Squid before 2.3STABLE5 in HTTP accelerator mode does not enable access control lists (ACLs) when the httpdaccelhost and httpaccelwithproxy off settings are used, which allows attackers to bypass the ACLs and conduct unauthorized activities such as port scanning.

docview before 1.0-15 allows remote attackers to execute arbitrary commands via shell metacharacters that are processed when converting a man page to a web page.

Linux kernel 2.0, 2.2 and 2.4 with syncookies enabled allows remote attackers to bypass firewall rules by brute force guessing the cookie.

Preboot eXecution Environment (PXE) server allows remote attackers to cause a denial of service (crash) via certain DHCP packets from Voice-Over-IP (VOIP) phones.

Vulnerability in the MIT-SHM extension of the X server on Linux (XFree86) 4.2.1 and earlier allows local users to read and write arbitrary shared memory, possibly to cause a denial of service or gain privileges.

Heap corruption vulnerability in the "at" program allows local users to execute arbitrary code via a malformed execution time, which causes at to free the same memory twice.