vfs_streams_depot or vfs_streams_xattr were enabled. A remote attacker could use this issue to bypass intended restrictions. (CVE-2013-4475) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 13.10: libpam-winbind 2:3.6.18-1ubuntu3.1 samba 2:3.6.18-1ubuntu3.1 Ubuntu 13.04: libpam-winbind 2:3.6.9-1ubuntu1.2 samba 2:3.6.9-1ubuntu1.2 Ubuntu 12.10: libpam-winbind 2:3.6.6-3ubuntu5.3 samba 2:3.6.6-3ubuntu5.3 Ubuntu 12.04 LTS: libpam-winbind 2:3.6.3-2ubuntu2.9 samba 2:3.6.3-2ubuntu2.9 Ubuntu 10.04 LTS: samba 2:3.4.7~dfsg-1ubuntu3.13 winbind 2:3.4.7~dfsg-1ubuntu3.13 In general, a standard system update will make all the necessary changes. References: http://www.ubuntu.com/usn/usn-2054-1 CVE-2012-6150, CVE-2013-4408, CVE-2013-4475 Package Information: https://launchpad.net/ubuntu/+source/samba/2:3.6.18-1ubuntu3.1 https://launchpad.net/ubuntu/+source/samba/2:3.6.9-1ubuntu1.2 https://launchpad.net/ubuntu/+source/samba/2:3.6.6-3ubuntu5.3 https://launchpad.net/ubuntu/+source/samba/2:3.6.3-2ubuntu2.9 https://launchpad.net/ubuntu/+source/samba/2:3.4.7~dfsg-1ubuntu3.13