summaryrefslogtreecommitdiff
path: root/openssl0.9.8/patches/CVE-2010-4180.patch
blob: 019a7806bc421d7f8a6e99b4ff12ea042c08d769 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
diff --git a/doc/ssl/SSL_CTX_set_options.pod b/doc/ssl/SSL_CTX_set_options.pod
index 06025d1..a703ce0 100644
--- a/doc/ssl/SSL_CTX_set_options.pod
+++ b/doc/ssl/SSL_CTX_set_options.pod
@@ -78,18 +78,7 @@ this breaks this server so 16 bytes is the way to go.
 
 =item SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG
 
-ssl3.netscape.com:443, first a connection is established with RC4-MD5.
-If it is then resumed, we end up using DES-CBC3-SHA.  It should be
-RC4-MD5 according to 7.6.1.3, 'cipher_suite'.
-
-Netscape-Enterprise/2.01 (https://merchant.netscape.com) has this bug.
-It only really shows up when connecting via SSLv2/v3 then reconnecting
-via SSLv3. The cipher list changes....
-
-NEW INFORMATION.  Try connecting with a cipher list of just
-DES-CBC-SHA:RC4-MD5.  For some weird reason, each new connection uses
-RC4-MD5, but a re-connect tries to use DES-CBC-SHA.  So netscape, when
-doing a re-connect, always takes the first cipher in the cipher list.
+As of OpenSSL 0.9.8q and 1.0.0c, this option has no effect.
 
 =item SSL_OP_SSLREF2_REUSE_CERT_TYPE_BUG
 
diff --git a/ssl/s3_clnt.c b/ssl/s3_clnt.c
index f0995b9..a7cb7a1 100644
--- a/ssl/s3_clnt.c
+++ b/ssl/s3_clnt.c
@@ -814,8 +814,11 @@ int ssl3_get_server_hello(SSL *s)
 		s->session->cipher_id = s->session->cipher->id;
 	if (s->hit && (s->session->cipher_id != c->id))
 		{
+/* Workaround is now obsolete */
+#if 0
 		if (!(s->options &
 			SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
+#endif
 			{
 			al=SSL_AD_ILLEGAL_PARAMETER;
 			SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
diff --git a/ssl/s3_srvr.c b/ssl/s3_srvr.c
index e696450..e2d570f 100644
--- a/ssl/s3_srvr.c
+++ b/ssl/s3_srvr.c
@@ -927,6 +927,10 @@ int ssl3_get_client_hello(SSL *s)
 				break;
 				}
 			}
+/* Disabled because it can be used in a ciphersuite downgrade
+ * attack: CVE-2010-4180.
+ */
+#if 0
 		if (j == 0 && (s->options & SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG) && (sk_SSL_CIPHER_num(ciphers) == 1))
 			{
 			/* Special case as client bug workaround: the previously used cipher may
@@ -941,6 +945,7 @@ int ssl3_get_client_hello(SSL *s)
 				j = 1;
 				}
 			}
+#endif
 		if (j == 0)
 			{
 			/* we need to have the cipher in the cipher