CVE-2017-7562

What it is

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.

At a glance

Exploitability

Can be exploited over the network with a low-privilege account. High risk of data tampering.

Exploit odds

3.2% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2018-07-26 15:29 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 01:24 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 3.2% in the next 30 days (EPSS).
• Severity: 6.5 MEDIUM (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2018-07-26 15:29 UTC

Last modified

2026-06-17 01:24 UTC

Exploit probability

3.2% · EPSS, next 30 days

Weakness

CWE-287 · Improper authentication

Record status

Modified

Affected

• 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 < 1.16.1

Attack profile CVSS 3.1 · 6.5

Attack vector

Network

Complexity

Low

Privileges needed

Low

User interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2017-7562.md and follow it. Check whether this project is affected by CVE-2017-7562. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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