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NVD / CVE Program· CNA mitre

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…

MediumCVSS 4.6 · v2.0—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 21/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 8.9% (FIRST EPSS); higher than 95.3% of all records.
  • No special conditions are required; it is repeatable.
  • Fixed version: krb5 (Debian:12) 1.3.4-3; krb5 (Debian:3.0) 1.2.4-5woody6; krb5 (Red Hat:enterprise_linux:3::as) 0:1.2.7-28.

Low priority for now. Upgrade to krb5 (Debian:12) 1.3.4-3; krb5 (Debian:3.0) 1.2.4-5woody6; krb5 (Red Hat:enterprise_linux:3::as) 0:1.2.7-28 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

Published
Sep 28, 2004
Updated
Jun 16, 2026
EPSS
8.9% · 95th percentile

Report tools

JSON

Action score

21

Monitor

Low priority for now.

CVSS
18 / 40 · 4.6 / 10
CISA KEV
0 / 30 · Not listed
EPSS
3 / 30 · 8.9%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2004-0643

When you'll hear from us

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  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
mitkerberos 5
debiandebian linux
redhatenterprise linux desktop
redhatenterprise linux server
redhatenterprise linux workstation

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • debian debian linux3.0
  • mit kerberos 5up to 1.3.3 inclusive
  • redhat enterprise linux desktop3.0
  • redhat enterprise linux server3.0
  • redhat enterprise linux workstation3.0

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12krb5before 1.3.4-31.3.4-3
Debian:3.0krb5before 1.2.4-5woody61.2.4-5woody6
Red Hat:enterprise_linux:3::askrb5before 0:1.2.7-280:1.2.7-28
Red Hat:enterprise_linux:3::askrb5-debuginfobefore 0:1.2.7-280:1.2.7-28
Red Hat:enterprise_linux:3::askrb5-develbefore 0:1.2.7-280:1.2.7-28
Red Hat:enterprise_linux:3::askrb5-libsbefore 0:1.2.7-280:1.2.7-28
Red Hat:enterprise_linux:3::askrb5-serverbefore 0:1.2.7-280:1.2.7-28
Red Hat:enterprise_linux:3::askrb5-workstationbefore 0:1.2.7-280:1.2.7-28

Same product

mit: all records

Other highest-scoring records for the same primary product.

  • CVE-2007-0956The telnet daemon (telnetd) in MIT krb5 before 1.6.1 allows remote attackers to bypass authentication and gain system access via a username…
    49Plan
  • CVE-2011-0285The process_chpw_request function in schpw.c in the password-changing functionality in kadmind in MIT Kerberos 5 (aka krb5) 1.7 through 1.9…
    46Plan
  • CVE-2001-0247Buffer overflows in BSD-based FTP servers allows remote attackers to execute arbitrary commands via a long pattern string containing a {}…
    46Plan

Published before and after this one in the same product

  • ← EarlierCVE-2003-0060Feb 19, 2003 · Format string vulnerabilities in the logging routines for MIT Kerberos V5 Key Distribution Center (KDC) before 1.2.5 allow remote attackers…
    32Monitor
  • ← EarlierCVE-2004-0642Sep 28, 2004 · Double free vulnerabilities in the error handling code for ASN.1 decoders in the (1) Key Distribution Center (KDC) library and (2) client…
    32Monitor
  • Later →CVE-2004-0644Sep 28, 2004 · The asn1buf_skiptail function in the ASN.1 decoder library for MIT Kerberos 5 (krb5) 1.2.2 through 1.3.4 allows remote attackers to cause a…
    22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:krb51.3.4-3 · Debian:12Package registry (OSV)
red hat:krb50:1.2.7-28 · Red Hat:enterprise_linux:3::asPackage registry (OSV)
red hat:krb5-debuginfo0:1.2.7-28 · Red Hat:enterprise_linux:3::asPackage registry (OSV)
red hat:krb5-devel0:1.2.7-28 · Red Hat:enterprise_linux:3::asPackage registry (OSV)
red hat:krb5-libs0:1.2.7-28 · Red Hat:enterprise_linux:3::asPackage registry (OSV)
red hat:krb5-server0:1.2.7-28 · Red Hat:enterprise_linux:3::asPackage registry (OSV)
red hat:krb5-workstation0:1.2.7-28 · Red Hat:enterprise_linux:3::asPackage registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Not on record for this CVE: patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • No special conditions are required; it is repeatable.

If successful

Confidentiality
P · data can be read
Integrity
P · data or configuration can be modified
Availability
P · the service can be disrupted
Attack complexity
Low
Confidentiality impact
P
Integrity impact
P
Availability impact
P

Weakness class (CWE)

CWE-415 · Double Free

CVSS vector

AV:L/AC:L/Au:N/C:P/I:P/A:P

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

References

Show all references (12 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records