CVE-2004-0643

CVE-2004-0643 is a medium-severity vulnerability in Mit Kerberos 5 with a CVSS 2.0 base score of 4.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-415.

Key facts

• Severity: Medium (CVSS 2.0 base score 4.6)
• EPSS exploit prediction: 1% (70th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-415
• Affected product: Mit Kerberos 5
• Published: 2004-09-28
• Last modified: 2026-06-16

Description

Double free vulnerability in the krb5_rd_cred function for MIT Kerberos 5 (krb5) 1.3.1 and earlier may allow local users to execute arbitrary code.

Frequently asked questions

What is CVE-2004-0643?

Double free vulnerability in the krb5_rd_cred function for MIT Kerberos 5 (krb5) 1.3.1 and earlier may allow local users to execute arbitrary code.

How severe is CVE-2004-0643?

CVE-2004-0643 has a CVSS 2.0 base score of 4.6, rated medium severity.

Is CVE-2004-0643 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2004-0643?

CVE-2004-0643 primarily affects Mit Kerberos 5. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2004-0643?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2004-0643 published?

CVE-2004-0643 was published on 2004-09-28 and last updated on 2026-06-16.

References

• http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000860
• http://marc.info/?l=bugtraq&m=109508872524753&w=2
• http://rhn.redhat.com/errata/RHSA-2004-350.html
• http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2004-002-dblfree.txt
• http://www.debian.org/security/2004/dsa-543
• http://www.gentoo.org/security/en/glsa/glsa-200409-09.xml
• http://www.kb.cert.org/vuls/id/866472
• http://www.securityfocus.com/bid/11078
• http://www.trustix.net/errata/2004/0045/
• http://www.us-cert.gov/cas/techalerts/TA04-247A.html
• https://exchange.xforce.ibmcloud.com/vulnerabilities/17159
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10267
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A3322

Affected products (5)

• cpe:2.3:a:mit:kerberos_5:*:*:*:*:*:*:*:*
• cpe:2.3:o:debian:debian_linux:3.0:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_desktop:3.0:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_server:3.0:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_workstation:3.0:*:*:*:*:*:*:*

More vulnerabilities in Mit Kerberos 5

• CVE-2011-0285 — Critical (CVSS 10.0): The process_chpw_request function in schpw.c in the password-changing functionality in kadmind in MIT Kerberos 5 (aka…
• CVE-2009-4212 — Critical (CVSS 10.0): Multiple integer underflows in the (1) AES and (2) RC4 decryption functionality in the crypto library in MIT Kerberos 5…
• CVE-2009-0846 — Critical (CVSS 10.0): The asn1_decode_generaltime function in lib/krb5/asn.1/asn1_decode.c in the ASN.1 GeneralizedTime decoder in MIT…
• CVE-2008-0947 — Critical (CVSS 10.0): Buffer overflow in the RPC library used by libgssrpc and kadmind in MIT Kerberos 5 (krb5) 1.4 through 1.6.3 allows…
• CVE-2007-5902 — Critical (CVSS 10.0): Integer overflow in the svcauth_gss_get_principal function in lib/rpc/svc_auth_gss.c in MIT Kerberos 5 (krb5) allows…
• CVE-2007-4743 — Critical (CVSS 10.0): The original patch for CVE-2007-3999 in svc_auth_gss.c in the RPCSEC_GSS RPC library in MIT Kerberos 5 (krb5) 1.4…

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• CVE-2020-37239 — Critical (CVSS 9.8): libbabl 0.1.62 contains a broken double free detection vulnerability that allows attackers to bypass memory safety…
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• CVE-2026-31609 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: smb: client: avoid double-free in…
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