CVE-2021-42840: Malicious File Upload
First published: Fri Oct 22 2021(Updated: )
SuiteCRM before 7.11.19 allows remote code execution via the system settings Log File Name setting. In certain circumstances involving admin account takeover, logger_file_name can refer to an attacker-controlled PHP file under the web root, because only the all-lowercase PHP file extensions were blocked. NOTE: this issue exists because of an incomplete fix for CVE-2020-28328.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| SalesAgility SuiteCRM | <7.11.19 | |
| <7.11.19 |
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Reference Links
- http://packetstormsecurity.com/files/165001/SuiteCRM-7.11.18-Remote-Code-Execution.html
- https://docs.suitecrm.com/admin/releases/7.11.x/#_7_11_19
- https://github.com/rapid7/metasploit-framework/commits/master/modules/exploits/linux/http/suitecrm_log_file_rce.rb
- https://suitecrm.com/time-to-upgrade-suitecrm-7-11-19-7-10-30-lts-released/
- https://theyhack.me/SuiteCRM-RCE-2/
Frequently Asked Questions
What is CVE-2021-42840?
CVE-2021-42840 is a vulnerability in SuiteCRM before version 7.11.19 that allows remote code execution through a system settings Log File Name setting.
How severe is CVE-2021-42840?
CVE-2021-42840 has a severity rating of 8.8 (Critical).
Which software versions are affected by CVE-2021-42840?
SuiteCRM versions up to and exclusive of 7.11.19 are affected by CVE-2021-42840.
How can an attacker exploit CVE-2021-42840?
An attacker can exploit CVE-2021-42840 by taking over an admin account and then using the logger_file_name setting to reference an attacker-controlled PHP file under the web root.
Are there any references available for CVE-2021-42840?
Yes, you can find references for CVE-2021-42840 at the following links: [Packet Storm](http://packetstormsecurity.com/files/165001/SuiteCRM-7.11.18-Remote-Code-Execution.html), [SuiteCRM Documentation](https://docs.suitecrm.com/admin/releases/7.11.x/#_7_11_19), [Metasploit Framework](https://github.com/rapid7/metasploit-framework/commits/master/modules/exploits/linux/http/suitecrm_log_file_rce.rb).
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