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Samba Denial of Service and Format String Vulnerability Advisory Available in Danish  Advisory Available in German 

Secunia Advisory: SA24046  
Release Date: 2007-02-06
Last Update: 2007-02-08

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

Software:Samba 3.x

CVE reference:CVE-2007-0452 (Secunia mirror)
CVE-2007-0454 (Secunia mirror)

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Description:
Some vulnerabilities have been reported in Samba, which can be exploited by malicious users to cause a DoS (Denial of Service) or potentially compromise a vulnerable system.

1) Under certain conditions, smbd fails to remove requests from the deferred file open queue. This can be exploited to cause a DoS due to heavy resource usage by triggering an infinite loop when renaming a file under special circumstances.

2) Samba uses filenames as format string parameter in a call to "sprintf()" when setting Windows NT Access Control Lists using the afsacl.so VFS plugin. This can potentially be exploited to execute arbitrary code.

Successful exploitation requires that an AFS file system is shared to CIFS clients using the afsacl.so VFS module and that the attacker has write access to the share.

Solution:
Update to version 3.0.24.

Provided and/or discovered by:
1) Reported by the vendor.
2) The vendor credits zybadawg333.

Changelog:
2007-02-08: Added link to US-CERT.

Original Advisory:
http://us1.samba.org/samba/security/CVE-2007-0452.html
http://us1.samba.org/samba/security/CVE-2007-0454.html

Other References:
US-CERT VU#649732:
http://www.kb.cert.org/vuls/id/649732



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.

15 Related Secunia Security Advisories, displaying 10

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2. Samba "send_mailslot()" Buffer Overflow Vulnerability
3. Samba Multiple Buffer Overflow Vulnerabilities
4. Samba "winbind nss info" Privilege Escalation Security Issue
5. Samba Multiple Vulnerabilities
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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