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Insecure Library Loading
Moderately critical

Centericq Empty Packet Handling Weakness and Buffer Overflows

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Release Date:  2005-11-30    Last Update:  2007-07-13    Views:  9,441

Secunia Advisory SA17798

Where:

From remote

Impact:

DoS, System access

Solution Status:

Unpatched

Software:

CVE Reference(s):

Description


A weakness and some vulnerabilities have been reported in Centericq, which can be exploited by malicious people to cause a DoS (Denial of Service), and potentially to compromise a user's system.

1) The weakness is caused due to an error in the packet handling for peer to peer communications in the "DirectClient" class. This can be exploited to crash a vulnerable client by sending an empty packet to the listening port.

Successful exploitation requires that the setting "Enable peer-to-peer communications" has been enabled.

2) A boundary error exists in the ktools library used by Centericq. This can be exploited to caused a buffer overflow when the user edits specially crafted contact details retrieved from the messaging server.

For more information:
SA17768

3) Various boundary errors are reported in the IRC, Jabber, LiveJournal, and Yahoo hook, which potentially can be exploited to cause a buffer overflow and execute arbitrary code.

Successful exploitation may require that a user connects to malicious servers.

The weakness and vulnerabilities are reported in version 4.21.0. Other versions may also be affected.


Solution:
Disable the "Enable peer-to-peer communications" setting. This may however affect functionality.

Further details available to Secunia VIM customers

Provided and/or discovered by:
1) Wernfried Haas
2) Mehdi Oudad "deepfear" and Kevin Fernandez "Siegfried", Zone-H Research Team.
3) Nico Leidecker, Portcullis Computer Security Ltd.

Original Advisory:
http://www.debian.org/security/2005/dsa-912

3) http://lists.grok.org.uk/pipermail/full-disclosure/attachments/20070710/98374694/attachment-0032.txt

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: Centericq Empty Packet Handling Weakness and Buffer Overflows

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