Information disclosure in Apple Mac OS X
CVE-2016-4745
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.
Vulnerability class: Information Disclosure
EPSS: 0.018 (75.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
Affected products
- Apple Mac_os_x
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- product-security@apple.com (vdb-entry, x_refsource_SECTRACK)
- product-security@apple.com (vendor-advisory, x_refsource_APPLE, Mailing List, Vendor Advisory)
- product-security@apple.com (vdb-entry, x_refsource_BID)
- product-security@apple.com (x_refsource_CONFIRM, Vendor Advisory)
Frequently asked questions
- What is CVE-2016-4745?
- CVE-2016-4745 is a medium-severity vulnerability in Apple Mac OS X, classified under Information Disclosure. CVSS score: 5.3/10. Published 2016-09-25.
- How severe is CVE-2016-4745?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2016-4745 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.