Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Redhat | Enterprise Linux | 7.0 |
| Redhat | Enterprise Linux Desktop | 7.0 |
| Redhat | Enterprise Linux Server | 7.0 |
| Redhat | Enterprise Linux Workstation | 7.0 |
| Mit | Kerberos 5 | >= 1.0, < 1.16.1 |
Related Weaknesses (CWE)
References
- http://www.securityfocus.com/bid/100511Third Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2018:0666Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7562Issue TrackingPatchThird Party Advisory
- https://github.com/krb5/krb5/pull/694PatchThird Party Advisory
- https://github.com/krb5/krb5/pull/694/commits/1de6ca2f2eb1fdbab51f1549a25a6903aeThird Party Advisory
- https://github.com/krb5/krb5/pull/694/commits/50fe4074f188c2d4da0c421e96553acea8Third Party Advisory
- https://github.com/krb5/krb5/pull/694/commits/b7af544e50a4d8291524f590e20dd44430Third Party Advisory
- http://www.securityfocus.com/bid/100511Third Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2018:0666Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7562Issue TrackingPatchThird Party Advisory
- https://github.com/krb5/krb5/pull/694PatchThird Party Advisory
- https://github.com/krb5/krb5/pull/694/commits/1de6ca2f2eb1fdbab51f1549a25a6903aeThird Party Advisory
- https://github.com/krb5/krb5/pull/694/commits/50fe4074f188c2d4da0c421e96553acea8Third Party Advisory
- https://github.com/krb5/krb5/pull/694/commits/b7af544e50a4d8291524f590e20dd44430Third Party Advisory
FAQ
What is CVE-2017-7562?
CVE-2017-7562 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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 poten...
How severe is CVE-2017-7562?
CVE-2017-7562 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2017-7562?
Check the references section above for vendor advisories and patch information. Affected products include: Redhat Enterprise Linux, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Server, Redhat Enterprise Linux Workstation, Mit Kerberos 5.