Loading CHANGES +22 −0 Original line number Diff line number Diff line Loading @@ -190,6 +190,28 @@ issues, has been replaced to always returns NULL. [Rich Salz] Changes between 1.1.0g and 1.1.0h [xx XXX xxxx] *) rsaz_1024_mul_avx2 overflow bug on x86_64 There is an overflow bug in the AVX2 Montgomery multiplication procedure used in exponentiation with 1024-bit moduli. No EC algorithms are affected. 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 DH1024 are considered just feasible, 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 DH1024 private key among multiple clients, which is no longer an option since CVE-2016-0701. This only affects processors that support the AVX2 but not ADX extensions like Intel Haswell (4th generation). This issue was reported to OpenSSL by David Benjamin (Google). The issue was originally found via the OSS-Fuzz project. (CVE-2017-3738) [Andy Polyakov] Changes between 1.1.0f and 1.1.0g [2 Nov 2017] Loading NEWS +4 −0 Original line number Diff line number Diff line Loading @@ -11,6 +11,10 @@ o Add a STORE module (OSSL_STORE) o Claim the namespaces OSSL and OPENSSL, represented as symbol prefixes Major changes between OpenSSL 1.1.0g and OpenSSL 1.1.0h [under development] o rsaz_1024_mul_avx2 overflow bug on x86_64 (CVE-2017-3738) Major changes between OpenSSL 1.1.0f and OpenSSL 1.1.0g [2 Nov 2017] o bn_sqrx8x_internal carry bug on x86_64 (CVE-2017-3736) Loading Loading
CHANGES +22 −0 Original line number Diff line number Diff line Loading @@ -190,6 +190,28 @@ issues, has been replaced to always returns NULL. [Rich Salz] Changes between 1.1.0g and 1.1.0h [xx XXX xxxx] *) rsaz_1024_mul_avx2 overflow bug on x86_64 There is an overflow bug in the AVX2 Montgomery multiplication procedure used in exponentiation with 1024-bit moduli. No EC algorithms are affected. 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 DH1024 are considered just feasible, 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 DH1024 private key among multiple clients, which is no longer an option since CVE-2016-0701. This only affects processors that support the AVX2 but not ADX extensions like Intel Haswell (4th generation). This issue was reported to OpenSSL by David Benjamin (Google). The issue was originally found via the OSS-Fuzz project. (CVE-2017-3738) [Andy Polyakov] Changes between 1.1.0f and 1.1.0g [2 Nov 2017] Loading
NEWS +4 −0 Original line number Diff line number Diff line Loading @@ -11,6 +11,10 @@ o Add a STORE module (OSSL_STORE) o Claim the namespaces OSSL and OPENSSL, represented as symbol prefixes Major changes between OpenSSL 1.1.0g and OpenSSL 1.1.0h [under development] o rsaz_1024_mul_avx2 overflow bug on x86_64 (CVE-2017-3738) Major changes between OpenSSL 1.1.0f and OpenSSL 1.1.0g [2 Nov 2017] o bn_sqrx8x_internal carry bug on x86_64 (CVE-2017-3736) Loading