CVE-2006-4339
CRITICAL · CVSS 9.1EPSS 3.9%EU EUVD
A flaw was found in OpenSSL. When configured to use an RSA key with exponent 3, OpenSSL improperly removes PKCS-1 padding before generating a hash. This allows remote attackers to forge PKCS #1 v1.5 signatures. Consequently, OpenSSL may incorrectly verify X.509 and other certificates, leading to a bypass of trust and authentication mechanisms.
Key facts
- CVSS score
- 9.1 (v3.1)
- Severity
- CRITICAL
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N- Weakness (CWE)
- CWE-347
- EPSS score
- 3.9% (90th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2006-4327)
- Published
- September 5, 2006
- NVD last modified
- November 4, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2006-4327 in the EU Vulnerability Database. Last updated in EUVD on November 4, 2026.
View on the EU Vulnerability DatabaseAffected products
- openssl / openssl
- openssl / openssl
- openssl / openssl
- openssl / openssl
- openssl / openssl
- openssl / openssl
- openssl / openssl
- openssl / openssl
- openssl / openssl
- openssl / openssl
- openssl / openssl
- openssl / openssl
- openssl / openssl
- openssl / openssl
- openssl / openssl
- openssl / openssl
- openssl / openssl
- openssl / openssl
- openssl / openssl
- openssl / openssl
- openssl / openssl
- openssl / openssl
- openssl / openssl
- openssl / openssl
- openssl / openssl
- openssl / openssl
- openssl / openssl
- openssl / openssl
- openssl / openssl
- openssl / openssl
- openssl / openssl
- openssl / openssl
- openssl / openssl
- openssl / openssl
- openssl / openssl
- openssl / openssl
- openssl / openssl
- openssl / openssl
- openssl / openssl
- openssl / openssl
- openssl / openssl
- openssl / openssl
- openssl / openssl
- openssl / openssl
- openssl / openssl
References
- ftp://patches.sgi.com/support/free/security/advisories/20060901-01-P.asc
- http://dev2dev.bea.com/pub/advisory/238
- http://docs.info.apple.com/article.html?artnum=304829
- http://docs.info.apple.com/article.html?artnum=307177
- http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=us&objectID=c01070495
- http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c01118771
- http://itrc.hp.com/service/cki/docDisplay.do?docId=c00849540
- http://jvn.jp/en/jp/JVN51615542/index.html
- http://jvndb.jvn.jp/ja/contents/2012/JVNDB-2012-000079.html
- http://lists.apple.com/archives/Security-announce/2007/Dec/msg00001.html
- http://lists.apple.com/archives/security-announce/2006/Nov/msg00001.html
- http://lists.vmware.com/pipermail/security-announce/2008/000008.html
- http://marc.info/?l=bind-announce&m=116253119512445&w=2
- http://marc.info/?l=bugtraq&m=130497311408250&w=2
- http://openvpn.net/changelog.html
- http://secunia.com/advisories/21709(Patch, Vendor Advisory)
- http://secunia.com/advisories/21767(Vendor Advisory)
- http://secunia.com/advisories/21776(Vendor Advisory)
- http://secunia.com/advisories/21778(Vendor Advisory)
- http://secunia.com/advisories/21785(Vendor Advisory)
- http://secunia.com/advisories/21791(Vendor Advisory)
- http://secunia.com/advisories/21812(Vendor Advisory)
- http://secunia.com/advisories/21823(Vendor Advisory)
- http://secunia.com/advisories/21846(Vendor Advisory)
- http://secunia.com/advisories/21852(Vendor Advisory)
- http://secunia.com/advisories/21870(Vendor Advisory)
- http://secunia.com/advisories/21873(Vendor Advisory)
- http://secunia.com/advisories/21906(Vendor Advisory)
- http://secunia.com/advisories/21927(Vendor Advisory)
- http://secunia.com/advisories/21930(Vendor Advisory)
- http://secunia.com/advisories/21982(Vendor Advisory)
- http://secunia.com/advisories/22036(Vendor Advisory)
- http://secunia.com/advisories/22044
- http://secunia.com/advisories/22066
- http://secunia.com/advisories/22161(Vendor Advisory)
- http://secunia.com/advisories/22226(Vendor Advisory)
- http://secunia.com/advisories/22232(Vendor Advisory)
- http://secunia.com/advisories/22259(Vendor Advisory)
- http://secunia.com/advisories/22260(Vendor Advisory)
- http://secunia.com/advisories/22284
Last updated November 6, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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