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Status published
Medium
CVE-2017-7562
An authentication bypass flaw was found in the way krb5's...
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.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
References
- https://github.com/krb5/krb5/pull/694/commits/50fe4074f188c2d4da0c421e96553acea8378db2
- http://www.securityfocus.com/bid/100511
- https://github.com/krb5/krb5/pull/694/commits/1de6ca2f2eb1fdbab51f1549a25a6903aefcc196
- https://github.com/krb5/krb5/pull/694
- https://access.redhat.com/errata/RHSA-2018:0666
- https://github.com/krb5/krb5/pull/694/commits/b7af544e50a4d8291524f590e20dd44430bf627d
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7562
Affected Vendor
Affected Software
krb5
Vulnerable Versions:
1.16.1
Timeline
Official Publish:
July 26th, 2018
Last Modified:
August 5th, 2024
Added to House:
July 20th, 2026
CVSS Vectors
V3:
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
MITRE ATT&CK TTPs
T1557
Adversary-in-the-Middle
Credential Access
T1040
Network Sniffing
Collection
T1552
Unsecured Credentials
Credential Access
T1071
Application Layer Protocol
Command and Control
T1565
Data Manipulation
Impact
T1190
Exploit Public-Facing Application
Initial Access
T1078
Valid Accounts
Persistence
T1556
Modify Authentication Process
Credential Access