我正在尝试在配备 ARMv7 处理器的 Synology DS215j 上安装 ruby​​ 2.2.4 或 2.3.0。我用了optware-ng安装 gcc、make、openssl、openssl-dev 和 zlib。我根据 README 中的说明安装了 rbenv(版本 1.0.0-19-g29b4da7)和 ruby​​-build 插件。 .

这些是随 optware-ng 安装的软件包及其版本

binutils - 2.25.1-1
gcc - 5.3.0-6
gconv-modules - 2.21-3
glibc-opt - 2.21-4
libc-dev - 2.21-1
libgmp - 6.0.0a-1
libmpc - 1.0.2-1
libmpfr - 3.1.3-1
libnsl - 2.21-3
libstdc++ - 6.0.21-6
make - 4.1-1
ncurses - 5.7-4
openssl - 1.0.2f-1
openssl-dev - 1.0.2f-1
readline - 6.1-2
ruby - 2.2.0-1
screen - 4.2.1-2
termcap - 1.3.1-3
zlib - 1.2.8-2

当我在这两种情况下运行 rbenv install 2.2.4 或 rbenv install 2.3.0 时，构建失败并显示错误消息“undefined symbol: SSLv2_method”。这是 2.2.4 版本的错误:

installing bundle gems:       /var/services/homes/florian/.rbenv/versions/2.2.4/lib/ruby/gems/2.2.0 (build_info, cache, doc, extensions, gems, specifications)
/tmp/ruby-build.20160329115213.2672/ruby-2.2.4/lib/rubygems/core_ext/kernel_require.rb:54:in `require': /tmp/ruby-build.20160329115213.2672/ruby-2.2.4/.ext/armv7l-linux-eabihf/openssl.so: undefined symbol: SSLv2_method - /tmp/ruby-build.20160329115213.2672/ruby-2.2.4/.ext/armv7l-linux-eabihf/openssl.so (LoadError)
    from /tmp/ruby-build.20160329115213.2672/ruby-2.2.4/lib/rubygems/core_ext/kernel_require.rb:54:in `require'
    from /tmp/ruby-build.20160329115213.2672/ruby-2.2.4/.ext/common/openssl.rb:17:in `<top (required)>'
    from /tmp/ruby-build.20160329115213.2672/ruby-2.2.4/lib/rubygems/core_ext/kernel_require.rb:54:in `require'
    from /tmp/ruby-build.20160329115213.2672/ruby-2.2.4/lib/rubygems/core_ext/kernel_require.rb:54:in `require'
    from /tmp/ruby-build.20160329115213.2672/ruby-2.2.4/lib/rubygems/security.rb:11:in `<top (required)>'
    from /tmp/ruby-build.20160329115213.2672/ruby-2.2.4/lib/rubygems/core_ext/kernel_require.rb:54:in `require'
    from /tmp/ruby-build.20160329115213.2672/ruby-2.2.4/lib/rubygems/core_ext/kernel_require.rb:54:in `require'
    from /tmp/ruby-build.20160329115213.2672/ruby-2.2.4/lib/rubygems/package.rb:43:in `<top (required)>'
    from /tmp/ruby-build.20160329115213.2672/ruby-2.2.4/lib/rubygems/core_ext/kernel_require.rb:54:in `require'
    from /tmp/ruby-build.20160329115213.2672/ruby-2.2.4/lib/rubygems/core_ext/kernel_require.rb:54:in `require'
    from /tmp/ruby-build.20160329115213.2672/ruby-2.2.4/lib/rubygems/dependency_installer.rb:3:in `<top (required)>'
    from /tmp/ruby-build.20160329115213.2672/ruby-2.2.4/lib/rubygems/core_ext/kernel_require.rb:54:in `require'
    from /tmp/ruby-build.20160329115213.2672/ruby-2.2.4/lib/rubygems/core_ext/kernel_require.rb:54:in `require'
    from /tmp/ruby-build.20160329115213.2672/ruby-2.2.4/lib/rubygems.rb:556:in `install'
    from ./tool/rbinstall.rb:722:in `block (2 levels) in <main>'
    from ./tool/rbinstall.rb:721:in `each'
    from ./tool/rbinstall.rb:721:in `block in <main>'
    from ./tool/rbinstall.rb:757:in `call'
    from ./tool/rbinstall.rb:757:in `block in <main>'
    from ./tool/rbinstall.rb:754:in `each'
    from ./tool/rbinstall.rb:754:in `<main>'
uncommon.mk:246: recipe for target 'do-install-all' failed
make: *** [do-install-all] Error 1

这好像跟rubygems里面的东西有关。

有趣的是，我尝试自己构建 ruby​​ 的原因是，当我尝试安装 gems 时，Synology 6 附带的 ruby​​ 版本返回了类似的错误:

florian@synology:~/.rbenv/plugins$ /usr/bin/gem install rails
ERROR:  Loading command: install (LoadError)
        /usr/lib/ruby/2.3.0/armle-linux-gnu/openssl.so: undefined symbol: SSLv2_method - /usr/lib/ruby/2.3.0/armle-linux-gnu/openssl.so
ERROR:  While executing gem ... (NoMethodError)
    undefined method `invoke_with_build_args' for nil:NilClass

什么可能导致这些问题，我该如何解决？

最佳答案

When I run rbenv install 2.2.4 or rbenv install 2.3.0 in both cases the build fails with the error message "undefined symbol: SSLv2_method"...

What could cause these issues ...

由于 CVE-2016-0800，SSLv2 设备已于 3 月从 OpenSSL 中完全删除。 (DROWN Attack)。

我认为完全删除有点苛刻，因为您正在经历这种影响。应该有一个警告和过渡期。而且它应该发生在 10 年前左右。

我认为 SSLv2_method 不是因为 DROWN 而完全移除, SSLv2_client_method和 SSLv2_server_method应该设置适当的错误代码，如 ERR_R_REMOVED_INSECURE并返回 NULL。 <openssl/opensslconf.h>应该无条件设置OPENSSL_NO_SSL2还有。

OpenSSL 意识到他们破坏了 ABI 兼容性并使用 Commit 133138569f37d149 将符号添加回 1.0.2| .入住时提供了符号 SSLv2_method , SSLv2_client_method和 SSLv2_server_method再次，但他们返回 NULL 而不设置错误代码。他们也没有定义 OPENSSL_NO_SSL2 .另见 [openssl.org #4398] BUG / 1.0.2g breaks CURL extension .

SSLv2 已经不安全 15 或 20 年了。像 Ruby 这样的包不应该引用这些符号。您应该提交针对 Ruby 的安全错误报告以引用该符号。

... and how could I resolve them?

要解决此问题，我认为您需要 (1) 等待 OpenSSL 1.0.2h，(2) 手动修补 OpenSSL 1.0.2g，或 (3) 删除对 SSLv2_method 的所有 Ruby 引用, SSLv2_client_method和 SSLv2_server_method .

这里是(2)需要的补丁，手动给OpenSSL 1.0.2g打补丁:

diff --git a/ssl/s2_meth.c b/ssl/s2_meth.c
index b312f17..d46e2f5 100644
--- a/ssl/s2_meth.c
+++ b/ssl/s2_meth.c
@@ -74,8 +74,8 @@ IMPLEMENT_ssl2_meth_func(SSLv2_method,
                          ssl2_accept, ssl2_connect, ssl2_get_method)
 #else                           /* !OPENSSL_NO_SSL2 */

-# if PEDANTIC
-static void *dummy = &dummy;
-# endif
+SSL_METHOD *SSLv2_method(void) { return NULL; }
+SSL_METHOD *SSLv2_client_method(void) { return NULL; }
+SSL_METHOD *SSLv2_server_method(void) { return NULL; }

 #endif 

您还应该至少使用 no-ssl2 no-ssl3 no-comp 配置和编译 OpenSSL标志，因为它们是已知的安全问题。配置选项定义 OPENSSL_NO_SSL2 , OPENSSL_NO_SSL3和 OPENSSL_NO_COMP在 <openssl/opensslconf.h> .

关于ruby - 使用 rbenv 和 ruby​​-build 构建 ruby​​ 失败，出现 undefined symbol : SSLv2_method，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/36286437/