Blame CVE-2016-0787.patch
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From 8a453a7b0f1e667b7369eb73b00843a8decdecc9 Mon Sep 17 00:00:00 2001
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From: Daniel Stenberg <daniel@haxx.se>
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Date: Thu, 11 Feb 2016 13:52:20 +0100
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Subject: [PATCH] diffie_hellman_sha256: convert bytes to bits
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As otherwise we get far too small numbers.
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CVE-2016-0787
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---
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src/kex.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/src/kex.c b/src/kex.c
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index 6349457..e89b36c 100644
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--- a/src/kex.c
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+++ b/src/kex.c
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@@ -751,11 +751,11 @@ static int diffie_hellman_sha256(LIBSSH2_SESSION *session,
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/* Zero the whole thing out */
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memset(&exchange_state->req_state, 0, sizeof(packet_require_state_t));
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/* Generate x and e */
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- _libssh2_bn_rand(exchange_state->x, group_order, 0, -1);
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+ _libssh2_bn_rand(exchange_state->x, group_order * 8 - 1, 0, -1);
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_libssh2_bn_mod_exp(exchange_state->e, g, exchange_state->x, p,
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exchange_state->ctx);
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/* Send KEX init */
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/* packet_type(1) + String Length(4) + leading 0(1) */
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--
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2.7.0
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