An out-of-bounds write vulnerability [CWE-787] and a Stack-based Buffer Overflow [CWE-121] in FortiOS & FortiProxy captive portal may allow an inside attacker who has access to captive portal to execute arbitrary code or commands via specially crafted HTTP requests.
Workaround:
Set a non form-based authentication scheme:
config authentication schemeedit schemeset method methodnextend
Where <method> can be any of those :
ntlm NTLM authentication.basic Basic HTTP authentication.digest Digest HTTP authentication.negotiate Negotiate authentication.fsso Fortinet Single Sign-On (FSSO) authentication.rsso RADIUS Single Sign-On (RSSO) authentication.ssh-publickey Public key based SSH authentication.cert Client certificate authentication.saml SAML authentication
None of the enabled authentication schemes should be form-based.
Please note that only devices with captive portal enabled are affected.
An improper privilege management vulnerability [CWE-269] in a Fortinet FortiOS HA cluster version 7.4.0 through 7.4.1 and 7.2.5 and in a FortiProxy HA cluster version 7.4.0 through 7.4.1 allows an authenticated attacker to perform elevated actions via crafted HTTP or HTTPS requests.
An insufficient session expiration vulnerability [CWE-613] in FortiOS, FortiProxy, FortiPAM & FortiSwitchManager GUI may allow attackers to re-use websessions after GUI logout, should they manage to acquire the required credentials.
An exposure of sensitive information to an unauthorized actor in Fortinet FortiOS at least version at least 7.4.0 through 7.4.1 and 7.2.0 through 7.2.5 and 7.0.0 through 7.0.15 and 6.4.0 through 6.4.15 allows attacker to information disclosure via HTTP requests.
A use of GET request method with sensitive query strings vulnerability [CWE-598] in the FortiOS SSL VPN component may allow an attacker to view plaintext passwords of remote services such as RDP or VNC, if the attacker is able to read the GET requests to those services (found in logs, referers, caches, etc...)
Multiple format string bug vulnerabilitues [CWE-134] in FortiOS, FortiProxy, FortiPAM & FortiSwitchManager command line interpreter and httpd may allow an authenticated attacker to achieve arbitrary code execution via specifically crafted commands and http requests.
An insertion of sensitive information into log file vulnerability [CWE-532] in FortiOS / FortiProxy log events may allow a remote authenticated attacker to read certain passwords in ciphertext.
A null pointer dereference [CWE-476] in FortiOS and FortiProxy SSL VPN may allow an authenticated attacker to perform a DoS attack on the device via specifically crafted HTTP requests.
A null pointer dereference [CWE-476] in FortiOS and FortiProxy SSL VPN may allow an authenticated attacker to perform a DoS attack on the device via specifically crafted HTTP requests.
An improper access control vulnerability [CWE-284] in FortiOS 7.4.0 through 7.4.3, 7.2.5 through 7.2.7, 7.0.12 through 7.0.14 and 6.4.x may allow an attacker who has already successfully obtained write access to the underlying system (via another hypothetical exploit) to bypass the file integrity checking system.
An exposure of sensitive information to an unauthorized actor vulnerability [CWE-200] in FortiOS may allow an unauthenticated attacker to fingerprint the device version via HTTP requests.
An improper access control vulnerability [CWE-284] in FortiOS may allow an attacker who has already successfully obtained write access to the underlying system (via another hypothetical exploit) to bypass the file integrity checking system.
An insufficient session expiration vulnerability [CWE-613] in FortiOS, FortiProxy, FortiPAM & FortiSwitchManager GUI may allow attackers to re-use websessions after GUI logout, should they manage to acquire the required credentials.
An insertion of sensitive information into log file vulnerability [CWE-532] in FortiOS / FortiProxy log events may allow a remote authenticated attacker to read certain passwords in ciphertext.