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Description: CVE-2016-0787: Truncated Difffie-Hellman secret length
Convert bytes to bits in diffie_hellman_sha1. Otherwise we get far too
small numbers.
Origin: backport, http://www.libssh2.org/CVE-2016-0787.patch
Forwarded: not-needed
Author: Daniel Stenberg <daniel@haxx.se>
Reviewed-by: Salvatore Bonaccorso <carnil@debian.org>
Last-Update: 2016-02-18
Applied-Upstream: 1.7.0
---
--- a/src/kex.c
+++ b/src/kex.c
@@ -103,7 +103,7 @@ static int diffie_hellman_sha1(LIBSSH2_S
memset(&exchange_state->req_state, 0, sizeof(packet_require_state_t));
/* Generate x and e */
- _libssh2_bn_rand(exchange_state->x, group_order, 0, -1);
+ _libssh2_bn_rand(exchange_state->x, group_order * 8 - 1, 0, -1);
_libssh2_bn_mod_exp(exchange_state->e, g, exchange_state->x, p,
exchange_state->ctx);
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