diff options
| author | emboss <emboss@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2012-02-09 17:04:41 +0000 |
|---|---|---|
| committer | emboss <emboss@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2012-02-09 17:04:41 +0000 |
| commit | 0234bcfd19aa0a7b4152809c13554144b7322f41 (patch) | |
| tree | 42ef5db0dff392cca41022362251b4d1efa156e5 /ChangeLog | |
| parent | 4f193625c3752e2e144746f66b43703a38e4fd72 (diff) | |
* backport r34482 from trunk
* ext/openssl/ossl_ssl.c: Add SSL constants and allow to unset SSL
option to prevent BEAST attack. See [Bug #5353].
In OpenSSL, OP_DONT_INSERT_EMPTY_FRAGMENTS is used to prevent
TLS-CBC-IV vulunerability described at
http://www.openssl.org/~bodo/tls-cbc.txt
It's known issue of TLSv1/SSLv3 but it attracts lots of attention
these days as BEAST attack. (CVE-2011-3389)
Until now ossl sets OP_ALL at SSLContext allocation and call
SSL_CTX_set_options at connection. SSL_CTX_set_options updates the
value by using |= so bits set by OP_ALL cannot be unset afterwards.
This commit changes to call SSL_CTX_set_options only 1 time for each
SSLContext. It sets the specified value if SSLContext#options= are
called and sets OP_ALL if not.
To help users to unset bits in OP_ALL, this commit also adds several
constant to SSL such as
OpenSSL::SSL::OP_DONT_INSERT_EMPTY_FRAGMENTS. These constants were
not exposed in Ruby because there's no way to unset bits in OP_ALL
before.
Following is an example to enable 0/n split for BEAST prevention.
ctx.options = OP_ALL & ~OP_DONT_INSERT_EMPTY_FRAGMENTS
* test/openssl/test_ssl.rb: Test above option exists.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_3@34524 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'ChangeLog')
| -rw-r--r-- | ChangeLog | 32 |
1 files changed, 32 insertions, 0 deletions
@@ -1,3 +1,35 @@ +Fri Feb 9 01:36:19 2012 Martin Bosslet <Martin.Bosslet@googlemail.com> + + * backport r34482 from trunk + + * ext/openssl/ossl_ssl.c: Add SSL constants and allow to unset SSL + option to prevent BEAST attack. See [Bug #5353]. + + In OpenSSL, OP_DONT_INSERT_EMPTY_FRAGMENTS is used to prevent + TLS-CBC-IV vulunerability described at + http://www.openssl.org/~bodo/tls-cbc.txt + It's known issue of TLSv1/SSLv3 but it attracts lots of attention + these days as BEAST attack. (CVE-2011-3389) + + Until now ossl sets OP_ALL at SSLContext allocation and call + SSL_CTX_set_options at connection. SSL_CTX_set_options updates the + value by using |= so bits set by OP_ALL cannot be unset afterwards. + This commit changes to call SSL_CTX_set_options only 1 time for each + SSLContext. It sets the specified value if SSLContext#options= are + called and sets OP_ALL if not. + + To help users to unset bits in OP_ALL, this commit also adds several + constant to SSL such as + OpenSSL::SSL::OP_DONT_INSERT_EMPTY_FRAGMENTS. These constants were + not exposed in Ruby because there's no way to unset bits in OP_ALL + before. + + Following is an example to enable 0/n split for BEAST prevention. + + ctx.options = OP_ALL & ~OP_DONT_INSERT_EMPTY_FRAGMENTS + + * test/openssl/test_ssl.rb: Test above option exists. + Thu Feb 9 17:08:20 2012 CHIKANAGA Tomoyuki <nagachika00@gmail.com> * cont.c (cont_mark): mark original Thread object from saved_thread. |