CVE-2017-7562

MediumCVSS 6.5/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Weakness enumeration

CWE-287 CWE-295

Affected software

Vendor	Product	Versions
MIT	krb5	1.16.1

References

http://www.securityfocus.com/bid/100511Third Party Advisory, VDB Entry
https://access.redhat.com/errata/RHSA-2018:0666Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7562Issue Tracking, Patch, Third Party Advisory
https://github.com/krb5/krb5/pull/694Patch, Third Party Advisory
https://github.com/krb5/krb5/pull/694/commits/1de6ca2f2eb1fdbab51f1549a25a6903aefcc196Third Party Advisory
https://github.com/krb5/krb5/pull/694/commits/50fe4074f188c2d4da0c421e96553acea8378db2Third Party Advisory
https://github.com/krb5/krb5/pull/694/commits/b7af544e50a4d8291524f590e20dd44430bf627dThird Party Advisory
http://www.securityfocus.com/bid/100511Third Party Advisory, VDB Entry
https://access.redhat.com/errata/RHSA-2018:0666Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7562Issue Tracking, Patch, Third Party Advisory
https://github.com/krb5/krb5/pull/694Patch, Third Party Advisory
https://github.com/krb5/krb5/pull/694/commits/1de6ca2f2eb1fdbab51f1549a25a6903aefcc196Third Party Advisory
https://github.com/krb5/krb5/pull/694/commits/50fe4074f188c2d4da0c421e96553acea8378db2Third Party Advisory
https://github.com/krb5/krb5/pull/694/commits/b7af544e50a4d8291524f590e20dd44430bf627dThird Party Advisory

Timeline

Published: Jul 26, 2018
Last modified: Jun 17, 2026
NVD status: Modified

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