Description
An issue was discovered in FusionAuth before 1.11.0. An authenticated user, allowed to edit e-mail templates (Home -> Settings -> Email Templates) or themes (Home -> Settings -> Themes), can execute commands on the underlying operating system by abusing freemarker.template.utility.Execute in the Apache FreeMarker engine that processes custom templates.
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 2 repositories
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ianxtianxt/CVE-2020-7799 ★ 3 · Feb 19, 2020
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Pikaqi/cve-2020-7799 ★ 1 · Feb 10, 2020
批量检测cve-2020-7799
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- https://fusionauth.io/docs/v1/tech/release-notes
- 20200127 CVE - CVE-2020-7799 - FusionAuth command execution via Apache Freemarker Template mailing-list
- http://packetstormsecurity.com/files/156102/FusionAuth-1.10-Remote-Command-Execution.html
- https://lab.mediaservice.net/advisory/2020-03-fusionauth.txt