CVE-2015-6997

Description

The X.509 certificate-trust implementation in Apple iOS before 9.1 does not recognize that the kSecRevocationRequirePositiveResponse flag implies a revocation-checking requirement, which makes it easier for man-in-the-middle attackers to spoof endpoints by leveraging access to a revoked certificate.

Category

4.3
CVSS
Severity: Medium
CVSS 2.0 •
EPSS 0.29%
Vendor Advisory apple.com Vendor Advisory apple.com Vendor Advisory apple.com Vendor Advisory apple.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://lists.apple.com/archives/security-announce/2015/Oct/msg00002.html vendor advisory
http://lists.apple.com/archives/security-announce/2015/Dec/msg00002.html vendor advisory
https://support.apple.com/HT205370 vendor advisory
https://support.apple.com/HT205641 vendor advisory
http://www.securitytracker.com/id/1033929 vdb entry
http://www.securityfocus.com/bid/77268 vdb entry

Frequently Asked Questions

What is the severity of CVE-2015-6997?
CVE-2015-6997 has been scored as a medium severity vulnerability.
How to fix CVE-2015-6997?
To fix CVE-2015-6997, 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-2015-6997 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2015-6997 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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