Multiple implementations of the DNS protocol, including (1) Poslib 1.0.2-1 and earlier as used by Posadis, (2) Axis Network products before firmware 3.13, and (3) Men & Mice Suite 2.2x before 2.2.3 and 3.5.x before 3.5.2, allow remote attackers to cause a denial of service (CPU and network bandwidth consumption) by triggering a communications loop via (a) DNS query packets with localhost as a spoofed source address, or (b) a response packet that triggers a response packet.

Posadis 0.50.4 through 0.50.8 allows remote attackers to cause a denial of service (crash) via a DNS message without a question section, which triggers null dereference.

Format string vulnerability in logprint() function of Posadis DNS server before version m5pre2 allows local users and possibly remote attackers to execute arbitrary code via format strings that are inserted into logging messages.