PopMessenger versions 1.60 and below are susceptible to a denial of service attack when attempting to create a dialog with illegal characters.
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Debian Security Advisory DSA 551-1 - An attacker could utilize a vulnerability in tnftpd or lukemftpd to execute arbitrary code on the server.
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White paper discussing SQL injection attacks from different angles.
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jabberd up to and including version 1.4.3 and jadc2s up to and including version 0.9.0 are vulnerable against a DoS attack.
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