Vulnerability in Openssl

CVE-2011-4354

crypto/bn/bn_nist.c in OpenSSL before 0.9.8h on 32-bit platforms, as used in stunnel and other products, in certain circumstances involving ECDH or ECDHE cipher suites, uses an incorrect modular reduction algorithm in its implementation of the P-256 and P-384 NIST elliptic curves, which allows remote attackers to obtain the private key of a TLS server via multiple handshake attempts.

Vulnerability class: POODLE (CVE-2014-3566)

EPSS: 0.040 (89.6th percentile) — read the EPSS interpretation.

Affected products

  • Openssl — versions 0.9.1c, 0.9.2b, 0.9.3
  • N/a — versions n/a

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2011-4354?
CVE-2011-4354 is a vulnerability in Openssl, classified under Cryptographic Issues. Published 2012-01-27.
Is CVE-2011-4354 known to be exploited?
2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.