Description
OpenSSL before 0.9.7, 0.9.7 before 0.9.7k, and 0.9.8 before 0.9.8c, when using an RSA key with exponent 3, removes PKCS-1 padding before generating a hash, which allows remote attackers to forge a PKCS #1 v1.5 signature that is signed by that RSA key and prevents OpenSSL from correctly verifying X.509 and other certificates that use PKCS #1.
Analysis and contextual insights are available on OpenCVE Cloud.
Remediation
No vendor fix or workaround currently provided.
Additional remediation guidance may be available on OpenCVE Cloud.
Tracking
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Advisories
| Source | ID | Title |
|---|---|---|
Debian DSA |
DSA-1173-1 | New openssl packages fix RSA signature forgery cryptographic weakness |
Debian DSA |
DSA-1174-1 | New openssl096 packages fix RSA signature forgery cryptographic weakness |
EUVD |
EUVD-2006-4327 | OpenSSL before 0.9.7, 0.9.7 before 0.9.7k, and 0.9.8 before 0.9.8c, when using an RSA key with exponent 3, removes PKCS-1 padding before generating a hash, which allows remote attackers to forge a PKCS #1 v1.5 signature that is signed by that RSA key and prevents OpenSSL from correctly verifying X.509 and other certificates that use PKCS #1. |
Ubuntu USN |
USN-339-1 | OpenSSL vulnerability |
References
History
Wed, 16 Jul 2025 13:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
epss
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epss
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Status: PUBLISHED
Assigner: redhat
Published:
Updated: 2024-08-07T19:06:07.378Z
Reserved: 2006-08-24T00:00:00.000Z
Link: CVE-2006-4339
No data.
Status : Modified
Published: 2006-09-05T17:04:00.000
Modified: 2026-04-16T00:27:16.627
Link: CVE-2006-4339
OpenCVE Enrichment
No data.
Weaknesses
Debian DSA
EUVD
Ubuntu USN