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OpenSSL v1.1.0.b Release Notes

Release Date: 2016-11-10 // over 7 years ago
    • ChaCha20/Poly1305 heap-buffer-overflow

    TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS.

    This issue was reported to OpenSSL by Robert Święcki (Google Security Team) [CVE-2016-7054][]

    Richard Levitte

    • CMS Null dereference

    Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected.

    This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. [CVE-2016-7053][]

    Stephen Henson

    • Montgomery multiplication may produce incorrect results

    There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected.

    This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. [CVE-2016-7055][]

    Andy Polyakov

    • Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more.

    Richard Levitte