M2Crypto does not properly check the return value from the OpenSSL EVP_VerifyFinal…
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- Partial · None · None
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA. Impact type from CWE-287.
Summary
M2Crypto does not properly check the return value from the OpenSSL EVP_VerifyFinal, DSA_verify, ECDSA_verify, DSA_do_verify, and ECDSA_do_verify functions, which might allow remote attackers to bypass validation of the certificate chain via a malformed SSL/TLS signature, a similar vulnerability to CVE-2008-5077. NOTE: a Linux vendor disputes the relevance of this report to the M2Crypto product because "these functions are not used anywhere in m2crypto.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
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
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:heikkitoivonen:m2crypto:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Heikkitoivonen |
- cpe:2.3:a:heikkitoivonen:m2crypto:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Heikkitoivonen
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2009-0127
- 2026-10-03 Alias added: GHSA-933f-4fwg-646j
References
Sources
- CVE-2009-0127 · CVE Program
- CVE-2009-0127 · NVD
- FIRST EPSS
- GHSA-933f-4fwg-646j · GitHub Advisory Database · CC BY 4.0
- CVE-2009-0127 · Red Hat security data · CC BY 4.0
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