Kadu 0.4.2 and 0.5.0pre allows remote attackers to cause a denial of service (crash or generated traffic) via a malformed message, possibly with incomplete information.
Multiple integer overflows in libgadu, as used in Kopete in KDE 3.2.3 to 3.4.1, ekg before 1.6rc3, GNU Gadu, CenterICQ, Kadu, and other packages, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via an incoming message.