CVE-2016-4745

5.3 mediumEPSS 1.8%

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.

Severity

CVSS 3.0

5.3 medium

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

EPSS: 1.8% chance of exploitation in the next 30 days; higher than 77% of CVEs (scores of 2026-10-31)
CWE: CWE-200
Published: 2016-09-25
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

apple:mac_os_x

References

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
http://lists.apple.com/archives/security-announce/2016/Sep/msg00006.html

Check your stack JSON