# CVE-2003-0138

## Summary

- **CVE ID:** CVE-2003-0138
- **Severity:** UNKNOWN
- **CVSS Score:** 0.23
- **CWE:** N/A
- **Published:** Mar 21, 2003
- **Last Modified:** Mar 16, 2026

## Description

Version 4 of the Kerberos protocol (krb4), as used in Heimdal and other packages, allows an attacker to impersonate any principal in a realm via a chosen-plaintext attack.

## Affected Products

- n/a — n/a (n/a)

## References

- [CNA](http://www.debian.org/security/2003/dsa-269)
- [CNA](http://www.redhat.com/support/errata/RHSA-2003-052.html)
- [CNA](http://www.securityfocus.com/archive/1/316960/30/25250/threaded)
- [CNA](http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2003-004-krb4.txt)
- [CNA](https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A248)
- [CNA](http://www.redhat.com/support/errata/RHSA-2003-091.html)
- [CNA](http://www.debian.org/security/2003/dsa-273)
- [CNA](http://www.redhat.com/support/errata/RHSA-2003-051.html)
- [CNA](http://www.kb.cert.org/vuls/id/623217)
- [CNA](http://www.debian.org/security/2003/dsa-266)
- [CNA](http://marc.info/?l=bugtraq&m=104791775804776&w=2)
- [CNA](http://www.securityfocus.com/bid/7113)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 5.64%
- **EPSS Percentile:** 90.2

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._