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    CVE-2003-0138

    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.

    Published:Mar 19, 2003
    Last Modified:Apr 16, 2026
    EPS:Mar 21, 2003
    EPSS Score:0.05644
    CVSS Score:7.5

    Affected Products

    Vendor
    Mit
    Product
    Kerberos
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Linux

    Exploits

    No exploit reference

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2018-20217 (CVSS 5.3) — A Reachable Assertion issue was discovered in the KDC in MIT Kerberos 5 (aka krb5) before 1.17. If an attacker…
    CVE-2018-5709 (CVSS 7.5) — An issue was discovered in MIT Kerberos 5 (aka krb5) through 1.16. There is a variable "dbentry->n_key_data" i…
    CVE-2018-5710 (CVSS 6.5) — An issue was discovered in MIT Kerberos 5 (aka krb5) through 1.16. The pre-defined function "strlen" is gettin…
    CVE-2017-11368 (CVSS 6.5) — In MIT Kerberos 5 (aka krb5) 1.7 and later, an authenticated attacker can cause a KDC assertion failure by sen…
    CVE-2014-5354 (CVSS 3.5) — plugins/kdb/ldap/libkdb_ldap/ldap_principal2.c in MIT Kerberos 5 (aka krb5) 1.12.x and 1.13.x before 1.13.1, w…
    CVE-2014-4342 (CVSS 5) — MIT Kerberos 5 (aka krb5) 1.7.x through 1.12.x before 1.12.2 allows remote attackers to cause a denial of serv…
    CVE-2013-6800 (CVSS 4) — An unspecified third-party database module for the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) …
    CVE-2011-0282 (CVSS 5) — The Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.6.x through 1.9, when an LDAP backend is used…
    CVE-2011-0281 (CVSS 5) — The unparse implementation in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.6.x through 1.9…
    CVE-2010-1323 (CVSS 3.7) — MIT Kerberos 5 (aka krb5) 1.3.x, 1.4.x, 1.5.x, 1.6.x, 1.7.x, and 1.8.x through 1.8.3 does not properly determi…

    References

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

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High