check length sanity before correcting in EVP_CTRL_AEAD_TLS1_AAD

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3276)

diff --git a/crypto/evp/e_aes.c b/crypto/evp/e_aes.c
index 47fcd82077fad5fa13ed3eb09088a2ffd602ed89..b45b364466acb8b0b9d0663ac35a72dc3d916e7f 100644 (file)
--- a/crypto/evp/e_aes.c
+++ b/crypto/evp/e_aes.c
@@ -1237,10 +1237,15 @@ static int aes_gcm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
         {
             unsigned int len = c->buf[arg - 2] << 8 | c->buf[arg - 1];
             /* Correct length for explicit IV */
+            if (len < EVP_GCM_TLS_EXPLICIT_IV_LEN)
+                return 0;
             len -= EVP_GCM_TLS_EXPLICIT_IV_LEN;
             /* If decrypting correct for tag too */
-            if (!c->encrypt)
+            if (!c->encrypt) {
+                if (len < EVP_GCM_TLS_TAG_LEN)
+                    return 0;
                 len -= EVP_GCM_TLS_TAG_LEN;
+            }
             c->buf[arg - 2] = len >> 8;
             c->buf[arg - 1] = len & 0xff;
         }

diff --git a/crypto/evp/e_aes_cbc_hmac_sha1.c b/crypto/evp/e_aes_cbc_hmac_sha1.c
index 6dfd590a4a2c8e2d58ac40927a62874cdd3720df..d114710e98ec4eb2080c502d4c9bc1f220d8184e 100644 (file)
--- a/crypto/evp/e_aes_cbc_hmac_sha1.c
+++ b/crypto/evp/e_aes_cbc_hmac_sha1.c
@@ -859,6 +859,8 @@ static int aesni_cbc_hmac_sha1_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg,
                 key->payload_length = len;
                 if ((key->aux.tls_ver =
                      p[arg - 4] << 8 | p[arg - 3]) >= TLS1_1_VERSION) {
+                    if (len < AES_BLOCK_SIZE)
+                        return 0;
                     len -= AES_BLOCK_SIZE;
                     p[arg - 2] = len >> 8;
                     p[arg - 1] = len;

diff --git a/crypto/evp/e_aes_cbc_hmac_sha256.c b/crypto/evp/e_aes_cbc_hmac_sha256.c
index 8422aeee00d6f9197d9b678519b82dc2f4b396fd..917ae0751dee3fd31cab363a0ad9588c50513c5c 100644 (file)
--- a/crypto/evp/e_aes_cbc_hmac_sha256.c
+++ b/crypto/evp/e_aes_cbc_hmac_sha256.c
@@ -836,6 +836,8 @@ static int aesni_cbc_hmac_sha256_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg,
                 key->payload_length = len;
                 if ((key->aux.tls_ver =
                      p[arg - 4] << 8 | p[arg - 3]) >= TLS1_1_VERSION) {
+                    if (len < AES_BLOCK_SIZE)
+                        return 0;
                     len -= AES_BLOCK_SIZE;
                     p[arg - 2] = len >> 8;
                     p[arg - 1] = len;