openssl: Disable SSLv3 and SSLv2 by default
authorMichael Tremer <michael.tremer@ipfire.org>
Thu, 12 Mar 2015 11:55:40 +0000 (12:55 +0100)
committerMichael Tremer <michael.tremer@ipfire.org>
Thu, 12 Mar 2015 11:55:40 +0000 (12:55 +0100)
This patch will disable SSLv3 and SSLv2 by default but leaves
the protocol compiled in into the library so that applications
can use it when they still need it (e.g. sslscan).

lfs/openssl
src/patches/openssl-disable-sslv2-sslv3.patch [new file with mode: 0644]

index eae2c6e..df068f3 100644 (file)
@@ -86,6 +86,7 @@ $(TARGET) : $(patsubst %,$(DIR_DL)/%,$(objects))
        cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/openssl-1.0.1e-cryptodev.patch
        cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/openssl-1.0.1e-fix_parallel_build-1.patch
        cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/openssl-1.0.1e-weak-ciphers.patch
+       cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/openssl-disable-sslv2-sslv3.patch
 
        cd $(DIR_APP) && find crypto/ -name Makefile -exec \
                sed 's/^ASFLAGS=/&-Wa,--noexecstack /' -i {} \;
diff --git a/src/patches/openssl-disable-sslv2-sslv3.patch b/src/patches/openssl-disable-sslv2-sslv3.patch
new file mode 100644 (file)
index 0000000..ebf5429
--- /dev/null
@@ -0,0 +1,13 @@
+diff -up openssl-1.0.1h/ssl/ssl_lib.c.v2v3 openssl-1.0.1h/ssl/ssl_lib.c\r
+--- openssl-1.0.1h/ssl/ssl_lib.c.v2v3  2014-06-11 16:02:52.000000000 +0200\r
++++ openssl-1.0.1h/ssl/ssl_lib.c       2014-06-30 14:18:04.290248080 +0200\r
+@@ -1875,6 +1875,9 @@ SSL_CTX *SSL_CTX_new(const SSL_METHOD *m\r
+        */\r
+       ret->options |= SSL_OP_LEGACY_SERVER_CONNECT;\r
\r
++      /* Disable SSLv2 and SSLv3 by default (affects the SSLv23_method() only) */\r
++      ret->options |= SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3;\r
++\r
+       return(ret);\r
+ err:\r
+       SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);\r