File openssl-CVE-2018-0732.patch of Package compat-openssl098.28468
From 91f7361f47b082ae61ffe1a7b17bb2adf213c7fe Mon Sep 17 00:00:00 2001
From: Guido Vranken <guidovranken@gmail.com>
Date: Mon, 11 Jun 2018 19:38:54 +0200
Subject: [PATCH] Reject excessively large primes in DH key generation.
CVE-2018-0732
Signed-off-by: Guido Vranken <guidovranken@gmail.com>
Reviewed-by: Matthias St. Pierre <Matthias.St.Pierre@ncp-e.com>
Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/6457)
---
crypto/dh/dh_key.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
Index: openssl-0.9.8j/crypto/dh/dh_key.c
===================================================================
--- openssl-0.9.8j.orig/crypto/dh/dh_key.c
+++ openssl-0.9.8j/crypto/dh/dh_key.c
@@ -105,10 +105,15 @@ static int generate_key(DH *dh)
int ok=0;
int generate_new_key=0;
unsigned l;
- BN_CTX *ctx;
+ BN_CTX *ctx = NULL;
BN_MONT_CTX *mont=NULL;
BIGNUM *pub_key=NULL,*priv_key=NULL;
+ if (BN_num_bits(dh->p) > OPENSSL_DH_MAX_MODULUS_BITS) {
+ DHerr(DH_F_GENERATE_KEY, DH_R_MODULUS_TOO_LARGE);
+ return 0;
+ }
+
ctx = BN_CTX_new();
if (ctx == NULL) goto err;
