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Samba "send_mailslot()" Buffer Overflow Vulnerability Advisory Available in Danish  Advisory Available in German 

Secunia Advisory: SA27760  
Release Date: 2007-12-10
Last Update: 2008-02-21

Critical:
Moderately critical
Impact: System access
Where: From local network
Solution Status: Vendor Patch

Software:Samba 2.x
Samba 3.x

CVE reference:CVE-2007-6015 (Secunia mirror)

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Description:
Secunia Research has discovered a vulnerability in Samba, which can be exploited by malicious people to compromise a vulnerable system.

The vulnerability is caused due to a boundary error within the "send_mailslot()" function. This can be exploited to cause a stack-based buffer overflow with zero bytes via a specially crafted "SAMLOGON" domain logon packet containing a username string placed at an odd offset followed by an overly long GETDC string.

Successful exploitation allows execution of arbitrary code, but requires that the "domain logons" option is enabled.

The vulnerability is confirmed in version 3.0.27a. Prior versions may also be affected.

Solution:
Update to version 3.0.28 or apply patch.

Patch for Samba 3.0.27a:
http://us3.samba.org/samba/ftp/patche...ity/samba-3.0.27a-CVE-2007-6015.patch

Provided and/or discovered by:
Alin Rad Pop, Secunia Research.

Changelog:
2007-12-10: Updated "Solution" section.
2008-02-21: Added link to US-CERT.

Original Advisory:
Secunia Research:
http://secunia.com/secunia_research/2007-99/

Samba:
http://us3.samba.org/samba/security/CVE-2007-6015.html

Other References:
US-CERT VU#438395:
http://www.kb.cert.org/vuls/id/438395

Extended Solution:
The "Extended Solution" section is available for Secunia customers only. Request a trial and get access to the Secunia Customer Area and Extended Secunia advisories.



Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.

Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.

17 Related Secunia Security Advisories, displaying 10

1. Samba "receive_smb_raw()" Buffer Overflow Vulnerability
2. Samba Multiple Buffer Overflow Vulnerabilities
3. Samba "winbind nss info" Privilege Escalation Security Issue
4. Samba Multiple Vulnerabilities
5. Samba Denial of Service and Format String Vulnerability
6. Samba Winbind Library Buffer Overflow Vulnerabilities
7. Samba Multiple Share Connection Requests Denial of Service
8. Samba Exposure of Machine Account Credentials
9. Samba Security Descriptor Parsing Integer Overflow Vulnerability
10. Samba QFILEPATHINFO Request Handler Buffer Overflow Vulnerability

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