wpa_supplicant-2.10-Drop-security-level-to-0-with-OpenSSL-3.0-wh.patch (2386B)
1 From: Jouni Malinen <j@w1.fi> 2 Date: Sun, 22 May 2022 17:01:35 +0300 3 Subject: OpenSSL: Drop security level to 0 with OpenSSL 3.0 when using TLS 1.0/1.1 4 5 Commit 9afb68b03976 ("OpenSSL: Allow systemwide secpolicy overrides for 6 TLS version") with commit 58bbcfa31b18 ("OpenSSL: Update security level 7 drop for TLS 1.0/1.1 with OpenSSL 3.0") allow this workaround to be 8 enabled with an explicit network configuration parameter. However, the 9 default settings are still allowing TLS 1.0 and 1.1 to be negotiated 10 just to see them fail immediately when using OpenSSL 3.0. This is not 11 exactly helpful especially when the OpenSSL error message for this 12 particular case is "internal error" which does not really say anything 13 about the reason for the error. 14 15 It is is a bit inconvenient to update the security policy for this 16 particular issue based on the negotiated TLS version since that happens 17 in the middle of processing for the first message from the server. 18 However, this can be done by using the debug callback for printing out 19 the received TLS messages during processing. 20 21 Drop the OpenSSL security level to 0 if that is the only option to 22 continue the TLS negotiation, i.e., when TLS 1.0/1.1 are still allowed 23 in wpa_supplicant default configuration and OpenSSL 3.0 with the 24 constraint on MD5-SHA1 use. 25 26 Signed-off-by: Jouni Malinen <j@w1.fi> 27 28 Bug-Debian: https://bugs.debian.org/1011121 29 Bug-Ubuntu: https://bugs.launchpad.net/bugs/1958267 30 Origin: upstream, commit:bc99366f9b960150aa2e369048bbc2218c1d414e 31 --- 32 src/crypto/tls_openssl.c | 9 +++++++++ 33 1 file changed, 9 insertions(+) 34 35 diff --git a/src/crypto/tls_openssl.c b/src/crypto/tls_openssl.c 36 index 6602ac64f591..78621d926dab 100644 37 --- a/src/crypto/tls_openssl.c 38 +++ b/src/crypto/tls_openssl.c 39 @@ -1557,6 +1557,15 @@ static void tls_msg_cb(int write_p, int version, int content_type, 40 struct tls_connection *conn = arg; 41 const u8 *pos = buf; 42 43 +#if OPENSSL_VERSION_NUMBER >= 0x30000000L 44 + if ((SSL_version(ssl) == TLS1_VERSION || 45 + SSL_version(ssl) == TLS1_1_VERSION) && 46 + SSL_get_security_level(ssl) > 0) { 47 + wpa_printf(MSG_DEBUG, 48 + "OpenSSL: Drop security level to 0 to allow TLS 1.0/1.1 use of MD5-SHA1 signature algorithm"); 49 + SSL_set_security_level(ssl, 0); 50 + } 51 +#endif /* OpenSSL version >= 3.0 */ 52 if (write_p == 2) { 53 wpa_printf(MSG_DEBUG, 54 "OpenSSL: session ver=0x%x content_type=%d", 55 -- 56 2.39.0 57