Gentoo Linux Security Advisory 201406-23 - A vulnerability in DenyHosts could allow a remote attacker to create a Denial of Service condition. Versions less than 2.6-r9 are affected.
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Debian Linux Security Advisory 2826-2 - A regression has been found on the denyhosts packages fixing CVE-2013-6890. This regression could cause an attempted breakin attempt to be missed by denyhosts, which would then fail to enforce a ban.
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Debian Linux Security Advisory 2826-1 - Helmut Grohne discovered that denyhosts, a tool preventing SSH brute-force attacks, could be used to perform remote denial of service against the SSH daemon. Incorrectly specified regular expressions used to detect brute force attacks in authentication logs could be exploited by a malicious user to forge crafted login names in order to make denyhosts ban arbitrary IP addresses.
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