{"id":96940,"date":"2022-07-11T01:00:59","date_gmt":"2022-07-10T23:00:59","guid":{"rendered":"https:\/\/jfrog.com\/?p=96940"},"modified":"2022-09-30T19:34:51","modified_gmt":"2022-09-30T17:34:51","slug":"cve-2022-30522-denial-of-service-dos-vulnerability-in-apache-httpd-mod_sed-filter","status":"publish","type":"post","link":"https:\/\/jfrog.com\/ja\/blog\/cve-2022-30522-denial-of-service-dos-vulnerability-in-apache-httpd-mod_sed-filter\/","title":{"rendered":"CVE-2022-30522 \u30fc Apache httpd\u300cmod_sed\u300d\u30d5\u30a3\u30eb\u30bf\u30fc\u306b\u95a2\u3059\u308b\u30b5\u30fc\u30d3\u30b9\u62d2\u5426 (DoS)\u306e\u8106\u5f31\u6027"},"content":{"rendered":"<p><img decoding=\"async\" class=\"aligncenter size-full wp-image-96589\" src=\"https:\/\/media.jfrog.com\/wp-content\/uploads\/2022\/06\/28170555\/Apache-DoS-Vulnerability-CVE-2022-30522_863x300.png\" alt=\"Apache DoS Vulnerability CVE-2022-30522\" width=\"863\" height=\"300\" srcset=\"https:\/\/speedmedia2.jfrog.com\/08612fe1-9391-4cf3-ac1a-6dd49c36b276\/media.jfrog.com\/wp-content\/uploads\/2022\/06\/28170555\/Apache-DoS-Vulnerability-CVE-2022-30522_863x300.png?speedsize=w_863 863w, https:\/\/speedmedia2.jfrog.com\/08612fe1-9391-4cf3-ac1a-6dd49c36b276\/media.jfrog.com\/wp-content\/uploads\/2022\/06\/28170555\/Apache-DoS-Vulnerability-CVE-2022-30522_863x300.png?speedsize=w_300 300w, https:\/\/speedmedia2.jfrog.com\/08612fe1-9391-4cf3-ac1a-6dd49c36b276\/media.jfrog.com\/wp-content\/uploads\/2022\/06\/28170555\/Apache-DoS-Vulnerability-CVE-2022-30522_863x300.png?speedsize=w_768 768w\" sizes=\"(max-width: 863px) 100vw, 863px\" \/><\/p>\n<p>Apache HTTP Server\u5185\u306e<a style=\"font-family: monospace\" href=\"https:\/\/httpd.apache.org\/docs\/trunk\/mod\/mod_sed.html\" target=\"_blank\" rel=\"noopener\">mod_sed<\/a>\u30d5\u30a3\u30eb\u30bf\u30fc\u30e2\u30b8\u30e5\u30fc\u30eb\u306e\u8106\u5f31\u6027\uff08<a href=\"https:\/\/nvd.nist.gov\/vuln\/detail\/CVE-2022-23943\" target=\"_blank\" rel=\"noopener\">CVE-2022-23943<\/a>\uff09\u306b\u3064\u3044\u3066\u3001\u30d0\u30c3\u30d5\u30a1\u306e\u30b5\u30a4\u30ba\u8a08\u7b97\u3092\u8aa4\u308b\u3053\u3068\u3067\u30b5\u30fc\u30d3\u30b9\u62d2\u5426\uff08\u4ee5\u4e0b\u3001DoS\uff09\u304c\u5f15\u304d\u8d77\u3053\u3055\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3068\u3044\u3046\u5206\u6790\u3092\u4eca\u5e74\uff13\u6708\u306b<a href=\"https:\/\/jfrog.com\/ja\/blog\/diving-into-cve-2022-23943-a-new-apache-memory-corruption-vulnerability\/\">\u767a\u8868<\/a>\u3057\u307e\u3057\u305f\u3002<\/p>\n<p>\u3053\u306eApache httpd\u306e\u8106\u5f31\u6027\u3068\u305d\u306e\u30d1\u30c3\u30c1\u3092\u5206\u6790\u3057\u305f\u3068\u3053\u308d\u3001<strong>\u4fee\u6b63\u306b\u3088\u3063\u3066\u554f\u984c\u306f\u89e3\u6c7a\u3055\u308c\u305f\u3082\u306e\u306e\u3001\u65b0\u305f\u306a\u554f\u984c\u3092\u5f15\u304d\u8d77\u3053\u3059\u6319\u52d5\u304c\u767a\u751f\u3057\u3066\u3044\u308b\u306e\u3067\u306f\u306a\u3044\u304b\u3068\u3044\u3046\u7591\u3044\u304c\u6d6e\u4e0a\u3057\u307e\u3057\u305f<\/strong>\u3002\u305d\u306e\u7591\u3044\u306f\u7684\u4e2d\u3057\u3001DoS\u3092\u5f15\u304d\u8d77\u3053\u3059\u5225\u306e\u8981\u56e0\u304c\u3042\u308b\u3053\u3068\u304c\u5224\u660e\u3057\u307e\u3057\u305f\u3002\u00a0<a href=\"https:\/\/httpd.apache.org\/security\/vulnerabilities_24.html\" target=\"_blank\" rel=\"noopener\">Apache<\/a>\u306f\u3053\u306e\u8106\u5f31\u6027\u306e\u6df1\u523b\u5ea6\u3092\u300c\u4f4e\u300d\u3068\u8a55\u4fa1\u3057\u307e\u3057\u305f\u304c\u3001<a href=\"https:\/\/nvd.nist.gov\/vuln\/detail\/CVE-2022-30522\" target=\"_blank\" rel=\"noopener\">NVD<\/a><span style=\"font-weight: 400\">\u306eCVSS\u30b9\u30b3\u30a2\u3067\u306f7.5\uff08\u9ad8\uff09\u3068\u306a\u308a\u307e\u3057\u305f\u3002\u3053\u306e CVE \u306e\u6df1\u523b\u5ea6\u306b\u5bfe\u3059\u308b\u79c1\u305f\u3061\u306e\u8a55\u4fa1\u306f\u300c\u4e2d\u300d\u3067\u3059\u3002DoS \u306e\u5f71\u97ff\u304c\u5927\u304d\u3044\u4e00\u65b9\u3067\u3001<\/span><code>mod_sed<\/code>\u306e\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u30d9\u30fc\u30b9\u306f\u7a00\u3067\u3042\u308b\u305f\u3081\u3067\u3059\u3002<\/p>\n<p>Apache\u306e<code>mod_sed<\/code>\u30d5\u30a3\u30eb\u30bf\u30fc\u30e2\u30b8\u30e5\u30fc\u30eb\u306f\u3001 \u30b5\u30fc\u30d0\u304c\u53d7\u3051\u53d6\u3063\u305f\u30ea\u30af\u30a8\u30b9\u30c8\u3084\u305d\u306e\u5fdc\u7b54\u306e\u5165\u51fa\u529b\u30b9\u30c8\u30ea\u30fc\u30e0\u3092\u64cd\u4f5c\u3059\u308b\u6a5f\u80fd\u3092\u63d0\u4f9b\u3057\u3001\u57fa\u672c\u7684\u306b\u306f <a href=\"https:\/\/www.gnu.org\/software\/sed\/\" target=\"_blank\" rel=\"noopener\">GNU \u306e\u30b9\u30c8\u30ea\u30fc\u30e0\u30a8\u30c7\u30a3\u30bf\u30c4\u30fc\u30eb\u3067\u3042\u308b sed<\/a>\u3068\u540c\u3058\u6a5f\u80fd\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u5165\u529b\u30d5\u30a3\u30eb\u30bf\u30fc\u3068\u3057\u3066 HTTP POST\u30ea\u30af\u30a8\u30b9\u30c8\u306e\u30dc\u30c7\u30a3\u306b\u6d3b\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u3001 \u51fa\u529b\u30d5\u30a3\u30eb\u30bf\u30fc\u3068\u3057\u3066\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306b\u9001\u3089\u308c\u308b\u524d\u306b\u30b5\u30fc\u30d0\u30fc\u306e\u5fdc\u7b54\u306e\u4fee\u6b63\u304c\u53ef\u80fd\u3067\u3059\u3002<\/p>\n<p>\u3053\u306e\u30d6\u30ed\u30b0\u8a18\u4e8b\u3067\u306f\u3001Apache HTTP Server CVE-2022-30522 \u306e\u8106\u5f31\u6027\u306e\u6982\u8981\u3068\u4fee\u6b63\u65b9\u6cd5\u306b\u95a2\u3059\u308b\u30ac\u30a4\u30c0\u30f3\u30b9\u3001\u304a\u3088\u3073\u3053\u306e\u8106\u5f31\u6027\u306b\u95a2\u3059\u308b\u8abf\u67fb\u306e\u4e00\u74b0\u3068\u3057\u3066\u767a\u898b\u3057\u305f\u7de9\u548c\u7b56\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n<h2>Apache httpd\u306e\u8106\u5f31\u6027 CVE-2022-30522\u3068\u306f\uff1f<\/h2>\n<p>CVE-2022-30522\u306f\u3001Apache HTTP Server\u306e <code>mod_sed<\/code>\u30e2\u30b8\u30e5\u30fc\u30eb\u306b\u5b58\u5728\u3059\u308bDoS\u306e\u8106\u5f31\u6027\u3067\u3059\u3002\u3053\u306e\u8106\u5f31\u6027\u306f\u3001Apache httpd 2.4.53 \u306e\u307f\u3067\uff08CVE-2022-23943 \u306e\u4e0d\u5b8c\u5168\u306a\u30d1\u30c3\u30c1\u306b\u8d77\u56e0\u3059\u308b\u305f\u3081\uff09\u3001\u30ea\u30af\u30a8\u30b9\u30c8\u307e\u305f\u306f\u30ec\u30b9\u30dd\u30f3\u30b9\u306e\u7de8\u96c6\u306b<code>mod_sed<\/code>\u306e\u30d5\u30a3\u30eb\u30bf\u30fc\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u5834\u5408\u306b\u5f71\u97ff\u3092\u53ca\u307c\u3057\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e Apache httpd\u306e\u8106\u5f31\u6027\u306f\u3001\u30b9\u30c8\u30ea\u30fc\u30e0\u30d0\u30c3\u30d5\u30a1\u306e\u51e6\u7406\u4e2d\u306b\u30e1\u30e2\u30ea\u5272\u308a\u5f53\u3066\u3092\u6700\u9069\u5316\u3057\u3088\u3046\u3068\u3059\u308b\u3053\u3068\u306b\u8d77\u56e0\u3057\u3066\u3044\u307e\u3059\u3002\u30d0\u30c3\u30d5\u30a1\u304c\u4e00\u5b9a\u306e\u30b5\u30a4\u30ba\u306b\u9054\u3059\u308b\u3068\u3001\u30e1\u30e2\u30ea\u5272\u308a\u5f53\u3066\u95a2\u6570\u3092\u591a\u6570\u56de\u547c\u3073\u51fa\u3059\u3053\u3068\u3092\u907f\u3051\u308b\u305f\u3081\u306b\u3001\u30d0\u30c3\u30d5\u30a1\u306f\u500d\u5897\u3055\u308c\u3066\u3044\u304d\u307e\u3059\u3002\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u9001\u4fe1\u3059\u308b\u5834\u5408\u306b\u306f\u3001Apache\u306e\u30e1\u30e2\u30ea\u5236\u9650\u3092\u8d85\u3048\u308b\u305f\u3081\u3001\u30d7\u30ed\u30bb\u30b9\u304c\u7570\u5e38\u7d42\u4e86\u3057\u3001\u4e8b\u5b9f\u4e0aDoS\u3092\u5f15\u304d\u8d77\u3053\u3057\u307e\u3059\u3002<\/p>\n<h2>CVE-2022-30522\u306e\u6280\u8853\u6982\u8981<\/h2>\n<p>Apache httpd <code>mod_sed<\/code>\u30d5\u30a3\u30eb\u30bf\u30fc\u30e2\u30b8\u30e5\u30fc\u30eb\u306f\u3001\u30aa\u30ea\u30b8\u30ca\u30eb\u306eGNU\u30b9\u30c8\u30ea\u30fc\u30e0\u30a8\u30c7\u30a3\u30bf\u306e\u3088\u3046\u306b\u3001 \u5165\u529b\u3068\u51fa\u529b\u306e\u30b9\u30c8\u30ea\u30fc\u30e0\u3092\u4fee\u6b63\u3059\u308b\u305f\u3081\u306e<a href=\"https:\/\/www.gnu.org\/software\/sed\/manual\/sed.html\"><span style=\"font-weight: 400\">\u6b63\u898f\u8868\u73fe\u30d1\u30bf\u30fc\u30f3\u3092\u4f7f\u7528<\/span><\/a>\u3059\u308b\u3053\u3068\u3092\u53ef\u80fd\u306b\u3057\u307e\u3059\u3002\u3053\u306e\u30e2\u30b8\u30e5\u30fc\u30eb\u3092\u4f7f\u7528\u3059\u308b\u306b\u306f\u3001Apache httpd\u306e\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u3092\u4fee\u6b63\u3057\u3066\u3001\u5fc5\u8981\u306a\u30d5\u30a3\u30eb\u30bf\u3092\u76ee\u7684\u306e\u30eb\u30fc\u30c8\u3084\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306b\u8ffd\u52a0\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u4ee5\u4e0b\u306e\u4f8b\u306f\u3001\u30ea\u30af\u30a8\u30b9\u30c8\u306e\u30dc\u30c7\u30a3\u306e\u5404\u6587\u5b57\u3092Z\u3068\u3044\u3046\u6587\u5b57\u306b\u7f6e\u304d\u63db\u3048\u308b\u30d1\u30bf\u30fc\u30f3\u3092\u4f7f\u3063\u3066\u3001html\u30d5\u30a1\u30a4\u30eb\u3078\u306e\u3059\u3079\u3066\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u30e1\u30bd\u30c3\u30c9\u3092\u7de8\u96c6\u3059\u308b\u305f\u3081\u306b<code>mod_sed<\/code>\u304c\u3069\u306e\u3088\u3046\u306b\u4f7f\u7528\u3055\u308c\u308b\u304b\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p><img decoding=\"async\" class=\"size-full wp-image-96594 alignnone\" src=\"https:\/\/media.jfrog.com\/wp-content\/uploads\/2022\/06\/28172247\/1_Example.png\" alt=\"Example\" width=\"564\" height=\"100\" srcset=\"https:\/\/speedmedia2.jfrog.com\/08612fe1-9391-4cf3-ac1a-6dd49c36b276\/media.jfrog.com\/wp-content\/uploads\/2022\/06\/28172247\/1_Example.png?speedsize=w_564 564w, https:\/\/speedmedia2.jfrog.com\/08612fe1-9391-4cf3-ac1a-6dd49c36b276\/media.jfrog.com\/wp-content\/uploads\/2022\/06\/28172247\/1_Example.png?speedsize=w_300 300w\" sizes=\"(max-width: 564px) 100vw, 564px\" \/><\/p>\n<p><code>mod_sed<\/code>\u304c\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3055\u308c\u3001\u5165\u529b\u30d5\u30a3\u30eb\u30bf\u30fc\u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\u3068\u304d\u306b2GB\uff082,147,483,648 byte\uff09\u4ee5\u4e0a\u306e\u30c7\u30fc\u30bf\u3092\u6295\u7a3f\u3055\u308c\u308b\u3068\u3001\u30cf\u30f3\u30c9\u30e9\u30fc\u306e\u30d7\u30ed\u30bb\u30b9\u304c <code>OUT_OF_MEMORY<\/code>\u306e\u305f\u3081\u306b<code>util.c<\/code>\u3067<code><a href=\"https:\/\/github.com\/apache\/httpd\/blob\/2.4.53\/server\/util.c#L3128\" target=\"_blank\" rel=\"noopener\">ap_abort_on_oom()<\/a><\/code>\u3092\u547c\u3073\u51fa\u3059\u3068\u3044\u3046\u7d50\u679c\u306b\u306a\u308a\u307e\u3057\u305f\u3002\u3053\u308c\u306f<code><a href=\"https:\/\/github.com\/apache\/apr\/blob\/trunk\/memory\/unix\/apr_pools.c#L300\" target=\"_blank\" rel=\"noopener\">allocator_alloc<\/a><\/code>\u306e\u5931\u6557\u306b\u3088\u308a\u767a\u751f\u3057\u3001\u8981\u6c42\u3055\u308c\u305f\u30a2\u30ed\u30b1\u30fc\u30b7\u30e7\u30f3\u30b5\u30a4\u30ba\u304c<code>APR_UINT32_MAX<\/code>\u3088\u308a\u5927\u304d\u3044\u305f\u3081\u3001NULL\u304c\u8fd4\u3055\u308c\u307e\u3059\u3002\u305d\u306e\u5f8c\u3001<code>abort_on_oom<\/code>\u304c\u547c\u3073\u51fa\u3055\u308c\u307e\u3059\u3002\u30b5\u30fc\u30d0\u30fc\u306b2GB\uff08\u307e\u305f\u306f\u305d\u308c\u4ee5\u4e0a\uff09\u306e\u30c7\u30fc\u30bf\u3092\u8981\u6c42\u3057\u305f\u5834\u5408\u306b\u3082\u3001\u4ee5\u4e0b\u306b\u793a\u3059\u3088\u3046\u306b\u540c\u3058\u4e8b\u8c61\u306e\u9023\u9396\u304c\u767a\u751f\u3057\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u7d50\u679c\u3001DoS\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3059\u3002\u3053\u306e\u30bf\u30a4\u30d7\u306e POST\u30ea\u30af\u30a8\u30b9\u30c8\u306e\u5f8c\u3001\u51e6\u7406\u30d7\u30ed\u30bb\u30b9\u306f\u4e2d\u6b62\u3055\u308c\u307e\u3059\u3002\u5358\u4e00\u306e\u30d7\u30ed\u30bb\u30b9\u306f\u30a6\u30a9\u30c3\u30c1\u30c9\u30c3\u30b0\u306b\u3088\u3063\u3066\u518d\u8d77\u52d5\u3055\u308c\u307e\u3059\u304c\u3001\u8907\u6570\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u9001\u308b\u3068\u3059\u3079\u3066\u306e\u30cf\u30f3\u30c9\u30e9\u30d7\u30ed\u30bb\u30b9\u304c\u30af\u30e9\u30c3\u30b7\u30e5\u3057\u3066\u3057\u307e\u3044\u3001\u305d\u306e\u7d50\u679c\u5b8c\u5168\u306aDoS\u3068\u306a\u308a\u3001\u30b5\u30fc\u30d0\u306f\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u51e6\u7406\u3067\u304d\u306a\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u3053\u308c\u306f<code>grow_buffer<\/code>\u304c\u518d\u5272\u308a\u5f53\u3066\u306e\u56de\u6570\u3092\u907f\u3051\u308b\u305f\u3081\u306b\u30d0\u30c3\u30d5\u30a1\u306e\u30b5\u30a4\u30ba\u3092\u500d\u5897\u3055\u305b\u3001 \u305d\u306e\u5f8c<code>apr_pcalloc<\/code>\u304c\u8981\u6c42\u3055\u308c\u305f\u30d0\u30c3\u30d5\u30a1\u30b5\u30a4\u30ba 4GB\u3067\u547c\u3070\u308c\u305f\u305f\u3081\u306b\u8d77\u3053\u308a\u307e\u3057\u305f\u3002<\/p>\n<pre class=\"language-c\"><code>    \/* Avoid number of times realloc is called. It could cause huge memory\r\n     * requirement if line size is huge e.g 2 MB *\/\r\n    if (newsize &lt; *cursize * 2) {\r\n        newsize = *cursize * 2;\r\n    }\r\n \r\n    \/* Align it to 4 KB boundary *\/\r\n    newsize = (newsize  + ((1 &lt;&lt; 12) - 1)) &amp; ~((1 &lt;&lt; 12) - 1);\r\n    newbuffer = apr_pcalloc(pool, newsize);<\/code><\/pre>\n<p>(<a href=\"https:\/\/github.com\/apache\/httpd\/blob\/2.4.53\/modules\/filters\/sed1.c#L103\" target=\"_blank\" rel=\"noopener\">sed1.c:103<\/a>)<\/p>\n<p>\uff12\u3064\u306e\u30af\u30e9\u30c3\u30b7\u30e5\u30d5\u30ed\u30fc\uff1a<\/p>\n<ol>\n<li style=\"list-style-type: none\">\n<ol>\n<li style=\"text-align: left\">2GB\u306e\u30c7\u30fc\u30bf\u3092\u6295\u7a3f\u3059\u308b\u5834\u5408\u3001\u5143\u306e\u30d0\u30c3\u30d5\u30a1\u306e\u30b3\u30d4\u30fc\u306f\u6210\u529f\u3057\u3001\u305d\u306e\u672b\u5c3e\u306bNULL\u30bf\u30fc\u30df\u30cd\u30fc\u30bf\u3092\u8ffd\u52a0\u3059\u308b\u3053\u3068\u304c\u8981\u6c42\u3055\u308c\u307e\u3059\u3002\u3053\u306e\u5834\u5408\u3001\u30d0\u30c3\u30d5\u30a1\u306e\u30b5\u30a4\u30ba\u304c4GB\u306e<code>allocator_alloc<\/code>\u306e\u547c\u3073\u51fa\u3057\u306f\u3001\u30d0\u30c3\u30d5\u30a1\u306e\u30b5\u30a4\u30ba\u30921\u5897\u3084\u3057\u3066NULL\u306e\u305f\u3081\u306e\u30b9\u30da\u30fc\u30b9\u3092\u78ba\u4fdd\u3057\u3088\u3046\u3068\u3057\u305f\u7d50\u679c\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u308c\u306f\u3001<code>sed_finalize_eval<\/code>\u3067\u8d77\u3053\u308a\u307e\u3059\u3002<img decoding=\"async\" class=\"size-full wp-image-96595 alignnone\" src=\"https:\/\/media.jfrog.com\/wp-content\/uploads\/2022\/06\/28172332\/2_Example.png\" alt=\"Example\" width=\"626\" height=\"331\" srcset=\"https:\/\/speedmedia2.jfrog.com\/08612fe1-9391-4cf3-ac1a-6dd49c36b276\/media.jfrog.com\/wp-content\/uploads\/2022\/06\/28172332\/2_Example.png?speedsize=w_626 626w, https:\/\/speedmedia2.jfrog.com\/08612fe1-9391-4cf3-ac1a-6dd49c36b276\/media.jfrog.com\/wp-content\/uploads\/2022\/06\/28172332\/2_Example.png?speedsize=w_300 300w\" sizes=\"(max-width: 626px) 100vw, 626px\" \/><\/li>\n<li>2GB\u4ee5\u4e0a\u306e\u30c7\u30fc\u30bf\u3001\u3064\u307e\u308a2GB+1byte\u3092\u6295\u7a3f\u3059\u308b\u969b\u3001\u5bfe\u8c61\u306e\u4fdd\u6301\u30d0\u30c3\u30d5\u30a1\u3092\u518d\u5272\u308a\u5f53\u3066\u3057\u3088\u3046\u3068\u3059\u308b\u3068\u3001\u5143\u306e\u30d0\u30c3\u30d5\u30a1\u3092\u4e38\u3054\u3068\u30b3\u30d4\u30fc\u3067\u304d\u308b\u524d\u306b\u540c\u3058\u3053\u3068\u304c\u8d77\u3053\u308a\u307e\u3059\u3002\u3053\u306e\u73fe\u8c61\u306f<code>sed_eval_buffer<\/code>\u3067\u767a\u751f\u3057\u307e\u3059\u3002<img decoding=\"async\" class=\"size-full wp-image-96596 alignnone\" src=\"https:\/\/media.jfrog.com\/wp-content\/uploads\/2022\/06\/28172356\/3_Example.png\" alt=\"Example\" width=\"626\" height=\"296\" srcset=\"https:\/\/speedmedia2.jfrog.com\/08612fe1-9391-4cf3-ac1a-6dd49c36b276\/media.jfrog.com\/wp-content\/uploads\/2022\/06\/28172356\/3_Example.png?speedsize=w_626 626w, https:\/\/speedmedia2.jfrog.com\/08612fe1-9391-4cf3-ac1a-6dd49c36b276\/media.jfrog.com\/wp-content\/uploads\/2022\/06\/28172356\/3_Example.png?speedsize=w_300 300w\" sizes=\"(max-width: 626px) 100vw, 626px\" \/><\/li>\n<\/ol>\n<\/li>\n<\/ol>\n<p><strong>\u3053\u306e\u554f\u984c\u306f\u51fa\u529b\u30d5\u30a3\u30eb\u30bf\u30fc\u306b\u3082\u95a2\u9023\u3057\u3066\u306e\u3067\u3054\u6ce8\u610f\u304f\u3060\u3055\u3044\u3002<\/strong>\u307e\u305f\u3001\u4ee5\u4e0b\u306e\u69cb\u6210\u3067\u306f\u30b5\u30fc\u30d0\u30fc\u304b\u30892GB\u3092\u8d85\u3048\u308b\u30d5\u30a1\u30a4\u30eb\u3092\u8981\u6c42\u3057\u305f\u5834\u5408\u3001\u540c\u3058\u7d50\u679c\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p><img decoding=\"async\" class=\"size-full wp-image-96597 alignnone\" src=\"https:\/\/media.jfrog.com\/wp-content\/uploads\/2022\/06\/28172422\/4_Example.png\" alt=\"Example\" width=\"624\" height=\"132\" srcset=\"https:\/\/speedmedia2.jfrog.com\/08612fe1-9391-4cf3-ac1a-6dd49c36b276\/media.jfrog.com\/wp-content\/uploads\/2022\/06\/28172422\/4_Example.png?speedsize=w_624 624w, https:\/\/speedmedia2.jfrog.com\/08612fe1-9391-4cf3-ac1a-6dd49c36b276\/media.jfrog.com\/wp-content\/uploads\/2022\/06\/28172422\/4_Example.png?speedsize=w_300 300w\" sizes=\"(max-width: 624px) 100vw, 624px\" \/><\/p>\n<p>\u30af\u30e9\u30c3\u30b7\u30e5\u306e\u6d41\u308c\u306f\u3001<code>sed_response_filter<\/code>\u306e\u4ee3\u308f\u308a\u306b<code>sed_request_filter<\/code>\u306e\u30a8\u30f3\u30c8\u30ea\u30dd\u30a4\u30f3\u30c8\u304b\u3089\u767a\u751f\u3059\u308b\u3053\u3068\u3092\u9664\u3051\u3070\u540c\u69d8\u306b\u306a\u308a\u307e\u3059\u3002<br \/>\n<img decoding=\"async\" class=\"size-full wp-image-96598 alignnone\" src=\"https:\/\/media.jfrog.com\/wp-content\/uploads\/2022\/06\/28172458\/5_Example.png\" alt=\"Example\" width=\"626\" height=\"315\" srcset=\"https:\/\/speedmedia2.jfrog.com\/08612fe1-9391-4cf3-ac1a-6dd49c36b276\/media.jfrog.com\/wp-content\/uploads\/2022\/06\/28172458\/5_Example.png?speedsize=w_626 626w, https:\/\/speedmedia2.jfrog.com\/08612fe1-9391-4cf3-ac1a-6dd49c36b276\/media.jfrog.com\/wp-content\/uploads\/2022\/06\/28172458\/5_Example.png?speedsize=w_300 300w\" sizes=\"(max-width: 626px) 100vw, 626px\" \/><\/p>\n<h2>CVE-2022-30522\u306e\u5f71\u97ff\u3092\u53d7\u3051\u308b\u95a2\u4fc2\u8005\u3068\u306f\uff1f<\/h2>\n<p>CVE-2022-30522\u306f\u3001Apache HTTP Server\u306e\u30d0\u30fc\u30b8\u30e7\u30f32.4.53\u3067\u3001<code>mod_sed<\/code>\u30d5\u30a3\u30eb\u30bf\u30fc\u30e2\u30b8\u30e5\u30fc\u30eb\u304c\u30ea\u30af\u30a8\u30b9\u30c8\u307e\u305f\u306f\u30ec\u30b9\u30dd\u30f3\u30b9\u306e\u7de8\u96c6\u306b\u4f7f\u7528\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u306b\u5f71\u97ff\u3057\u307e\u3059\u3002\u3053\u306e\u554f\u984c\u306f\u3001\u30d0\u30fc\u30b8\u30e7\u30f3 2.4.54\u3067\u4fee\u6b63\u3055\u308c\u307e\u3057\u305f\u3002<br \/>\n\u3053\u306e\u5834\u5408\u3001\u653b\u6483\u8005\u306fsed\u30d5\u30a3\u30eb\u30bf\u30fc\u3092\u4f7f\u7528\u3059\u308b\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u306b\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u9001\u4fe1\u3059\u308b\u3060\u3051\u3067\u3001\u30ea\u30e2\u30fc\u30c8\u304b\u3089\u8106\u5f31\u6027\u3092\u8a98\u767a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u306e\u3067\u3001\u6700\u3082\u6df1\u523b\u306a\u5f71\u97ff\u306f <code>mod_sed<\/code> \u304c\u30ea\u30af\u30a8\u30b9\u30c8\u306e\u7de8\u96c6\u306b\u4f7f\u7528\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u3067\u3059\u3002<br \/>\n\u4ee5\u4e0b\u306f\u3001\u4e0a\u8a18\u306b\u793a\u3057\u305f\u8106\u5f31\u6027\u306e\u3042\u308b\u8a2d\u5b9a\u306e\u4f8b\u3067\u3059\u3002<\/p>\n<p><img decoding=\"async\" class=\"size-full wp-image-96594 alignnone\" src=\"https:\/\/media.jfrog.com\/wp-content\/uploads\/2022\/06\/28172247\/1_Example.png\" alt=\"Example\" width=\"564\" height=\"100\" srcset=\"https:\/\/speedmedia2.jfrog.com\/08612fe1-9391-4cf3-ac1a-6dd49c36b276\/media.jfrog.com\/wp-content\/uploads\/2022\/06\/28172247\/1_Example.png?speedsize=w_564 564w, https:\/\/speedmedia2.jfrog.com\/08612fe1-9391-4cf3-ac1a-6dd49c36b276\/media.jfrog.com\/wp-content\/uploads\/2022\/06\/28172247\/1_Example.png?speedsize=w_300 300w\" sizes=\"(max-width: 564px) 100vw, 564px\" \/><br \/>\n(<code>InputSed<\/code>\u3067\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308b\u5b9f\u969b\u306esed\u30d1\u30bf\u30fc\u30f3\u306f\u91cd\u8981\u3067\u306f\u306a\u304f\u3001\u7a7a\u3067\u306a\u3044\u3053\u3068\u304c\u5fc5\u8981\u3067\u3059)<\/p>\n<h2>CVE-2022-30522\u306e\u5f71\u97ff\u3068\u306f\uff1f<\/h2>\n<p>\u3053\u306e\u8106\u5f31\u6027\u3092\u60aa\u7528\u3059\u308b\u306b\u306f\u3001\u30ea\u30af\u30a8\u30b9\u30c8\u306e\u30dc\u30c7\u30a3\u306b\u5927\u91cf\u306e\u30c7\u30fc\u30bf\uff082GB\u4ee5\u4e0a\uff09\u3092\u9001\u4fe1\u3057\u3001<code>mod_sed<\/code>\u304c\u305d\u306e\u30c7\u30fc\u30bf\u3092\u51e6\u7406\u3059\u308b\u3088\u3046\u306b\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u5fc5\u8981\u3067\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001HTTP\u30b5\u30fc\u30d0\u30fc\u306e1\u3064\u306e\u30d7\u30ed\u30bb\u30b9\u304cDoS\u3068\u306a\u308a\u3001\u77ed\u6642\u9593\u306e\u30c0\u30a6\u30f3\u30bf\u30a4\u30e0\u304c\u767a\u751f\u3057\u307e\u3059\u3002\u30b5\u30fc\u30d0\u30fc\u3078\u306e\u8907\u6570\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u9577\u6642\u9593\u304b\u3051\u3066\u884c\u3046\u653b\u6483\u306f\u3001\u30b5\u30fc\u30d0\u30fc\u306e\u5168\u30d7\u30ed\u30bb\u30b9\u304c\u7e70\u308a\u8fd4\u3057\u505c\u6b62\u3057\u3001\u3042\u3089\u3086\u308b\u30a6\u30a7\u30d6\u30da\u30fc\u30b8\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u306a\u304f\u306a\u308b\u305f\u3081\u3001\u5b8c\u5168\u306aDoS\u3092\u5f15\u304d\u8d77\u3053\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h2>CVE-2022-30522\u306e\u4fee\u6b63\u65b9\u6cd5\u3068\u306f\uff1f<\/h2>\n<p>\u3053\u306e\u8106\u5f31\u6027\u3092\u4fee\u6b63\u3059\u308b\u305f\u3081\u306b\u306f\u3001Apache httpd\u3092\u6700\u65b0\u7248\uff08\u73fe\u57282.4.54\uff09\u306b\u30a2\u30c3\u30d7\u30b0\u30ec\u30fc\u30c9\u3059\u308b\u3053\u3068\u304c\u63a8\u5968\u3055\u308c\u307e\u3059\u3002\u30a2\u30c3\u30d7\u30b0\u30ec\u30fc\u30c9\u304c\u4e0d\u53ef\u80fd\u306a\u5834\u5408\u306f\u3001<code>mod_sed<\/code>\u30d5\u30a3\u30eb\u30bf\u30fc\u30e2\u30b8\u30e5\u30fc\u30eb\u306e\u672c\u8106\u5f31\u6027\u3092\u4fee\u6b63\u3059\u308b<a href=\"https:\/\/github.com\/apache\/httpd\/commit\/65b8fb947b144556c7ad1cf7ddc3941010ad77ba\">\u30d1\u30c3\u30c1<\/a>\u3092\u9069\u7528\u3059\u308b\u3053\u3068\u3092\u5f37\u304f\u63a8\u5968\u3057\u307e\u3059\u3002<\/p>\n<h2>CVE-2022-30522 \u306b\u5bfe\u3059\u308b\u7de9\u548c\u7b56\u3068\u306f\uff1f<\/h2>\n<p>Apache HTTP Server\u3092\u6700\u65b0\u7248\u306b\u30a2\u30c3\u30d7\u30b0\u30ec\u30fc\u30c9\u3057\u305f\u308a\u3001\u30d1\u30c3\u30c1\u3092\u9069\u7528\u3057\u305f\u308a\u3067\u304d\u306a\u3044\u5834\u5408\u306f\u3001POST\u30e1\u30bd\u30c3\u30c9\u306e\u30dc\u30c7\u30a3\u30b5\u30a4\u30ba\u3092\u5236\u9650\u3057\u3066\u3001\u672c\u8106\u5f31\u6027\u3092\u8a98\u767a\u3055\u305b\u306a\u3044\u3088\u3046\u306b\u3059\u308b\u3053\u3068\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u306b\u306f\u3001Apache httpd\u306e\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u3067 <code><a href=\"https:\/\/httpd.apache.org\/docs\/2.0\/mod\/core.html#limitrequestbody\" target=\"_blank\" rel=\"noopener\">LimitRequestBody<\/a><\/code>\u30c7\u30a3\u30ec\u30af\u30c6\u30a3\u30d6\u3092\u4f7f\u7528\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u30c7\u30a3\u30ec\u30af\u30c6\u30a3\u30d6\u306f\u30010\u304b\u3089\u59cb\u307e\u308a\u3001\u6700\u59272GB\u307e\u3067\u306e\u30c7\u30fc\u30bf\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u30b5\u30a4\u30ba\u306b\u5236\u9650\u3092\u8a2d\u5b9a\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u3053\u306e\u3088\u3046\u306b\u30011GB\u3092\u8d85\u3048\u308b\u30c7\u30fc\u30bf\u306ePOST\u30ea\u30af\u30a8\u30b9\u30c8\u30dc\u30c7\u30a3\u3092\u9632\u3050\u305f\u3081\u306b\u3001\u6b21\u306e\u3088\u3046\u306a\u5236\u9650\u3092\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u304c\u63a8\u5968\u3055\u308c\u307e\u3059\u3002<\/p>\n<p><code>LimitRequestBody 1073741824<\/code><\/p>\n<p><strong>\u3054\u6ce8\u610f\uff1a<\/strong>\u3053\u306e\u7de9\u548c\u7b56\u306f\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304b\u3089\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u306b\u3088\u3063\u3066\u5f15\u304d\u8d77\u3053\u3055\u308c\u308bDoS\u304b\u3089\u306e\u4fdd\u8b77\u306e\u307f\u3092\u63d0\u4f9b\u3057\u3001<code>mod_sed<\/code>\u304c\u30ec\u30b9\u30dd\u30f3\u30b9\u3092\u4fee\u6b63\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u30012GB\u4ee5\u4e0a\u306e\u30ec\u30b9\u30dd\u30f3\u30b9\u304c\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306b\u9001\u4fe1\u3055\u308c\u305f\u5834\u5408\u3001\u30b5\u30fc\u30d0\u30fc\u304cDoS\u306b\u5bfe\u3057\u3066\u8106\u5f31\u306a\u307e\u307e\u3067\u3042\u308b\u3053\u3068\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h2>JFrog\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30fb\u30ea\u30b5\u30fc\u30c1\u306e\u6700\u65b0\u60c5\u5831<\/h2>\n<p>JFrog\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30fb\u30ea\u30b5\u30fc\u30c1\u30c1\u30fc\u30e0\u304b\u3089\u306e\u6700\u65b0\u306e\u60c5\u5831\u306f\u3001<a href=\"https:\/\/jfrog.com\/ja\/?s=%E3%82%BB%E3%82%AD%E3%83%A5%E3%83%AA%E3%83%86%E3%82%A3%E3%83%AA%E3%82%B5%E3%83%BC%E3%83%81%E3%83%81%E3%83%BC%E3%83%A0\">\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30fb\u30ea\u30b5\u30fc\u30c1\u306e\u30d6\u30ed\u30b0\u8a18\u4e8b<\/a>\u3084Twitter <a href=\"https:\/\/twitter.com\/JFrogSecurity\">@JFrogSecurity<\/a>\u304b\u3089\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/p>\n<h2>JFrog Xray\u3067\u8106\u5f31\u6027\u306e\u3042\u308b\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u63a2\u3059<\/h2>\n<p><a href=\"https:\/\/jfrog.com\/ja\/xray\/\">JFrog Xray<\/a> SCA\u30c4\u30fc\u30eb\u306f\u3001\u30ea\u30b5\u30fc\u30c1\u30c1\u30fc\u30e0\u3092\u901a\u3058\u3066\u65b0\u3057\u3044\u8106\u5f31\u6027\u3084\u8105\u5a01\u3092\u660e\u3089\u304b\u306b\u3059\u308b\u3060\u3051\u3067\u306a\u304f\u3001\u81ea\u52d5\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30b9\u30ad\u30e3\u30f3\u306b\u3088\u308a\u3001\u958b\u767a\u8005\u3084\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30c1\u30fc\u30e0\u304c\u81ea\u793e\u306e\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u306b\u95a2\u9023\u3059\u308b\u6700\u65b0\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30a4\u30f3\u30b5\u30a4\u30c8\u3078\u306e\u7c21\u5358\u306a\u30a2\u30af\u30bb\u30b9\u3092\u53ef\u80fd\u306b\u3057\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Apache HTTP Server\u5185\u306emod_sed\u30d5\u30a3\u30eb\u30bf\u30fc\u30e2\u30b8\u30e5\u30fc\u30eb\u306e\u8106\u5f31\u6027\uff08CVE-2022-2394 &hellip;<\/p>\n","protected":false},"author":333,"featured_media":96590,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[9833,9395],"tags":[9951,9415],"class_list":["post-96940","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-security-and-devsecops-ja","category-xray-ja-2","tag-9951","tag-9415"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.6 (Yoast SEO v22.6) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>CVE-2022-30522\uff1aApache httpd \u300cmod_sed\u300d\u30d5\u30a3\u30eb\u30bf\u30fcDos\u306e\u8106\u5f31\u6027 | JFrog Japan<\/title>\n<meta name=\"description\" content=\"\u3053\u306e\u30d6\u30ed\u30b0\u8a18\u4e8b\u3067\u306f\u3001Apache HTTP Server CVE-2022-30522 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