The default configuration of the POP server in TCP/IP Services 5.6 for HP OpenVMS 8.3 generates different responses depending on whether or not a username is valid, which allows remote attackers to enumerate valid POP usernames.

Buffer overflow in lib/silcclient/client_notify.c of SILC Client and SILC Toolkit before 1.1.2 allows remote attackers to cause a denial of service via “NICK_CHANGE” notifications.

Multiple unspecified vulnerabilities in Webmatic before 2.7 have unknown impact and attack vectors, related to the “administration area.”

The RAR VM (unrarvm.c) in Clam Antivirus (ClamAV) before 0.91 allows user-assisted remote attackers to cause a denial of service (crash) via a crafted RAR archive, resulting in a NULL pointer dereference.

The process scheduler in the Microsoft Windows XP kernel does not make use of the process statistics kept by the kernel, performs scheduling based on CPU billing gathered from periodic process sampling ticks, and gives preference to “interactive” processes that perform voluntary sleeps, which allows local users to cause a denial of service (CPU consumption), as described in “Secretly Monopolizing the CPU Without Superuser Privileges.”