CVE-2016-4745

MEDIUM

macOS < 10.12 - User Account Enumeration via Kerberos PAM Timing Side-Channel

Title source: llm
STIX 2.1

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)

Core 4
Core References
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id/1036858
Mailing List, Vendor Advisory vendor-advisory x_refsource_apple
http://lists.apple.com/archives/security-announce/2016/Sep/msg00006.html
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/93055
Vendor Advisory x_refsource_confirm
https://support.apple.com/HT207170

Scores

CVSS v3 5.3
EPSS 0.0176
EPSS Percentile 75.3%
Attack Vector NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Details

CWE
CWE-200
Status published
Products (1)
apple/mac_os_x < 10.11.6
Published Sep 25, 2016
Tracked Since Feb 18, 2026