CVE-2017-11368

What it is

In MIT Kerberos 5 (aka krb5) 1.7 and later, an authenticated attacker can cause a KDC assertion failure by sending invalid S4U2Self or S4U2Proxy requests.

At a glance

Exploitability

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

Exploit odds

2.4% chance of exploitation in the next 30 days (EPSS).

Fix

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

Timeline

1. 2017-08-09 18:29 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 01:01 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 2.4% in the next 30 days (EPSS).
• Severity: 6.5 MEDIUM (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2017-08-09 18:29 UTC

Last modified

2026-06-17 01:01 UTC

Exploit probability

2.4% · EPSS, next 30 days

Weakness

CWE-617

Record status

Modified

Affected

• Fedoraproject Fedora 25
• Fedoraproject Fedora 26
• Mit Kerberos 5-1.13.7
• Mit Kerberos 5 1.7
• Mit Kerberos 5 1.7.1
• Mit Kerberos 5 1.8
• Mit Kerberos 5 1.8.1
• Mit Kerberos 5 1.8.2

Attack profile CVSS 3.0 · 6.5

Attack vector

Network

Complexity

Low

Privileges needed

Low

User interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Is it in your code?

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