The MD5 Message-Digest Algorithm is not collision resistant, which makes it easier for…
Priority MEDIUM 61CWE-328Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat.
Summary
The MD5 Message-Digest Algorithm is not collision resistant, which makes it easier for context-dependent attackers to conduct spoofing attacks, as demonstrated by attacks on the use of MD5 in the signature algorithm of an X.509 certificate.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.10122 95th percentileScored 2026-11-07
Fix Fixed Red Hat: 2 advisories
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
Red Hat 2 advisories
- RHSA-2010:0838 Released 2010-11-08 · Red Hat rating Moderatepki security and enhancement update
- Red Hat Certificate System 8 pki-ca-8.0.7-1.el5pki, pki-common-8.0.6-2.el5pki, pki-common-javadoc-8.0.6-2.el5pki +2
- RHSA-2010:0837 Released 2010-11-08 · Red Hat rating Moderaterhpki security and enhancement update
- Red Hat Certificate System 7.3 for 4AS rhpki-ca-7.3.0-21.el4, rhpki-common-7.3.0-41.el4, rhpki-util-7.3.0-21.el4
- Red Hat Certificate System 7.3 for 4ES rhpki-ca-7.3.0-21.el4, rhpki-common-7.3.0-41.el4, rhpki-util-7.3.0-21.el4
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Certificate System 7.3 for 4AS | Fixed | RHSA-2010:0837 |
| Red Hat Certificate System 7.3 for 4ES | Fixed | RHSA-2010:0837 |
| Red Hat Certificate System 8 | Fixed | RHSA-2010:0838 |
Timeline
- 2026-10-02 Threatist record created from CVE-2004-2761
- 2026-10-03 Alias added: GHSA-2q4p-93p8-q2j6
References
Advisory 7
Other 12
- http://www.phreedom.org/research/rogue-ca/
- http://blog.mozilla.com/security/2008/12/30/md5-weaknesses-could-lead-to-certificate-forgery/
- http://www.win.tue.nl/hashclash/SoftIntCodeSign/
- https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03814en_us
- http://blogs.technet.com/swi/archive/2008/12/30/information-regarding-md5-collisions-problem.aspx
- http://www.doxpara.com/research/md5/md5_someday.pdf
- https://ics-cert.us-cert.gov/advisories/ICSMA-18-058-02
- https://blogs.verisign.com/ssl-blog/2008/12/on_md5_vulnerabilities_and_mit.php
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05336888
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05289935
- http://www.win.tue.nl/hashclash/rogue-ca/
- https://bugzilla.redhat.com/show_bug.cgi?id=648886
Sources
- CVE-2004-2761 · CVE Program
- CVE-2004-2761 · NVD
- FIRST EPSS
- GHSA-2q4p-93p8-q2j6 · GitHub Advisory Database · CC BY 4.0
- CVE-2004-2761 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences