[FortiWeb] Buffer overflow vulnerability in the cookie header

Summary

A stack-based buffer overflow vulnerability in FortiWeb may allow a remote, authenticated attacker to crash the httpd daemon thread by sending a request with a crafted cookie header.

Affected Products

FortiWeb versions 6.3.7 and below.
FortiWeb versions 6.2.3 and below.

Solutions

Please upgrade to FortiWeb versions 6.3.8 or above.
Please upgrade to FortiWeb versions 6.2.4 or above.

Acknowledgement

Fortinet is pleased to thank Andrey Medov from ptsecurity for reporting this vulnerability under responsible disclosure.

Timeline

2021-01-04: Initial publication