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ZNC Denial of Service Vulnerabilities

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Release Date:  2010-08-09    Last Update:  2010-08-12    Views:  2,699

Secunia Advisory SA40919

Where:

From remote

Impact:

DoS

Solution Status:

Vendor Workaround

Software:

CVE Reference(s):

Description


Some vulnerabilities have been reported in ZNC, which can be exploited by malicious users and malicious people to cause a DoS (Denial of Service).

The vulnerabilities are caused due to ZNC not correctly handling certain exceptions related to "substr()" calls, which can be exploited to crash ZNC by e.g. sending a "PING" command without parameters or connecting to a malicious IRC server.

The vulnerabilities are reported in version 0.092. Other versions may also be affected.


Solution:
Fixed in the SVN repository.

Provided and/or discovered by:
Reported within the PING handling by Sm0ke0ut. Additional information by the vendor.

Original Advisory:
http://znc.svn.sourceforge.net/viewvc/znc?view=revision&revision=2093
http://znc.svn.sourceforge.net/viewvc/znc?view=revision&revision=2095

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: ZNC Denial of Service Vulnerabilities

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