diff options
Diffstat (limited to 'main/openssl/CVE-2016-6302.patch')
-rw-r--r-- | main/openssl/CVE-2016-6302.patch | 51 |
1 files changed, 0 insertions, 51 deletions
diff --git a/main/openssl/CVE-2016-6302.patch b/main/openssl/CVE-2016-6302.patch deleted file mode 100644 index fde58dee9b..0000000000 --- a/main/openssl/CVE-2016-6302.patch +++ /dev/null @@ -1,51 +0,0 @@ -From baaabfd8fdcec04a691695fad9a664bea43202b6 Mon Sep 17 00:00:00 2001 -From: "Dr. Stephen Henson" <steve@openssl.org> -Date: Tue, 23 Aug 2016 18:14:54 +0100 -Subject: [PATCH] Sanity check ticket length. - -If a ticket callback changes the HMAC digest to SHA512 the existing -sanity checks are not sufficient and an attacker could perform a DoS -attack with a malformed ticket. Add additional checks based on -HMAC size. - -Thanks to Shi Lei for reporting this bug. - -CVE-2016-6302 - -Reviewed-by: Rich Salz <rsalz@openssl.org> ---- - ssl/t1_lib.c | 11 ++++++++--- - 1 file changed, 8 insertions(+), 3 deletions(-) - -diff --git a/ssl/t1_lib.c b/ssl/t1_lib.c -index 7d322d0..fbcf2e6 100644 ---- a/ssl/t1_lib.c -+++ b/ssl/t1_lib.c -@@ -3401,9 +3401,7 @@ static int tls_decrypt_ticket(SSL *s, const unsigned char *etick, - HMAC_CTX hctx; - EVP_CIPHER_CTX ctx; - SSL_CTX *tctx = s->initial_ctx; -- /* Need at least keyname + iv + some encrypted data */ -- if (eticklen < 48) -- return 2; -+ - /* Initialize session ticket encryption and HMAC contexts */ - HMAC_CTX_init(&hctx); - EVP_CIPHER_CTX_init(&ctx); -@@ -3437,6 +3435,13 @@ static int tls_decrypt_ticket(SSL *s, const unsigned char *etick, - if (mlen < 0) { - goto err; - } -+ /* Sanity check ticket length: must exceed keyname + IV + HMAC */ -+ if (eticklen <= 16 + EVP_CIPHER_CTX_iv_length(&ctx) + mlen) { -+ HMAC_CTX_cleanup(&hctx); -+ EVP_CIPHER_CTX_cleanup(&ctx); -+ return 2; -+ } -+ - eticklen -= mlen; - /* Check HMAC of encrypted ticket */ - if (HMAC_Update(&hctx, etick, eticklen) <= 0 --- -1.9.1 - |