Two vulnerabilities have been reported in ngIRCd, which can be exploited by malicious people to cause a DoS (Denial of Service).
The vulnerabilities are caused due to the "Conn_StartLogin()" and "cb_Read_Resolver_Result()" functions (ngircd/conn.c) not properly checking the return value of the "Handle_Write()" function and can be exploited to cause crashes.
Successful exploitation of the vulnerabilities requires "NoticeAuth" configuration to be enabled (disabled by default).
The vulnerabilities are reported in versions prior to 20.3.
Solution: Update to version 20.3.
Provided and/or discovered by: Reported by the vendor.
Original Advisory: http://arthur.barton.de/pipermail/ngircd-ml/2013-August/000645.html
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Subject: ngIRCd "Handle_Write" Denial of Service Vulnerabilities
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