Ragnar Sundblad

**Name of the Vulnerable Software and Affected Versions** Apple OS X versions prior to 10.10 **Description** The issue allows remote attackers to cause a denial of service, specifically a NULL pointer dereference, by sending crafted ASN.1 data. **Recommendations** For Apple OS X versions prior to 10.10, update to version 10.10 or later to resolve the issue.

**Name of the Vulnerable Software and Affected Versions** Apple OS X versions prior to 10.10 **Description** The issue concerns a problem where SecurityAgent in Apple OS X does not properly verify that a Kerberos ticket is associated with the correct user. This can be exploited by local users in specific situations, such as when Fast User Switching is used, allowing them to gain elevated privileges. **Recommendations** For Apple OS X versions prior to 10.10, update to version 10.10 or later to resolve the issue.

**Name of the Vulnerable Software and Affected Versions** Apple Mac OS X version 10.4.11 **Description** The issue allows remote attackers to bypass cross-realm authentication via manipulations of Kerberos principal realm names. **Recommendations** For Apple Mac OS X version 10.4.11, at the moment, there is no information about a newer version that contains a fix for this vulnerability.

**Name of the Vulnerable Software and Affected Versions** Apple Mac OS X versions 10.4 through 10.4.7 **Description** The issue allows local users to gain access to Kerberos tickets of other users when Fast User Switching is enabled. This could potentially lead to unauthorized access. **Recommendations** For Apple Mac OS X versions 10.4 through 10.4.7, consider disabling Fast User Switching as a temporary workaround to minimize the risk of exploitation.

**Name of the Vulnerable Software and Affected Versions** Apple Mac OS X versions 10.4 through 10.4.7 **Description** A logic error in the LoginWindow component allows network accounts without GUIDs to bypass service access controls, enabling unauthorized login to the system. This issue can be exploited via unknown vectors in the loginwindow. **Recommendations** For Apple Mac OS X versions 10.4 through 10.4.7, update to a version later than 10.4.7 to resolve the issue.