{"id":17512,"date":"2024-11-18T09:04:09","date_gmt":"2024-11-18T01:04:09","guid":{"rendered":"https:\/\/fwq.ai\/blog\/17512\/"},"modified":"2024-11-18T09:04:09","modified_gmt":"2024-11-18T01:04:09","slug":"%e6%8e%a2%e7%a9%b6selinux%e5%b7%a5%e4%bd%9c%e5%8e%9f%e7%90%86","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/17512\/","title":{"rendered":"\u63a2\u7a76SELinux\u5de5\u4f5c\u539f\u7406"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/000\/887\/227\/170893712194517.jpg\" class=\"aligncenter\" title=\"\u63a2\u7a76SELinux\u5de5\u4f5c\u539f\u7406\u63d2\u56fe\" alt=\"\u63a2\u7a76SELinux\u5de5\u4f5c\u539f\u7406\u63d2\u56fe\" \/><\/p>\n<p>\u5728\u5f53\u4eca\u4e92\u8054\u7f51\u65f6\u4ee3\uff0c\u7f51\u7edc\u5b89\u5168\u95ee\u9898\u65e5\u76ca\u51f8\u663e\u3002\u4e3a\u4e86\u4fdd\u62a4\u7cfb\u7edf\u514d\u53d7\u6076\u610f\u653b\u51fb\u548c\u672a\u7ecf\u6388\u6743\u7684\u8bbf\u95ee\uff0c\u64cd\u4f5c\u7cfb\u7edf\u5bf9\u5b89\u5168\u673a\u5236\u6709\u4e86\u66f4\u9ad8\u7684\u8981\u6c42\u3002SELinux\uff08Security-Enhanced Linux\uff09\u4f5c\u4e3aLinux\u5185\u6838\u7684\u4e00\u4e2a\u5b89\u5168\u6a21\u5757\uff0c\u63d0\u4f9b\u4e86\u5f3a\u5927\u7684\u5b89\u5168\u7b56\u7565\u548c\u8bbf\u95ee\u63a7\u5236\u673a\u5236\uff0c\u4e3a\u7cfb\u7edf\u63d0\u4f9b\u4e86\u989d\u5916\u7684\u5b89\u5168\u4fdd\u969c\u3002<\/p>\n<p>\u4e00\u3001SELinux\u7684\u5de5\u4f5c\u6a21\u5f0f<\/p>\n<p>SELinux\u91c7\u7528\u4e86\u5f3a\u5236\u8bbf\u95ee\u63a7\u5236\uff08MAC\uff09\u673a\u5236\uff0c\u4e0e\u4f20\u7edf\u7684\u81ea\u4e3b\u8bbf\u95ee\u63a7\u5236\uff08DAC\uff09\u6709\u6240\u533a\u522b\u3002\u5728DAC\u6a21\u5f0f\u4e0b\uff0c\u8bbf\u95ee\u63a7\u5236\u53d6\u51b3\u4e8e\u8d44\u6e90\u7684\u6240\u6709\u8005\uff0c\u5373\u8d44\u6e90\u7684\u8bbf\u95ee\u6743\u9650\u7531\u8d44\u6e90\u7684\u6240\u6709\u8005\u81ea\u884c\u51b3\u5b9a\u3002\u800c\u5728SELinux\u7684MAC\u6a21\u5f0f\u4e0b\uff0c\u6240\u6709\u7684\u8d44\u6e90\u8bbf\u95ee\u90fd\u53d7\u5230\u4e25\u683c\u7684\u5f3a\u5236\u7b56\u7565\u63a7\u5236\uff0c\u5305\u62ec\u8fdb\u7a0b\u3001\u6587\u4ef6\u3001socket\u7b49\u3002\u8fd9\u610f\u5473\u7740\u5373\u4f7f\u4e00\u4e2a\u7528\u6237\u83b7\u5f97\u4e86root\u6743\u9650\uff0c\u4e5f\u65e0\u6cd5\u7ed5\u8fc7SELinux\u7684\u4fdd\u62a4\u673a\u5236\u3002<\/p>\n<p>\u5728SELinux\u4e2d\uff0c\u6bcf\u4e2a\u8fdb\u7a0b\u548c\u5bf9\u8c61\u90fd\u6709\u4e00\u4e2a\u4e0e\u4e4b\u5bf9\u5e94\u7684\u5b89\u5168\u4e0a\u4e0b\u6587\u3002\u5b89\u5168\u4e0a\u4e0b\u6587\u7531\u4e3b\u4f53\u6807\u7b7e\u548c\u5bf9\u8c61\u6807\u7b7e\u7ec4\u6210\uff0c\u4e3b\u4f53\u6807\u7b7e\u8868\u793a\u8fdb\u7a0b\u7684\u6743\u9650\uff0c\u5bf9\u8c61\u6807\u7b7e\u8868\u793a\u5bf9\u8c61\u7684\u6743\u9650\u3002\u5f53\u4e00\u4e2a\u8bf7\u6c42\u88ab\u53d1\u8d77\u65f6\uff0cSELinux\u4f1a\u6839\u636e\u4e3b\u4f53\u6807\u7b7e\u548c\u5bf9\u8c61\u6807\u7b7e\u7684\u8bbf\u95ee\u63a7\u5236\u77e9\u9635\u6765\u51b3\u5b9a\u662f\u5426\u5141\u8bb8\u8fd9\u4e2a\u8bf7\u6c42\u3002<\/p>\n<p>\u4e8c\u3001\u5177\u4f53\u4ee3\u7801\u793a\u4f8b<\/p>\n<p>\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u5c06\u901a\u8fc7\u4e00\u4e2a\u7b80\u5355\u7684\u4ee3\u7801\u793a\u4f8b\u6765\u6f14\u793aSELinux\u7684\u5de5\u4f5c\u6a21\u5f0f\u3002\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u5c06\u521b\u5efa\u4e00\u4e2a\u7b80\u5355\u7684C\u7a0b\u5e8f\uff0c\u7a0b\u5e8f\u5c1d\u8bd5\u6253\u5f00\u4e00\u4e2a\u6587\u4ef6\u5e76\u5199\u5165\u5185\u5bb9\u3002\u6211\u4eec\u5c06\u4f7f\u7528SELinux\u7684\u5b89\u5168\u89c4\u5219\u6765\u9650\u5236\u8be5\u7a0b\u5e8f\u7684\u6743\u9650\u3002<\/p>\n<p>\u9996\u5148\uff0c\u6211\u4eec\u9700\u8981\u786e\u4fdd\u7cfb\u7edf\u4e2d\u5b89\u88c5\u4e86SELinux\uff0c\u5e76\u4e14\u542f\u7528\u4e86SELinux\u3002\u7136\u540e\uff0c\u6211\u4eec\u521b\u5efa\u4e00\u4e2a\u540d\u4e3a&#8221;selinux_example.c&#8221;\u7684\u6587\u4ef6\uff0c\u7f16\u5199\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/p>\n<pre>#include &lt;stdio.h&gt;\n#include &lt;stdlib.h&gt;\n#include &lt;unistd.h&gt;\n#include &lt;fcntl.h&gt;\n\nint main() {\n    char *file_path = \"\/tmp\/example.txt\";\n    char *content = \"Hello, SELinux!\";\n\n    int fd = open(file_path, O_RDWR|O_CREAT, S_IRUSR|S_IWUSR);\n    if (fd &lt;p&gt;\u5728\u8fd9\u4e2a\u7a0b\u5e8f\u4e2d\uff0c\u6211\u4eec\u5c1d\u8bd5\u6253\u5f00\u4e00\u4e2a\u540d\u4e3a\"example.txt\"\u7684\u6587\u4ef6\u5e76\u5199\u5165\u5185\u5bb9\"Hello, SELinux!\"\u3002\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u9700\u8981\u4e3a\u8be5\u7a0b\u5e8f\u521b\u5efa\u4e00\u4e2aSELinux\u5b89\u5168\u7b56\u7565\u3002\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\"audit2allow\"\u5de5\u5177\u6765\u751f\u6210\u4e00\u4e2a\u4e34\u65f6SELinux\u7b56\u7565\uff0c\u7136\u540e\u52a0\u8f7d\u8fd9\u4e2a\u7b56\u7565\u3002\u6267\u884c\u4ee5\u4e0b\u547d\u4ee4\uff1a&lt;\/p&gt;\n&lt;pre class=\"brush:bash;toolbar:false;\"&gt;audit2allow -a -M my_selinux_example\nsemodule -i my_selinux_example.pp<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p>\u751f\u6210\u7b56\u7565\u540e\uff0c\u6211\u4eec\u53ef\u4ee5\u8fd0\u884c\u7f16\u8bd1\u540e\u7684\u7a0b\u5e8f\uff0c\u5b83\u5e94\u8be5\u80fd\u591f\u6210\u529f\u5199\u5165\u6587\u4ef6\u3002\u7136\u540e\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7SELinux\u7684\u5ba1\u8ba1\u65e5\u5fd7\u6765\u67e5\u770b\u8bbf\u95ee\u6743\u9650\u7684\u8ffd\u8e2a\u548c\u8bb0\u5f55\u3002\u6267\u884c\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n<pre>grep 'avc: ' \/var\/log\/audit\/audit.log | audit2why<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p>\u901a\u8fc7\u4ee5\u4e0a\u793a\u4f8b\u4ee3\u7801\u548c\u6b65\u9aa4\uff0c\u6211\u4eec\u53ef\u4ee5\u66f4\u6df1\u5165\u5730\u4e86\u89e3SELinux\u7684\u5de5\u4f5c\u6a21\u5f0f\u548c\u5982\u4f55\u901a\u8fc7\u5b89\u5168\u7b56\u7565\u6765\u4fdd\u62a4\u7cfb\u7edf\u3002 SELinux\u63d0\u4f9b\u4e86\u5f3a\u5927\u7684\u5b89\u5168\u673a\u5236\uff0c\u786e\u4fdd\u7cfb\u7edf\u514d\u53d7\u6076\u610f\u653b\u51fb\u548c\u6ee5\u7528\u3002\u5982\u9700\u6df1\u5165\u5b66\u4e60SELinux\uff0c\u5efa\u8bae\u67e5\u9605\u66f4\u591a\u76f8\u5173\u8d44\u6599\u548c\u6587\u6863\uff0c\u8fdb\u4e00\u6b65\u4e86\u89e3\u5b89\u5168\u7b56\u7565\u7684\u7f16\u5199\u548c\u7ba1\u7406\u65b9\u5f0f\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662f\u63a2\u7a76SELinux\u5de5\u4f5c\u539f\u7406\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728\u5f53\u4eca\u4e92\u8054\u7f51\u65f6\u4ee3\uff0c\u7f51\u7edc\u5b89\u5168\u95ee\u9898\u65e5\u76ca\u51f8\u663e\u3002\u4e3a\u4e86\u4fdd\u62a4\u7cfb\u7edf\u514d\u53d7\u6076\u610f\u653b\u51fb\u548c\u672a\u7ecf\u6388\u6743\u7684\u8bbf\u95ee\uff0c\u64cd\u4f5c\u7cfb\u7edf\u5bf9\u5b89\u5168\u673a\u5236\u6709\u4e86\u66f4\u9ad8\u7684\u8981\u6c42\u3002SELinux\uff08Security-Enhanced Linux\uff09\u4f5c\u4e3aLinux\u5185\u6838\u7684\u4e00\u4e2a\u5b89\u5168\u6a21\u5757\uff0c\u63d0\u4f9b\u4e86\u5f3a\u5927\u7684\u5b89\u5168\u7b56\u7565\u548c\u8bbf\u95ee\u63a7\u5236\u673a\u5236\uff0c\u4e3a\u7cfb\u7edf\u63d0\u4f9b\u4e86\u989d\u5916\u7684\u5b89\u5168\u4fdd\u969c\u3002 \u4e00\u3001SELinux\u7684\u5de5\u4f5c\u6a21\u5f0f SELinux\u91c7\u7528\u4e86\u5f3a\u5236\u8bbf\u95ee\u63a7\u5236\uff08MAC\uff09\u673a\u5236\uff0c\u4e0e\u4f20\u7edf\u7684\u81ea\u4e3b\u8bbf\u95ee\u63a7\u5236\uff08DAC\uff09\u6709\u6240\u533a\u522b\u3002\u5728DAC\u6a21\u5f0f\u4e0b\uff0c\u8bbf\u95ee\u63a7\u5236\u53d6\u51b3\u4e8e\u8d44\u6e90\u7684\u6240\u6709\u8005\uff0c\u5373\u8d44\u6e90\u7684\u8bbf\u95ee\u6743\u9650\u7531\u8d44\u6e90\u7684\u6240\u6709\u8005\u81ea\u884c\u51b3\u5b9a\u3002\u800c\u5728SELinux\u7684MAC\u6a21\u5f0f\u4e0b\uff0c\u6240\u6709\u7684\u8d44\u6e90\u8bbf\u95ee\u90fd\u53d7\u5230\u4e25\u683c\u7684\u5f3a\u5236\u7b56\u7565\u63a7\u5236\uff0c\u5305\u62ec\u8fdb\u7a0b\u3001\u6587\u4ef6\u3001socket\u7b49\u3002\u8fd9\u610f\u5473\u7740\u5373\u4f7f\u4e00\u4e2a\u7528\u6237\u83b7\u5f97\u4e86root\u6743\u9650\uff0c\u4e5f\u65e0\u6cd5\u7ed5\u8fc7SELinux\u7684\u4fdd\u62a4\u673a\u5236\u3002 \u5728SELinux\u4e2d\uff0c\u6bcf\u4e2a\u8fdb\u7a0b\u548c\u5bf9\u8c61\u90fd\u6709\u4e00\u4e2a\u4e0e\u4e4b\u5bf9\u5e94\u7684\u5b89\u5168\u4e0a\u4e0b\u6587\u3002\u5b89\u5168\u4e0a\u4e0b\u6587\u7531\u4e3b\u4f53\u6807\u7b7e\u548c\u5bf9\u8c61\u6807\u7b7e\u7ec4\u6210\uff0c\u4e3b\u4f53\u6807\u7b7e\u8868\u793a\u8fdb\u7a0b\u7684\u6743\u9650\uff0c\u5bf9\u8c61\u6807\u7b7e\u8868\u793a\u5bf9\u8c61\u7684\u6743\u9650\u3002\u5f53\u4e00\u4e2a\u8bf7\u6c42\u88ab\u53d1\u8d77\u65f6\uff0cSELinux\u4f1a\u6839\u636e\u4e3b\u4f53\u6807\u7b7e\u548c\u5bf9\u8c61\u6807\u7b7e\u7684\u8bbf\u95ee\u63a7\u5236\u77e9\u9635\u6765\u51b3\u5b9a\u662f\u5426\u5141\u8bb8\u8fd9\u4e2a\u8bf7\u6c42\u3002 \u4e8c\u3001\u5177\u4f53\u4ee3\u7801\u793a\u4f8b \u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u5c06\u901a\u8fc7\u4e00\u4e2a\u7b80\u5355\u7684\u4ee3\u7801\u793a\u4f8b\u6765\u6f14\u793aSELinux\u7684\u5de5\u4f5c\u6a21\u5f0f\u3002\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u5c06\u521b\u5efa\u4e00\u4e2a\u7b80\u5355\u7684C\u7a0b\u5e8f\uff0c\u7a0b\u5e8f\u5c1d\u8bd5\u6253\u5f00\u4e00\u4e2a\u6587\u4ef6\u5e76\u5199\u5165\u5185\u5bb9\u3002\u6211\u4eec\u5c06\u4f7f\u7528SELinux\u7684\u5b89\u5168\u89c4\u5219\u6765\u9650\u5236\u8be5\u7a0b\u5e8f\u7684\u6743\u9650\u3002 \u9996\u5148\uff0c\u6211\u4eec\u9700\u8981\u786e\u4fdd\u7cfb\u7edf\u4e2d\u5b89\u88c5\u4e86SELinux\uff0c\u5e76\u4e14\u542f\u7528\u4e86SELinux\u3002\u7136\u540e\uff0c\u6211\u4eec\u521b\u5efa\u4e00\u4e2a\u540d\u4e3a&#8221;selinux_example.c&#8221;\u7684\u6587\u4ef6\uff0c\u7f16\u5199\u4ee5\u4e0b\u4ee3\u7801\uff1a #include &lt;stdio.h&gt; #include &lt;stdlib.h&gt; #include &lt;unistd.h&gt; #include &lt;fcntl.h&gt; int main() { char *file_path = &#8220;\/tmp\/example.txt&#8221;; char *content = &#8220;Hello, SELinux!&#8221;; int fd = open(file_path, O_RDWR|O_CREAT, S_IRUSR|S_IWUSR); if (fd &lt;p&gt;\u5728\u8fd9\u4e2a\u7a0b\u5e8f\u4e2d\uff0c\u6211\u4eec\u5c1d\u8bd5\u6253\u5f00\u4e00\u4e2a\u540d\u4e3a&#8221;example.txt&#8221;\u7684\u6587\u4ef6\u5e76\u5199\u5165\u5185\u5bb9&#8221;Hello, SELinux!&#8221;\u3002\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u9700\u8981\u4e3a\u8be5\u7a0b\u5e8f\u521b\u5efa\u4e00\u4e2aSELinux\u5b89\u5168\u7b56\u7565\u3002\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528&#8221;audit2allow&#8221;\u5de5\u5177\u6765\u751f\u6210\u4e00\u4e2a\u4e34\u65f6SELinux\u7b56\u7565\uff0c\u7136\u540e\u52a0\u8f7d\u8fd9\u4e2a\u7b56\u7565\u3002\u6267\u884c\u4ee5\u4e0b\u547d\u4ee4\uff1a&lt;\/p&gt; &lt;pre class=&#8221;brush:bash;toolbar:false;&#8221;&gt;audit2allow -a -M my_selinux_example semodule -i my_selinux_example.pp \u767b\u5f55\u540e\u590d\u5236 \u751f\u6210\u7b56\u7565\u540e\uff0c\u6211\u4eec\u53ef\u4ee5\u8fd0\u884c\u7f16\u8bd1\u540e\u7684\u7a0b\u5e8f\uff0c\u5b83\u5e94\u8be5\u80fd\u591f\u6210\u529f\u5199\u5165\u6587\u4ef6\u3002\u7136\u540e\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7SELinux\u7684\u5ba1\u8ba1\u65e5\u5fd7\u6765\u67e5\u770b\u8bbf\u95ee\u6743\u9650\u7684\u8ffd\u8e2a\u548c\u8bb0\u5f55\u3002\u6267\u884c\u4ee5\u4e0b\u547d\u4ee4\uff1a grep &#8216;avc: &#8216; \/var\/log\/audit\/audit.log | audit2why \u767b\u5f55\u540e\u590d\u5236 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-17512","post","type-post","status-publish","format-standard","hentry","category-os"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/17512","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=17512"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/17512\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=17512"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=17512"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=17512"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}