Referenced CVEs:
CVE-2010-0926
Description:
=========================================================== Ubuntu Security Notice USN-918-1 March 24, 2010 samba vulnerability CVE-2010-0926 =========================================================== A security issue affects the following Ubuntu releases: Ubuntu 6.06 LTS Ubuntu 8.04 LTS Ubuntu 8.10 Ubuntu 9.04 Ubuntu 9.10 This advisory also applies to the corresponding versions of Kubuntu, Edubuntu, and Xubuntu. The problem can be corrected by upgrading your system to the following package versions: Ubuntu 6.06 LTS: samba 3.0.22-1ubuntu3.11 Ubuntu 8.04 LTS: samba 3.0.28a-1ubuntu4.11 Ubuntu 8.10: samba 2:3.2.3-1ubuntu3.8 Ubuntu 9.04: samba 2:3.3.2-1ubuntu3.4 Ubuntu 9.10: samba 2:3.4.0-3ubuntu5.6 In general, a standard system upgrade is sufficient to effect the necessary changes. ATTENTION: This update changes the default samba behaviour. For security reasons, it is no longer possible to use wide links and UNIX extensions at the same time. After applying this security update, wide links will be disabled automatically as UNIX extensions are turned on by default. If wide links are required, you can re-enable them by adding "unix extensions = no" to the [global] section of the /etc/samba/smb.conf configuration file. Details follow: It was discovered the Samba handled symlinks in an unexpected way when both "wide links" and "UNIX extensions" were enabled, which is the default. A remote attacker could create symlinks and access arbitrary files from the server.
More...
