FortiWeb is vulnerable to a buffer overflow


A stack-based buffer overflow vulnerability in FortiWeb may allow a remote, unauthenticated 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.


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


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