Heap-based buffer overflow in the AppleTalk networking stack in XNU 1228.3.13 and earlier on Apple Mac OS X 10.5.6 and earlier allows remote attackers to cause a denial of service (system crash) via a ZIP NOTIFY (aka ZIPOP_NOTIFY) packet that overwrites a certain ifPort structure member.

Integer overflow in the inet_net_pton API in Libsystem in Apple Mac OS X before 10.5.6 allows context-dependent attackers to execute arbitrary code or cause a denial of service (application crash) via unspecified vectors. NOTE: this may be related to the WLB-2008080064 advisory published by SecurityReason on 20080822; however, as of 20081216, there are insufficient details to be sure.

Multiple integer overflows in the kernel in Apple Mac OS X before 10.5.6 on Intel platforms allow local users to gain privileges via a crafted call to (1) i386_set_ldt or (2) i386_get_ldt.

Incomplete blacklist vulnerability in the Quarantine feature in CoreTypes in Apple Mac OS X 10.5 before 10.5.6 allows user-assisted remote attackers to execute arbitrary code via an executable file with the content type indicating no application association for the file, which does not trigger a "potentially unsafe" warning message.

The strptime API in Libsystem in Apple Mac OS X before 10.5.6 allows context-dependent attackers to cause a denial of service (memory corruption and application crash) or execute arbitrary code via a crafted date string, related to improper memory allocation.

natd in network_cmds in Apple Mac OS X before 10.5.6, when Internet Sharing is enabled, allows remote attackers to cause a denial of service (infinite loop) via a crafted TCP packet.

Apple Type Services (ATS) in Apple Mac OS X 10.5 before 10.5.6 allows remote attackers to cause a denial of service (infinite loop) via a crafted embedded font in a PDF file.

The kernel in Apple Mac OS X before 10.5.6 allows local users to cause a denial of service (infinite loop and system halt) by running an application that is dynamically linked to libraries on an NFS server, related to occurrence of an exception in this application.

UDF in Apple Mac OS X before 10.5.6 allows user-assisted attackers to cause a denial of service (system crash) via a malformed UDF volume in a crafted ISO file.

Managed Client in Apple Mac OS X before 10.5.6 sometimes misidentifies a system when installing per-host configuration settings, which allows context-dependent attackers to have an unspecified impact by leveraging unintended settings, as demonstrated by the screen saver lock setting.