From: Matt Caswell Date: Thu, 10 Nov 2016 11:49:06 +0000 (+0000) Subject: Update CHANGES and NEWS X-Git-Tag: OpenSSL_1_0_2k~42 X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff_plain;h=19e1de548eff0b08ba2878b3258aaceead32977b Update CHANGES and NEWS Reviewed-by: Richard Levitte --- diff --git a/CHANGES b/CHANGES index 1fbe3b30ed..15c927720c 100644 --- a/CHANGES +++ b/CHANGES @@ -4,6 +4,29 @@ Changes between 1.0.2j and 1.0.2k [xx XXX xxxx] + *) 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] + *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually diff --git a/NEWS b/NEWS index d750fb57b1..efd2dbf0bd 100644 --- a/NEWS +++ b/NEWS @@ -7,7 +7,7 @@ Major changes between OpenSSL 1.0.2j and OpenSSL 1.0.2k [under development] - o + o Montgomery multiplication may produce incorrect results (CVE-2016-7055) Major changes between OpenSSL 1.0.2i and OpenSSL 1.0.2j [26 Sep 2016]