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This vulnerability (CVE-2015-0291) allows anyone to take a certificate, read its contents and modify it accurately to abuse the vulnerability causing a certificate to crash a client or server. If a client connects to an OpenSSL 1.0.2 server and renegotiates with an invalid signature algorithms extension, a null-pointer dereference occurs.
It runs on a variety of operating systems, [5] including most Unix-like operating systems and Windows. Stunnel relies on the OpenSSL library to implement the underlying TLS or SSL protocol. Stunnel uses public-key cryptography with X.509 digital certificates to secure the SSL connection, and clients can optionally be authenticated via a ...
Several versions of the TLS protocol exist. SSL 2.0 is a deprecated [27] protocol version with significant weaknesses. SSL 3.0 (1996) and TLS 1.0 (1999) are successors with two weaknesses in CBC-padding that were explained in 2001 by Serge Vaudenay. [28]
Windows uses the .p7b file name extension [6] for both these encodings. A typical use of a PKCS #7 file would be to store certificates and/or certificate revocation lists (CRL). Here's an example of how to first download a certificate, then wrap it inside a PKCS #7 archive and then read from that archive:
mod_ssl is an optional module for the Apache HTTP Server.It provides strong cryptography for the Apache v1.3 and v2 webserver via the Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) cryptographic protocols by the help of the Open Source SSL/TLS toolkit OpenSSL.
OpenSSL was available at the time, and was dual licensed under the OpenSSL License and the SSLeay license. [7] yaSSL, alternatively, was developed and dual-licensed under both a commercial license and the GPL. [8] yaSSL offered a more modern API, commercial style developer support and was complete with an OpenSSL compatibility layer. [4]
The ISRG provides free and open-source reference implementations for ACME: certbot is a Python-based implementation of server certificate management software using the ACME protocol, [6] [7] [8] and boulder is a certificate authority implementation, written in Go. [9] Since 2015 a large variety of client options have appeared for all operating ...
Using the openssl plugin, strongSwan supports Elliptic Curve Cryptography (ECDH groups and ECDSA certificates and signatures) both for IKEv2 and IKEv1, so that interoperability with Microsoft's Suite B implementation on Vista, Win 7, Server 2008, etc. is possible.