Apple » Mac Os X : Security Vulnerabilities, CVEs, Published In December 2007 (Bypass)

Java in Mac OS X 10.4 through 10.4.11 allows remote attackers to bypass Keychain access controls and add or delete arbitrary Keychain items via a crafted Java applet.

Mail in Apple Mac OS X 10.4.11 and 10.5.1, when an SMTP account has been set up using Account Assistant, can use plaintext authentication even when MD5 Challenge-Response authentication is available, which makes it easier for remote attackers to sniff account activity.