CVE-2017-7562

Description

An authentication bypass flaw was found in the way krb5's certauth interface before 1.16.1 handled the validation of client certificates. A remote attacker able to communicate with the KDC could potentially use this flaw to impersonate arbitrary principals under rare and erroneous circumstances.

Category

6.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.27%
Vendor Advisory redhat.com
Affected: MIT krb5
Published at:
Updated at:

References

Link Tags
https://github.com/krb5/krb5/pull/694/commits/50fe4074f188c2d4da0c421e96553acea8378db2 third party advisory
http://www.securityfocus.com/bid/100511 vdb entry third party advisory
https://github.com/krb5/krb5/pull/694/commits/1de6ca2f2eb1fdbab51f1549a25a6903aefcc196 third party advisory
https://github.com/krb5/krb5/pull/694 third party advisory patch
https://access.redhat.com/errata/RHSA-2018:0666 third party advisory vendor advisory
https://github.com/krb5/krb5/pull/694/commits/b7af544e50a4d8291524f590e20dd44430bf627d third party advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7562 issue tracking third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2017-7562?
CVE-2017-7562 has been scored as a medium severity vulnerability.
How to fix CVE-2017-7562?
To fix CVE-2017-7562, 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-2017-7562 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2017-7562 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.
What software or system is affected by CVE-2017-7562?
CVE-2017-7562 affects MIT krb5.
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