CVE-2011-0284

What it is

Double free vulnerability in the prepare_error_as function in do_as_req.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.7 through 1.9, when the PKINIT feature is enabled, allows remote attackers to cause a denial of service (daemon crash) or possibly execute arbitrary code via an e_data field containing typed data.

At a glance

Exploitability

Can be exploited over the network without logging in. High risk of data exposure, data tampering, service disruption.

Exploit odds

8.3% chance of exploitation in the next 30 days (EPSS).

Fix

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

Timeline

1. 2011-03-20 02:00 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-16 23:27 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 8.3% in the next 30 days (EPSS).
• Severity: 7.6 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2011-03-20 02:00 UTC

Last modified

2026-06-16 23:27 UTC

Exploit probability

8.3% · EPSS, next 30 days

Weakness

CWE-399

Record status

Modified

Affected

• 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
• Mit Kerberos 5 1.8.3
• Mit Kerberos 5 1.9

Attack profile CVSS 2.0 · 7.6

Attack vector

Network

Complexity

High

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

Is it in your code?

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