diff options
| author | Daniel Stenberg <daniel@haxx.se> | 2016-04-24 17:52:18 +0200 |
|---|---|---|
| committer | Daniel Stenberg <daniel@haxx.se> | 2016-05-17 14:48:17 +0200 |
| commit | 6efd2fa529a189bf41736a610f6184cd8ad94b4d (patch) | |
| tree | 2172e87706b045a5e8d9ea412c6bce9b2b33f86a /lib/vtls/mbedtls.c | |
| parent | 5db313985e502e82a3eed03396ee600b726d60c2 (diff) | |
mbedtls/polarssl: set "hostname" unconditionally
...as otherwise the TLS libs will skip the CN/SAN check and just allow
connection to any server. curl previously skipped this function when SNI
wasn't used or when connecting to an IP address specified host.
CVE-2016-3739
Bug: https://curl.haxx.se/docs/adv_20160518A.html
Reported-by: Moti Avrahami
Diffstat (limited to 'lib/vtls/mbedtls.c')
| -rw-r--r-- | lib/vtls/mbedtls.c | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/lib/vtls/mbedtls.c b/lib/vtls/mbedtls.c index f0048ef49..6fc7214ac 100644 --- a/lib/vtls/mbedtls.c +++ b/lib/vtls/mbedtls.c @@ -391,13 +391,12 @@ mbed_connect_step1(struct connectdata *conn, mbedtls_ssl_conf_own_cert(&connssl->config, &connssl->clicert, &connssl->pk); } - if(!Curl_inet_pton(AF_INET, conn->host.name, &addr) && -#ifdef ENABLE_IPV6 - !Curl_inet_pton(AF_INET6, conn->host.name, &addr) && -#endif - sni && mbedtls_ssl_set_hostname(&connssl->ssl, conn->host.name)) { - infof(data, "WARNING: failed to configure " - "server name indication (SNI) TLS extension\n"); + if(mbedtls_ssl_set_hostname(&connssl->ssl, conn->host.name)) { + /* mbedtls_ssl_set_hostname() sets the name to use in CN/SAN checks *and* + the name to set in the SNI extension. So even if curl connects to a + host specified as an IP address, this function must be used. */ + failf(data, "couldn't set hostname in mbedTLS"); + return CURLE_SSL_CONNECT_ERROR; } #ifdef HAS_ALPN |