SB2023061312 - Multiple vulnerabilities in Fortinet FortiOS

Description

This security bulletin contains information about 3 vulnerabilities.

1) NULL pointer dereference (CVE-ID: CVE-2023-29180)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error. A remote non-authenticated attacker can send a specially crafted HTTP request to the /proxy endpoint and crash the SSL-VPN daemon.

2) Format string error (CVE-ID: CVE-2023-29181)

CWE-ID: CWE-134 - Use of Externally-Controlled Format String

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote user to execute arbitrary code on the target system.

The vulnerability exists due to a format string error in the Fclicense daemon. A remote user can send specially crafted requests to the daemon that contains format string specifiers and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

3) NULL pointer dereference (CVE-ID: CVE-2023-29179)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote user to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error. A remote user can send a specially crafted HTTP request to the /proxy endpoint and crash the SSL-VPN daemon.

Remediation

Install update from vendor's website.

References

• https://fortiguard.fortinet.com/psirt/FG-IR-23-111
• https://fortiguard.fortinet.com/psirt/FG-IR-23-119
• https://fortiguard.fortinet.com/psirt/FG-IR-23-125