CVE-2011-4354 Weak cryptography in n/a
Remote attackers can recover TLS server private keys via multiple handshake attempts due to incorrect modular reduction in OpenSSL's NIST curve implementation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2011-4354?
CVE-2011-4354 is a medium-severity vulnerability in Openssl Openssl, published on 27 Jan 2012. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-310
Which versions are affected by CVE-2011-4354?
It affects 1 product.
Products include Openssl Openssl.
How do I fix CVE-2011-4354?
Upgrade to a fixed version.
Is CVE-2011-4354 being exploited?
There is no known exploitation of CVE-2011-4354 in the wild and no public exploit code.
Other vulnerabilities in Openssl Openssl
Sources
Also known as DEBIAN-CVE-2011-4354, GHSA-wph7-m6hx-9r8m.