{"id":18474,"date":"2014-09-26T14:43:35","date_gmt":"2014-09-26T06:43:35","guid":{"rendered":"https:\/\/2blog.ilc.edu.tw\/25793\/2014\/09\/26\/centos-5-x-6-x-7-bash-%e6%bc%8f%e6%b4%9e%e6%aa%a2%e6%b8%ac%e5%8f%8a%e4%bf%ae%e6%ad%a3\/"},"modified":"2021-03-18T17:24:04","modified_gmt":"2021-03-18T09:24:04","slug":"centos-5-x-6-x-7-bash-%e6%bc%8f%e6%b4%9e%e6%aa%a2%e6%b8%ac%e5%8f%8a%e4%bf%ae%e6%ad%a3","status":"publish","type":"post","link":"https:\/\/2blog.ilc.edu.tw\/25793\/2014\/09\/26\/centos-5-x-6-x-7-bash-%e6%bc%8f%e6%b4%9e%e6%aa%a2%e6%b8%ac%e5%8f%8a%e4%bf%ae%e6%ad%a3\/","title":{"rendered":"CentOS 5.x \/ 6.x \/ 7 bash \u6f0f\u6d1e\u6aa2\u6e2c\u53ca\u4fee\u6b63"},"content":{"rendered":"

\u53c3\u8003\u7db2\u7ad9\uff1abash \u6f0f\u6d1e\u6aa2\u6e2c\u8207\u4fee\u88dc \u00ab Jamyy’s Weblog<\/a><\/p>\n

bash \u7684\u6f0f\u6d1e\u9020\u6210\u7684\u5371\u5bb3\uff0c\u8acb\u53c3\u8003\uff1a
MyFirefox | Unix\u4eae\u7d05\u71c8\uff01\u5927\u6f0f\u6d1e\u300cShellshock\u300d\u53ef\u60e1\u610f\u633e\u6301\u96fb\u8166\u7cfb\u7d71<\/a><\/p>\n

CentOS 5.x
# cat \/etc\/redhat-release<\/span>
CentOS release 5.10 (Final)<\/span><\/p>\n

\u76ee\u524d\u5b89\u88dd bash \u5957\u4ef6
# rpm -qa | grep bash<\/span>
bash-3.2-32.el5_9.1<\/span><\/p>\n

bash \u7248\u672c
# bash –version<\/span>
GNU bash, version 3.2.25(1)-release (i386-redhat-linux-gnu)<\/span>
Copyright (C) 2005 Free Software Foundation, Inc.<\/span><\/p>\n

\u6aa2\u67e5\u662f\u5426\u6709\u6f0f\u6d1e(\u6709<\/span>)
# env x='() { :;}; echo vulnerable’ bash -c “echo this is a test”<\/span>
vulnerable<\/span>
this is a test<\/span><\/p>\n

\u66f4\u65b0\u4e4b\u5f8c\u7684 bash \u5957\u4ef6
# rpm -qa | grep bash<\/span>
bash-3.2-33.el5.1<\/span>
\u6216
bash-3.2-33.el5_10.4<\/span><\/p>\n

bash \u7248\u672c
# bash –version<\/span>
GNU bash, version 3.2.25(1)-release (x86_64-redhat-linux-gnu)<\/span>
Copyright (C) 2005 Free Software Foundation, Inc.<\/span><\/p>\n

\u6aa2\u67e5\u662f\u5426\u6709\u6f0f\u6d1e(\u7121<\/span>)
# env x='() { :;}; echo vulnerable’ bash -c “echo this is a test”<\/span>
bash: warning: x: ignoring function definition attempt<\/span>
bash: error importing function definition for `x’<\/span>
this is a test<\/span>[@more@]CentOS 6.x
# cat \/etc\/redhat-release<\/span>
CentOS release 6.5 (Final)<\/span><\/p>\n

bash \u7248\u672c
# bash –version<\/span>
GNU bash, version 4.1.2(1)-release (x86_64-redhat-linux-gnu)<\/span><\/p>\n

\u6aa2\u67e5\u662f\u5426\u6709\u6f0f\u6d1e(\u7121<\/span>)
# env x='() { :;}; echo vulnerable’ bash -c “echo this is a test”<\/span>
bash: warning: x: ignoring function definition attempt<\/span>
bash: \u932f\u8aa4\uff0c\u8f38\u5165\u7684\u51fd\u6578\u5b9a\u7fa9\u70ba `x’<\/span>
this is a test<\/span><\/p>\n

\u66f4\u65b0\u4e4b\u5f8c\u7684 bash \u5957\u4ef6
# rpm -qa | grep bash<\/span>
bash-4.1.2-15.el6_5.2.i686<\/span>
bash-4.1.2-15.el6_5.2.x86_64<\/span><\/p>\n

CentOS 7.x
# cat \/etc\/redhat-release<\/span>
CentOS Linux release 7.0.1406 (Core)<\/span><\/p>\n

\u76ee\u524d\u5b89\u88dd bash \u5957\u4ef6
# rpm -qa | grep bash<\/span>
bash-4.2.45-5.el7.x86_64<\/span>
bash-completion-2.1-6.el7.noarch<\/span><\/p>\n

\u76ee\u524d bash \u7684\u7248\u672c
# bash –version<\/span>
GNU bash, version 4.2.45(1)-release (x86_64-redhat-linux-gnu)<\/span>
Copyright (C) 2011 Free Software Foundation, Inc.<\/span><\/p>\n

\u6aa2\u67e5\u662f\u5426\u6709\u6f0f\u6d1e(\u6709<\/span>)
# env x='() { :;}; echo vulnerable’ bash -c “echo this is a test”<\/span>
vulnerable<\/span>
this is a test<\/span><\/p>\n

\u66f4\u65b0\u4e4b\u5f8c\u7684 bash \u5957\u4ef6
# rpm -qa | grep bash<\/span>
bash-4.2.45-5.el7_0.4.x86_64<\/span>
bash-completion-2.1-6.el7.noarch<\/span><\/p>\n

\u66f4\u65b0\u4e4b\u5f8c\u7684 bash \u7248\u672c
# bash –version<\/span>
GNU bash, version 4.2.45(1)-release (x86_64-redhat-linux-gnu)<\/span><\/p>\n

\u51fa\u73fe\u9019\u6a23\uff0c\u4e0d\u77e5\u9053\u6709\u6c92\u6709\u4fee\u88dc\u5b8c\u6210(?<\/span>)\uff0c\u4f46\u61c9\u8a72\u662f\u6709\u4fee\u6b63\u5b8c\u6210
# env x='() { :;}; echo vulnerable’ bash -c “echo this is a test”<\/span>
this is a test<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

\u53c3\u8003\u7db2\u7ad9\uff1abash \u6f0f\u6d1e\u6aa2\u6e2c\u8207\u4fee\u88dc \u00ab Jamyy’s Weblog bash \u7684\u6f0f\u6d1e\u9020\u6210\u7684\u5371\u5bb3\uff0c … <\/p>\n

\u95b1\u8b80\u5168\u6587\u3008CentOS 5.x \/ 6.x \/ 7 bash \u6f0f\u6d1e\u6aa2\u6e2c\u53ca\u4fee\u6b63\u3009<\/span><\/a><\/p>\n","protected":false},"author":55,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[117,132],"tags":[],"class_list":["post-18474","post","type-post","status-publish","format-standard","hentry","category-c-78462","category-c-78477"],"meta_key":{"_pingme":["1"],"_encloseme":["1"],"lt_post_id":["519790"]},"_links":{"self":[{"href":"https:\/\/2blog.ilc.edu.tw\/25793\/wp-json\/wp\/v2\/posts\/18474"}],"collection":[{"href":"https:\/\/2blog.ilc.edu.tw\/25793\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/2blog.ilc.edu.tw\/25793\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/2blog.ilc.edu.tw\/25793\/wp-json\/wp\/v2\/users\/55"}],"replies":[{"embeddable":true,"href":"https:\/\/2blog.ilc.edu.tw\/25793\/wp-json\/wp\/v2\/comments?post=18474"}],"version-history":[{"count":1,"href":"https:\/\/2blog.ilc.edu.tw\/25793\/wp-json\/wp\/v2\/posts\/18474\/revisions"}],"predecessor-version":[{"id":20116,"href":"https:\/\/2blog.ilc.edu.tw\/25793\/wp-json\/wp\/v2\/posts\/18474\/revisions\/20116"}],"wp:attachment":[{"href":"https:\/\/2blog.ilc.edu.tw\/25793\/wp-json\/wp\/v2\/media?parent=18474"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/2blog.ilc.edu.tw\/25793\/wp-json\/wp\/v2\/categories?post=18474"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/2blog.ilc.edu.tw\/25793\/wp-json\/wp\/v2\/tags?post=18474"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}