Update CHANGES and NEWS

Reviewed-by: Richard Levitte <levitte@openssl.org>

diff --git a/CHANGES b/CHANGES
index 1fbe3b30ed4a3662d3137713d3f4ba00b0c7f597..15c927720c51e42dab9fd990fcddc1abb8af2923 100644 (file)
--- 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 d750fb57b158e68ee36d8a9a7c241ad460fa9ecb..efd2dbf0bdd41d932315541a67986218b87f2f68 100644 (file)
--- 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]