From 78c318112b763dcb97b2fb2ff1c92e5475226c85 Mon Sep 17 00:00:00 2001 From: delphij Date: Tue, 7 Jan 2014 20:04:41 +0000 Subject: MFC r260403 (MFV r260399): Apply vendor commits: 197e0ea Fix for TLS record tampering bug. (CVE-2013-4353). 3462896 For DTLS we might need to retransmit messages from the previous session so keep a copy of write context in DTLS retransmission buffers instead of replacing it after sending CCS. (CVE-2013-6450). ca98926 When deciding whether to use TLS 1.2 PRF and record hash algorithms use the version number in the corresponding SSL_METHOD structure instead of the SSL structure. The SSL structure version is sometimes inaccurate. Note: OpenSSL 1.0.2 and later effectively do this already. (CVE-2013-6449). Security: CVE-2013-4353 Security: CVE-2013-6449 Security: CVE-2013-6450 --- crypto/openssl/ssl/d1_both.c | 6 ++++++ crypto/openssl/ssl/s3_both.c | 6 +++++- crypto/openssl/ssl/s3_lib.c | 2 +- crypto/openssl/ssl/ssl_locl.h | 2 ++ crypto/openssl/ssl/t1_enc.c | 17 +++++++++++------ 5 files changed, 25 insertions(+), 8 deletions(-) (limited to 'crypto') diff --git a/crypto/openssl/ssl/d1_both.c b/crypto/openssl/ssl/d1_both.c index de8bab8..4c8c77f 100644 --- a/crypto/openssl/ssl/d1_both.c +++ b/crypto/openssl/ssl/d1_both.c @@ -214,6 +214,12 @@ dtls1_hm_fragment_new(unsigned long frag_len, int reassembly) static void dtls1_hm_fragment_free(hm_fragment *frag) { + + if (frag->msg_header.is_ccs) + { + EVP_CIPHER_CTX_free(frag->msg_header.saved_retransmit_state.enc_write_ctx); + EVP_MD_CTX_destroy(frag->msg_header.saved_retransmit_state.write_hash); + } if (frag->fragment) OPENSSL_free(frag->fragment); if (frag->reassembly) OPENSSL_free(frag->reassembly); OPENSSL_free(frag); diff --git a/crypto/openssl/ssl/s3_both.c b/crypto/openssl/ssl/s3_both.c index ead01c8..ae0ee27 100644 --- a/crypto/openssl/ssl/s3_both.c +++ b/crypto/openssl/ssl/s3_both.c @@ -208,7 +208,11 @@ static void ssl3_take_mac(SSL *s) { const char *sender; int slen; - + /* If no new cipher setup return immediately: other functions will + * set the appropriate error. + */ + if (s->s3->tmp.new_cipher == NULL) + return; if (s->state & SSL_ST_CONNECT) { sender=s->method->ssl3_enc->server_finished_label; diff --git a/crypto/openssl/ssl/s3_lib.c b/crypto/openssl/ssl/s3_lib.c index e7c5dcb..3291e3d 100644 --- a/crypto/openssl/ssl/s3_lib.c +++ b/crypto/openssl/ssl/s3_lib.c @@ -4274,7 +4274,7 @@ need to go to SSL_ST_ACCEPT. long ssl_get_algorithm2(SSL *s) { long alg2 = s->s3->tmp.new_cipher->algorithm2; - if (TLS1_get_version(s) >= TLS1_2_VERSION && + if (s->method->version == TLS1_2_VERSION && alg2 == (SSL_HANDSHAKE_MAC_DEFAULT|TLS1_PRF)) return SSL_HANDSHAKE_MAC_SHA256 | TLS1_PRF_SHA256; return alg2; diff --git a/crypto/openssl/ssl/ssl_locl.h b/crypto/openssl/ssl/ssl_locl.h index 1b98947..ada8008 100644 --- a/crypto/openssl/ssl/ssl_locl.h +++ b/crypto/openssl/ssl/ssl_locl.h @@ -621,6 +621,8 @@ extern SSL3_ENC_METHOD TLSv1_enc_data; extern SSL3_ENC_METHOD SSLv3_enc_data; extern SSL3_ENC_METHOD DTLSv1_enc_data; +#define SSL_IS_DTLS(s) (s->method->version == DTLS1_VERSION) + #define IMPLEMENT_tls_meth_func(version, func_name, s_accept, s_connect, \ s_get_meth) \ const SSL_METHOD *func_name(void) \ diff --git a/crypto/openssl/ssl/t1_enc.c b/crypto/openssl/ssl/t1_enc.c index 809ad2e..b1a803d 100644 --- a/crypto/openssl/ssl/t1_enc.c +++ b/crypto/openssl/ssl/t1_enc.c @@ -414,15 +414,20 @@ int tls1_change_cipher_state(SSL *s, int which) s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_STREAM; else s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_STREAM; - if (s->enc_write_ctx != NULL) + if (s->enc_write_ctx != NULL && !SSL_IS_DTLS(s)) reuse_dd = 1; - else if ((s->enc_write_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL) + else if ((s->enc_write_ctx=EVP_CIPHER_CTX_new()) == NULL) goto err; - else - /* make sure it's intialized in case we exit later with an error */ - EVP_CIPHER_CTX_init(s->enc_write_ctx); dd= s->enc_write_ctx; - mac_ctx = ssl_replace_hash(&s->write_hash,NULL); + if (SSL_IS_DTLS(s)) + { + mac_ctx = EVP_MD_CTX_create(); + if (!mac_ctx) + goto err; + s->write_hash = mac_ctx; + } + else + mac_ctx = ssl_replace_hash(&s->write_hash,NULL); #ifndef OPENSSL_NO_COMP if (s->compress != NULL) { -- cgit v1.1