What is CVE-2004-0434?

CVE-2004-0434 is a critical-severity vulnerability in Heimdal Project, classified under Incorrect Calculation of Buffer Size. CVSS score: 9.8/10. Published 2004-07-07.

How severe is CVE-2004-0434?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Heimdal Project

CVE-2004-0434

k5admind (kadmind) for Heimdal allows remote attackers to execute arbitrary code via a Kerberos 4 compatibility administration request whose framing length is less than 2, which leads to a heap-based buffer overflow.

Published 2004-07-07 · last modified 2026-06-16.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.072 (94.1th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 94.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.072 · newest: 0.072 · change: 0.000

Affected products

Heimdal Project
Debian Linux — versions 3.0

Weakness classification (CWE)

CWE-131 — Incorrect Calculation of Buffer Size

References

exchange.xforce.ibmcloud.com/vulnerabilities/16071 (VDB Entry, Third Party Advisory, vdb-entry)
www.debian.org/security/2004/dsa-504 (vendor-advisory, Patch, Third Party Advisory, Broken Link)
lists.grok.org.uk/pipermail/full-disclosure/2004-May/020998.html (mailing-list, Third Party Advisory, Broken Link)
marc.info/ (mailing-list, Mailing List)
security.gentoo.org/glsa/glsa-200405-23.xml (vendor-advisory, Third Party Advisory)

Frequently asked questions

What is CVE-2004-0434?: CVE-2004-0434 is a critical-severity vulnerability in Heimdal Project, classified under Incorrect Calculation of Buffer Size. CVSS score: 9.8/10. Published 2004-07-07.
How severe is CVE-2004-0434?: Critical severity. CVSS v3 base score is 9.8 out of 10.