Go to homepageCyberStrike

Menu

Star on GitHub · 3.2k
Sign inDownload

CVE-2011-4354

5.8 · MEDIUM

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 re…

Published Jan 27, 2012opensslCWE-310EPSS 2.99%

Overview

CVE-2011-4354 is a medium-severity vulnerability affecting openssl openssl. It was published on January 27, 2012 and has a CVSS 2.0 base score of 5.8 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 5.8, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories and patches from openssl. Update openssl to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
opensslopenssl0Affected

References

Refcrypto.di.uminho.pt/CACE/CT-RSA2012-openssl-src.zipRefcvs.openssl.org/filediff?f=openssl/crypto/bn/bn_nist.c&v1=1.14&v2=1.21Refeprint.iacr.org/2011/633Refmarc.info/?t=119271238800004Refopenwall.com/lists/oss-security/2011/12/01/6Refrt.openssl.org/Ticket/Display.html?id=1593&user=guest&pass=guestRefwww.debian.org/security/2012/dsa-2390Refbugzilla.redhat.com/show_bug.cgi?id=757909Refcrypto.di.uminho.pt/CACE/CT-RSA2012-openssl-src.zipRefcvs.openssl.org/filediff?f=openssl/crypto/bn/bn_nist.c&v1=1.14&v2=1.21

How CyberStrike helps

Frequently asked questions

What is CVE-2011-4354?

CVE-2011-4354 is a medium-severity vulnerability affecting openssl openssl. It was published on January 27, 2012 and has a CVSS 2.0 base score of 5.8 (MEDIUM).

How severe is CVE-2011-4354?

This vulnerability has a CVSS 2.0 base score of 5.8, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2011-4354?

Check the references section for vendor advisories and patches from openssl. Update openssl to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2011-4354?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2011-4354 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

Related MEDIUM CVEs from 2011

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999