Recently, NSFOCUS CERT has monitored that the exploit details of the Thinkphp remote code execution vulnerability are publicly disclosed on the Internet. Due to the incoming parameter inspection defect in the Thinkphp program, when Thinkphp enables the multilingual function, unauthenticated attackers can pass in parameters through get, header, cookie, etc., to achieve directory traversal and file inclusion, and finally achieve remote code execution by the pearcmd file with trick. The details of the vulnerability have been made public. Relevant users are requested to take protective measures as soon as possible.
ThinkPHP is a free open source, fast and simple object-oriented lightweight PHP development framework. NSFOCUS CERT has successfully reproduced this vulnerability:
Reference link: https://blog.thinkphp.cn/3078655
Scope of Impact
- v6.0.0 <= ThinkPHP <= v6.0.13
- v5.1.0 <= ThinkPHP <= v5.1.41
- v5.0.0 <= ThinkPHP <= v5.0.24
- ThinkPHP >= v6.0.14
- ThinkPHP = v5.1.42
1. Execute the following command to view the version information of ThinkPHP:
php think version
If it is within the affected range, the product may be affected by this vulnerability.
2. Check whether ThinkPHP has multilingual function enabled.
Check whether there are comments in the following content in app/middleware.php. If there are no comments, ThinkPHP has enabled multi-language function, and the product is affected by this vulnerability.
Check app/middleware.php, if the following content exists, ThinkPHP has enabled multilingual function, and the product is affected by this vulnerability.
If the upgrade is not possible, the user can do the protection in the following ways.
Check app/middleware.php and comment the following content:
Check app/middleware.php, change ‘lang_switch_on’ => true to the following:
3. Restart Thinkphp
This advisory is only used to describe a potential risk. NSFOCUS does not provide any commitment or promise on this advisory. NSFOCUS and the author will not bear any liability for any direct and/or indirect consequences and losses caused by transmitting and/or using this advisory. NSFOCUS reserves all the rights to modify and interpret this advisory. Please include this statement paragraph when reproducing or transferring this advisory. Do not modify this advisory, add/delete any information to/from it, or use this advisory for commercial purposes without permission from NSFOCUS.
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