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Fortinet Warns of Active Exploitation of Newly Discovered Critical Auth Bypass Bug
Fortinet on Monday revealed that the newly patched critical security vulnerability impacting its firewall and proxy products is being actively exploited in the wild. Tracked as CVE-2022-40684 (CVSS score: 9.6), the flaw relates to an authentication bypass in FortiOS, FortiProxy, and FortiSwitchManager that could allow a remote attacker to perform unauthorized operations on the administrative
Fortinet on Monday revealed that the newly patched critical security vulnerability impacting its firewall and proxy products is being actively exploited in the wild.
Tracked as CVE-2022-40684 (CVSS score: 9.6), the flaw relates to an authentication bypass in FortiOS, FortiProxy, and FortiSwitchManager that could allow a remote attacker to perform unauthorized operations on the administrative interface via specially crafted HTTP(S) requests.
“Fortinet is aware of an instance where this vulnerability was exploited, and recommends immediately validating your systems against the following indicator of compromise in the device’s logs: user=’Local_Process_Access,’” the company noted in an advisory.
The list of impacted devices is below -
- FortiOS version 7.2.0 through 7.2.1
- FortiOS version 7.0.0 through 7.0.6
- FortiProxy version 7.2.0
- FortiProxy version 7.0.0 through 7.0.6
- FortiSwitchManager version 7.2.0, and
- FortiSwitchManager version 7.0.0
Updates have been released by the security company in FortiOS versions 7.0.7 and 7.2.2, FortiProxy versions 7.0.7 and 7.2.1, and FortiSwitchManager version 7.2.1.
The disclosure comes days after Fortinet sent “confidential advance customer communications” to its customer to apply patches to mitigate potential attacks exploiting the flaw.
If updating to the latest version isn’t an option, it’s recommended users disable the HTTP/HTTPS administrative interface, or alternatively limit IP addresses that can access the administrative interface.
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This Metasploit module exploits an authentication bypass vulnerability in the Fortinet FortiOS, FortiProxy, and FortiSwitchManager API to gain access to a chosen account and then adds an SSH key to the authorized_keys file of the chosen account, allowing you to login to the system with the chosen account. Successful exploitation results in remote code execution.
An authentication bypass using an alternate path or channel [CWE-288] in Fortinet FortiOS version 7.2.0 through 7.2.1 and 7.0.0 through 7.0.6, FortiProxy version 7.2.0 and version 7.0.0 through 7.0.6 and FortiSwitchManager version 7.2.0 and 7.0.0 allows an unauthenticated atttacker to perform operations on the administrative interface via specially crafted HTTP or HTTPS requests.
The authentication bypass flaw in FortiOS, FortiProxy and FortiSwitchManager is easy to find and exploit, security experts say.
A proof-of-concept (PoC) exploit code has been made available for the recently disclosed critical security flaw affecting Fortinet FortiOS, FortiProxy, and FortiSwitchManager, making it imperative that users move quickly to apply the patches. "FortiOS exposes a management web portal that allows a user to configure the system," Horizon3.ai researcher James Horseman said. "Additionally, a user can
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