CVE-2016-4745
UnknownEPSS 1.76%
Last modified
CVE-2016-4745 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 1.76% chance of exploitation in the next 30 days.
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.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Apple | Mac Os X | <= 10.11.6 |
References
- http://lists.apple.com/archives/security-announce/2016/Sep/msg00006.htmlMailing List, Vendor Advisory
- https://support.apple.com/HT207170Vendor Advisory
- http://lists.apple.com/archives/security-announce/2016/Sep/msg00006.htmlMailing List, Vendor Advisory
- https://support.apple.com/HT207170Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is 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.
How severe is CVE-2016-4745?
Severity scoring for CVE-2016-4745 is pending analysis. The EPSS model estimates a 1.76% probability of exploitation in the next 30 days.
How do I fix CVE-2016-4745?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
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Are you affected by CVE-2016-4745?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST