Advisory Details

February 22nd, 2022

(Pwn2Own) Cisco RV340 upload.cgi sessionid Improper Input Validation Authentication Bypass Vulnerability

CVE ID	CVE-2022-20705
CVSS SCORE	8.8, AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AFFECTED VENDORS	Cisco
AFFECTED PRODUCTS	RV340
VULNERABILITY DETAILS	This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of Cisco RV340 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of the sessionid parameter provided to the upload.cgi endpoint. The issue results from the lack of proper validation of the user-supplied sessionid cookie. An attacker can leverage this vulnerability to bypass authentication on the system.
ADDITIONAL DETAILS	Cisco has issued an update to correct this vulnerability. More details can be found at: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-smb-mult-vuln-KA9PK6D
DISCLOSURE TIMELINE	2021-12-03 - Vulnerability reported to vendor 2022-02-22 - Coordinated public release of advisory
CREDIT	Bien Pham (@bienpnn) from Team Orca of Sea Security (security.sea.com)

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