OpenSSL Security Advisory 20220128 - There is a carry propagation bug in the MIPS32 and MIPS64 squaring procedure. Many EC algorithms are affected, including some of the TLS 1.3 default curves. Impact was not analyzed in detail, because the pre-requisites for attack are considered unlikely and include reusing private keys. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be significant. However, for an attack on TLS to be meaningful, the server would have to share the DH private key among multiple clients, which is no longer an option since CVE-2016-0701.
9383b0cde7f5a7a29255898a505a908a2012ed0523afb1a778544fce277e37daOpenSSL Security Advisory 20200909 - The Raccoon attack exploits a flaw in the TLS specification which can lead to an attacker being able to compute the pre-master secret in connections which have used a Diffie-Hellman (DH) based ciphersuite. In such a case this would result in the attacker being able to eavesdrop on all encrypted communications sent over that TLS connection. The attack can only be exploited if an implementation re-uses a DH secret across multiple TLS connections. Note that this issue only impacts DH ciphersuites and not ECDH ciphersuites.
7e97b3aea367a7b5b6d7e3019145662bd862f961fbc35bedb7a4f2ece170d7b0OpenSSL Security Advisory 20180327 - Constructed ASN.1 types with a recursive definition (such as can be found in PKCS7) could eventually exceed the stack given malicious input with excessive recursion. This could result in a Denial Of Service attack. There are no such structures used within SSL/TLS that come from untrusted sources so this is considered safe. Other issues were also addressed.
06f896618c972892739490677cca48ef1283e588c8790590bbec26307dcc26b6OpenSSL Security Advisory 20171207 - OpenSSL 1.0.2 (starting from version 1.0.2b) introduced an "error state" mechanism. The intent was that if a fatal error occurred during a handshake then OpenSSL would move into the error state and would immediately fail if you attempted to continue the handshake. This works as designed for the explicit handshake functions (SSL_do_handshake(), SSL_accept() and SSL_connect()), however due to a bug it does not work correctly if SSL_read() or SSL_write() is called directly. In that scenario, if the handshake fails then a fatal error will be returned in the initial function call. If SSL_read()/SSL_write() is subsequently called by the application for the same SSL object then it will succeed and the data is passed without being decrypted/encrypted directly from the SSL/TLS record layer. Other issues were also addressed.
5b23d35b31c30e0ba27356ef231c18b5e034386ca01935b4c9740a2cf6a7469bHPE Security Bulletin HPESBHF03703 1 - Potential security vulnerabilities with OpenSSL have been addressed in HPE Network Products including Comware v7 and VCX. The vulnerabilities could be remotely exploited resulting in disclosure of information. Revision 1 of this advisory.
acee65a7f7bf8e6864f7a5a2cd37a53233475319b0b9438bbf1aabc525e19afeHP Security Bulletin HPSBGN03621 1 - Several potential security vulnerabilities have been identified in the OpenSSL library for HPE Universal CMDB. These vulnerabilities could be exploited remotely to allow disclosure of sensitive information. Revision 1 of this advisory.
6aafc05f1d11b18f3329c8dbdfe48519893d60f5e7b228f2e00ceff72c673efdGentoo Linux Security Advisory 201601-5 - Multiple vulnerabilities have been found in OpenSSL, allowing remote attackers to disclose sensitive information and complete weak handshakes. Versions less than 1.0.2f are affected.
3e4a19fb2f2cd2aa82d1304dd1ac46b284296f7ad05d6f86c70a3baddba1a5cbOpenSSL is a robust, fully featured Open Source toolkit implementing the Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) protocols with full-strength cryptography world-wide.
932b4ee4def2b434f85435d9e3e19ca8ba99ce9a065a61524b429a9d5e9b2e9cUbuntu Security Notice 2883-1 - Antonio Sanso discovered that OpenSSL reused the same private DH exponent for the life of a server process when configured with a X9.42 style parameter file. This could allow a remote attacker to possibly discover the server's private DH exponent when being used with non-safe primes.
e6cc39accadcc806fe59f5b71d75c4bdade362ac1da83bbaf9b3dfc0944cda77OpenSSL Security Advisory 20160128 - Historically OpenSSL usually only ever generated DH parameters based on "safe" primes. More recently (in version 1.0.2) support was provided for generating X9.42 style parameter files such as those required for RFC 5114 support. The primes used in such files may not be "safe". Where an application is using DH configured with parameters based on primes that are not "safe" then an attacker could use this fact to find a peer's private DH exponent. This attack requires that the attacker complete multiple handshakes in which the peer uses the same private DH exponent. For example this could be used to discover a TLS server's private DH exponent if it's reusing the private DH exponent or it's using a static DH ciphersuite. Other issues were also addressed.
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