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Fortinet Patches High-Severity Authentication Bypass Vulnerability in FortiOS

Cybersecurity solutions provider Fortinet this week announced patches for multiple vulnerabilities across its products, including a high-severity authentication bypass impacting FortiOS and FortiProxy.

Cybersecurity solutions provider Fortinet this week announced patches for multiple vulnerabilities across its products, including a high-severity authentication bypass impacting FortiOS and FortiProxy.

Tracked as CVE-2022-35843 (CVSS score of 7.7), the authentication bypass was identified in the SSH login component of FortiOS. The bug can only be triggered when Radius authentication is used.

“An authentication bypass by assumed-immutable data vulnerability in the FortiOS SSH login component may allow a remote and unauthenticated attacker to login into the device via sending specially crafted Access-Challenge response from the Radius server,” Fortinet explains in an advisory.

The vulnerability, Fortinet says, impacts FortiOS versions 7.2.x, 7.0.x, 6.4.x, 6.2.x and 6.0.x, and FortiProxy versions 7.0.x, 2.0.x and 1.2.x.

Patches were included in FortiOS versions 7.2.2, 7.0.8, and 6.4.10, and in FortiProxy versions 7.0.7 and 2.0.11.

A network operating system powering Fortinet’s physical firewalls, FortiOS is often targeted by threat actors looking to compromise commercial, government, and technology services networks.

In fact, US government agencies have issued multiple alerts to warn of ongoing exploitation of known vulnerabilities in FortiOS, urging federal agencies and private organizations to apply available patches in a timely manner.

This week, Fortinet also announced patches for two medium-severity vulnerabilities in FortiADC (Application Delivery Controller), which ensures application availability, optimization, and security.

The first bug (CVE-2022-33876) cumulates multiple input validation issues leading to information disclosure via crafted HTML requests, while the second (CVE-2022-33875) is described as an improper neutralization of special elements leading to SQL injection.

Several low-severity vulnerabilities have also been resolved. Additional details on these security defects and the impacted products can be found on Fortinet’s PSIRT page.

Related: Fortinet Patches 6 High-Severity Vulnerabilities

Related: Fortinet Admits Many Devices Still Unprotected Against Exploited Vulnerability

Related: Fortinet Customers Told to Urgently Patch Remotely Exploitable Vulnerability

Written By

Ionut Arghire is an international correspondent for SecurityWeek.

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