CVE-2016-4745 Information

Description

The Kerberos 5 (aka krb5) PAM module in Apple OS X before 10.12 does not use constant-time operations for determining username validity which makes it easier for remote attackers to enumerate user accounts via a timing side-channel attack.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Reference

http://lists.apple.com/archives/security-announce/2016/Sep/msg00006.html http://www.securityfocus.com/bid/93055 http://www.securitytracker.com/id/1036858 https://support.apple.com/HT207170

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

LOW

Availability Impact

NONE

Base Score

NONE

Base Severity

5.3