CVE-2016-4745

MEDIUM

Apple Mac OS X < 10.11.6 - Information Disclosure

Title source: rule

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.

References (4)

[Mailing List, Vendor Advisory] http://lists.apple.com/archives/security-announce/2016/Sep/msg00006.html

[Third Party Advisory, VDB Entry] http://www.securitytracker.com/id/1036858

[Vendor Advisory] https://support.apple.com/HT207170

[Third Party Advisory, VDB Entry] http://www.securityfocus.com/bid/93055

Scores

CVSS v3 5.3

EPSS 0.0041

EPSS Percentile 60.7%

Attack Vector NETWORK

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

Classification

CWE

CWE-200

Status published

Affected Products (2)

apple/mac_os_x < 10.11.6

n/a/n/a

Timeline

Published Sep 25, 2016

Tracked Since Feb 18, 2026