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Insecure Library Loading
Moderately critical

Samba Multiple Buffer Overflow Vulnerabilities

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Release Date:  2007-11-15    Views:  20,303

Secunia Advisory SA27450

Where:

From local network

Impact:

System access

Solution Status:

Vendor Patch

CVE Reference(s):

Description


Some vulnerabilities have been reported in Samba, which can be exploited by malicious people to compromise a vulnerable system.

1) A boundary error exists within the "reply_netbios_packet()" function in nmbd/nmbd_packets.c when sending NetBIOS replies. This can be exploited to cause a stack-based buffer overflow by sending multiple specially crafted WINS "Name Registration" requests followed by a WINS "Name Query" request.

Successful exploitation allows execution of arbitrary code, but requires that Samba is configured to run as a WINS server (the "wins support" option is enabled).

2) A boundary error exists within the processing of GETDC logon requests. This can be exploited to cause a buffer overflow by sending specially crafted GETDC mailslot requests.

Successful exploitation of the vulnerability requires that Samba is configured as a Primary or Backup Domain Controller.

The vulnerabilities are reported in version 3.0.26a. Other versions may also be affected.


Solution:
Apply patches or update to version 3.0.27.

Further details available to Secunia VIM customers

Provided and/or discovered by:
1) Alin Rad Pop, Secunia Research.
2) Reported by the vendor.

Original Advisory:
Secunia Research:
http://secunia.com/secunia_research/2007-90/

Samba:
http://us1.samba.org/samba/history/security.html

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: Samba Multiple Buffer Overflow Vulnerabilities

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