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Security Release - Samba 3.0.5 and 2.2.10

Jul 22, 2004, 13:29 (0 Talkback[s])

[ Thanks to Gerald Carter for this release. ]

Summary: Potential Buffer Overruns in Samba 3.0 and Samba 2.2
CVE ID: CAN-2004-0600, CAN-2004-0686
(http://cve.mitre.org/)

CAN-2004-0600

Affected Versions: >= v3.0.2

The internal routine used by the Samba Web Administration Tool (SWAT v3.0.2 and later) to decode the base64 data during HTTP basic authentication is subject to a buffer overrun caused by an invalid base64 character. It is recommended that all Samba v3.0.2 or later installations running SWAT either (a) upgrade to v3.0.5, or (b) disable the swat administration service as a temporary workaround.

This same code is used internally to decode the sambaMungedDial attribute value when using the ldapsam passdb backend. While we do not believe that the base64 decoding routines used by the ldapsam passdb backend can be exploited, sites using an LDAP directory service with Samba are strongly encouraged to verify that the DIT only allows write access to sambaSamAccount attributes by a sufficiently authorized user.

The Samba Team would like to heartily thank Evgeny Demidov for analyzing and reporting this bug.

CAN-2004-0686

Affected Versions: >= v2.2.9, >= v3.0.0

A buffer overrun has been located in the code used to support the 'mangling method = hash' smb.conf option. Please be aware that the default setting for this parameter in Samba 3 is 'mangling method = hash2' and therefore not vulnerable.

Affected Samba installations can avoid this possible security bug by using the hash2 mangling method. Server installations requiring the hash mangling method are encouraged to upgrade to Samba 3.0.5 (or 2.2.10).


Samba 3.0.5 and 2.2.10 are identical to the previous release in each respective series with the exception of fixing these issues. Samba 3.0.5rc1 has been removed from the download area on Samba.org and 3.0.6rc2 will be available later this week.

The source code can be downloaded from :

http://download.samba.org/samba/ftp/

The uncompressed tarball and patch file have been signed using GnuPG. The Samba public key is available at

http://download.samba.org/samba/ftp/samba-pubkey.asc

Binary packages are available at

http://download.samba.org/samba/ftp/Binary_Packages/

The release notes are also available on-line at

http://www.samba.org/samba/whatsnew/samba-3.0.5.html
http://www.samba.org/samba/whatsnew/samba-2.2.10.html

Our code, Our bugs, Our responsibility. (Samba Bugzilla -- https://bugzilla.samba.org/)

-- The Samba Team