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我已经为我的一台服务器启用了 mod 安全性，但是如果我提交带有 unicode 字符的表单，它会在日志中显示以下错误并且不允许访问网页。

[Wed May 192.168.0.1 2013] [error] [client 192.168.0.1] ModSecurity: Access denied with code 403 (phase 2). 
Pattern match "(?i:(?:,.*?[)\\\\da-f\\"'`\\xc2\\xb4\\xe2\\x80\\x99\\xe2\\x80\\x98][\\"'`\\xc2\\xb4\\xe2\\x80\\x99\\xe2\\x80\\x98](?:[\\"'`\\xc2\\xb4\\xe2\\x80\\x99\\xe2\\x80\\x98].*?[\\"'`\\xc2\\xb4\\xe2\\x80\\x99\\xe2\\x80\\x98]|\\\\Z|[^\\"'`\\xc2\\xb4\\xe2\\x80\\x99\\xe2\\x80\\x98]+))|(?:\\\\Wselect.+\\\\W*?from)|((? ..." at ARGS:shortDescription. [file "/etc/httpd/modsecurity-crs/base_rules/modsecurity_crs_41_sql_injection_attacks.conf"] [line "209"] [id "981257"] [msg "Detects MySQL comment-/space-obfuscated injections and backtick termination"] [data "Matched Data: , \\xe0\\xb6\\xa1\\xe0\\xb6\\xb1\\xe0\\xb7\\x8a\\xe0\\xb6\\xaf \\xe0\\xb6\\xb6\\xe0\\xb6\\xbd\\xe0\\xb6\\xba\\xe0\\xb7\\x99\\xe0\\xb6\\xb1\\xe0\\xb7\\x8a \\xe0\\xb6\\x91\\xe0\\xb6\\xba \\xe0\\xb6\\xb4\\xe0\\xb7\\x99\\xe0\\xb6\\xbb\\xe0\\xb7\\x85\\xe0\\xb7\\x93\\xe0\\xb6\\xb8\\xe0\\xb6\\xa7 \\xe0\\xb6\\x9a\\xe0\\xb6\\xa7\\xe0\\xb6\\xba\\xe0\\xb7\\x94\\xe0\\xb6\\xad\\xe0\\xb7\\x94 \\xe0\\xb6\\x9a\\xe0\\xb6\\xbb\\xe0\\xb6\\xb1 \\xe0\\xb6\\xb6\\xe0\\xb7\\x80\\xe0\\xb6\\xad\\xe0\\xb7\\x8a \\xe0\\xb7\\x80\\xe0\\xb7\\x92\\xe0\\xb6\\xb4\\xe0\\xb6\\x9a\\xe0\\xb7\\x8a\\xe0\\xb [hostname "doomain.test.invalid"] [uri "/admin/add_news_article.php"] [unique_id "UZycDtHvchoAAENNXfYAAABR"]
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2 回答 2

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如果此站点是生产服务器：首先在 detection_only 模式下运行 Mod_Security并检查日志是否有误报。

在 CRS 中查找 ID：

localhost:/etc/modsecurity>grep 981257 *.conf
modsecurity_crs_41_sql_injection_attacks.conf:SecRule REQUEST_COOKIES|!REQUEST_COOKIES:/__utm/|REQUEST_COOKIES_NAMES|ARGS_NAMES|ARGS|XML:/* "(?i:(?:,.*?[)\da-f\"'`´’‘][\"'`´’‘](?:[\"'`´’‘].*?[\"'`´’‘]|\Z|[^\"'`´’‘]+))|(?:\Wselect.+\W*?from)|((?:select|create|rename|truncate|load|alter|delete|update|insert|desc)\s*?\(\s*?space\s*?\())" "phase:2,capture,t:none,t:urlDecodeUni,block,msg:'Detects MySQL comment-/space-obfuscated injections and backtick termination',id:'981257',tag:'OWASP_CRS/WEB_ATTACK/SQL_INJECTION',logdata:'Matched Data: %{TX.0} found within %{MATCHED_VAR_NAME}: %{MATCHED_VAR}',severity:'2',setvar:'tx.msg=%{rule.id}-%{rule.msg}',setvar:tx.sql_injection_score=+1,setvar:tx.anomaly_score=+%{tx.critical_anomaly_score},setvar:'tx.%{tx.msg}-OWASP_CRS/WEB_ATTACK/SQLI-%{matched_var_name}=%{tx.0}'"

看起来你的论点中有特殊字符shortDescription。

于 2013-06-18T13:08:21.830 回答
1

Another hint: If you have a rule which provokes a lot of "false positives", you easily can disable it (even specifically for a given path) using the SecRuleRemoveById keyword. Example for the error in your question:

<Directory /var/www/admin>
  SecRuleRemoveById 981257
</Directory>

Assumed /var/www is the DOCUMENT_ROOT used. This way you can use the complete provided ruleset, but disable single rules where they should not be applied.

于 2013-10-16T22:48:51.813 回答