Home/CVE/Version 4 of the Kerberos protocol (krb4), as used in Heimdal and other packages, allows an attacker to impersonate any
CVE

CVE-2003-0138

Version 4 of the Kerberos protocol (krb4), as used in Heimdal and other packages, allows an attacker to impersonate any

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.

HIGH · CVSS 7.5 EPSS 0.05644
Schedule remediation
  • EPSS percentile: top 9% of all CVEs by exploitation likelihood
  • CVSS base score ≥ 7.0
Sigma rules8 YARA rules0
▤

Affected Products & Versions

1
mit kerberosall versions
◈

Sigma Hunt Rules

8
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
producthighSuspicious DNS Query Indicating Kerberos Coercion via DNS Object SPN Spoofing - Network
producthighSuspicious Kerberos Ticket Request via PowerShell Script - ScriptBlock
producthighSuspicious DNS Query Indicating Kerberos Coercion via DNS Object SPN Spoofing
producthighAttempts of Kerberos Coercion Via DNS SPN Spoofing
producthighSuspicious Kerberos Ticket Request via CLI
producthighPotential Kerberos Coercion by Spoofing SPNs via DNS Manipulation
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Scoring & Timeline

7.5
HIGH · CVSS v2 (legacy) · cve@mitre.org
View on NVD
This CVE predates CVSS v3; the legacy v2 score is shown so triage still has a severity to work with.
v2 Vector
AV:N/AC:L/Au:N/C:P/I:P/A:P
Published to NVD24 Mar 2003 · 05:00 AM
⚑

Vendor Advisories

4
rhsaRHSA-2003:052Important
rhsaRHSA-2003:051Critical
rhsaRHSA-2003:168Critical
rhsaRHSA-2003:091Critical
🔗

References & Sources

12
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://marc.info/?l=bugtraq&m=104791775804776&w=2
http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2003-004-krb4.txtPatchVendor Advisory
http://www.debian.org/security/2003/dsa-266PatchVendor Advisory
http://www.debian.org/security/2003/dsa-269
http://www.debian.org/security/2003/dsa-273
http://www.kb.cert.org/vuls/id/623217PatchThird Party AdvisoryUS Government Resource
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