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Centericq Empty Packet Handling Weakness and Buffer Overflows
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Secunia Advisory:
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SA17798
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Release Date:
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2005-11-30
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Last Update:
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2007-07-13
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Popularity:
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5,715 views
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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 remote
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Solution Status:
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Unpatched
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| Software: | Centericq 4.x
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Instant alerts on relevant vulnerabilities 
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| | CVE reference: | CVE-2005-3694
CVE-2005-3863
CVE-2007-3713
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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.
Do not edit contract details originating from non-trusted contacts.
Use another product.
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.
Changelog:
2005-12-22: Updated advisory with information of additional vulnerability.
2007-07-12: Added vulnerability #3, updated "Solution" section and added link to new advisory.
2007-07-13: Added CVE reference.
Original Advisory:
http://www.debian.org/security/2005/dsa-912
3) http://lists.grok.org.uk/pipermail/fu...20070710/98374694/attachment-0032.txt
Other References:
SA17768:
http://secunia.com/advisories/17768/
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About this Secunia Advisory
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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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