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Samba Denial of Service and Format String Vulnerability
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Secunia Advisory:
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SA24046
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Release Date:
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2007-02-06
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Last Update:
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2007-02-08
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Critical:
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Moderately critical
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Impact:
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DoS
System access
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Where:
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From local network
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Solution Status:
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Vendor Patch
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| Software: | Samba 3.x
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| | 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
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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.
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