CVE-2021-41282

diag_routes.php in pfSense 2.5.2 allows sed data injection. Authenticated users are intended to be able to view data about the routes set in the firewall. The data is retrieved by executing the netstat utility, and then its output is parsed via the sed utility. Although the common protection mechanisms against command injection (i.e., the usage of the escapeshellarg function for the arguments) are used, it is still possible to inject sed-specific code and write an arbitrary file in an arbitrary location.

• CWE-74

• http://packetstormsecurity.com/files/166208/pfSense-2.5.2-Shell-Upload.htmlExploit, Third Party Advisory, VDB Entry
• https://docs.netgate.com/pfsense/en/latest/releases/22-01_2-6-0.htmlRelease Notes, Third Party Advisory
• https://www.shielder.it/advisories/Third Party Advisory
• https://www.shielder.it/advisories/pfsense-remote-command-execution/Exploit, Third Party Advisory
• http://packetstormsecurity.com/files/166208/pfSense-2.5.2-Shell-Upload.htmlExploit, Third Party Advisory, VDB Entry
• https://docs.netgate.com/pfsense/en/latest/releases/22-01_2-6-0.htmlRelease Notes, Third Party Advisory
• https://www.shielder.it/advisories/Third Party Advisory
• https://www.shielder.it/advisories/pfsense-remote-command-execution/Exploit, Third Party Advisory

Published

Mar 1, 2022

Last Modified

Jun 17, 2026

Status

Modified

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