Multiple unspecified vulnerabilities in ZNC 0.092 allow remote attackers to cause a denial of service (exception and daemon crash) via unknown vectors related to "unsafe substr() calls."

An out-of-range flaw was found in znc where if it received a "PING" from a client without an argument, std::string would throw a std::outofrange exception which killed znc. This is fixed in subversion [1].

Some unsafe substr() calls were fixed as well. These are of lesser impact because a valid login is required in order to cause a std::outofrange exception. This is also fixed in subversion [2].

[1] http://znc.svn.sourceforge.net/viewvc/znc?view=revision&revision=2093 [2] http://znc.svn.sourceforge.net/viewvc/znc?view=revision&revision=2095