CVE-2016-4745

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.

Category

5.3
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.50%
Vendor Advisory apple.com Vendor Advisory apple.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://www.securitytracker.com/id/1036858 vdb entry
http://lists.apple.com/archives/security-announce/2016/Sep/msg00006.html mailing list vendor advisory
http://www.securityfocus.com/bid/93055 vdb entry
https://support.apple.com/HT207170 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2016-4745?
CVE-2016-4745 has been scored as a medium severity vulnerability.
How to fix CVE-2016-4745?
To fix CVE-2016-4745, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2016-4745 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2016-4745 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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