Remote code execution in Cisco Small Business RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN Routers

1) Buffer overflow

EUVDB-ID: #VU60246

Risk: Critical

CVSSv3.1: 9.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2022-20699

CWE-ID: CWE-119 - Memory corruption

Exploit availability: Yes

Description

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

The vulnerability exists due to a boundary error when processing HTTP requests. A remote attacker can send a specially crafted HTTP request to the device that is acting as SSL VPN Gateway,  trigger memory corruption and execute arbitrary code on the target system with root privileges.

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

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco RV340 Dual WAN Gigabit VPN Router: 1.0.0.33 - 1.0.03.24

Cisco RV340W Dual WAN Gigabit Wireless-AC VPN Router: 1.0.01.16 - 1.0.03.24

Cisco RV345 Dual WAN Gigabit VPN Router: 1.0.0.33 - 1.0.03.24

Cisco RV345P Dual WAN Gigabit VPN Router: 1.0.0.33 - 1.0.03.24

CPE2.3

• cpe:2.3:h:cisco_systems:cisco_rv340_dual_wan_gigabit_vpn_router:1.0.0.33:*:*:*:*:*:*:
• cpe:2.3:h:cisco_systems:cisco_rv340_dual_wan_gigabit_vpn_router:1.0.1.16:*:*:*:*:*:*:
• cpe:2.3:h:cisco_systems:cisco_rv340_dual_wan_gigabit_vpn_router:1.0.3.17:*:*:*:*:*:*:
• cpe:2.3:h:cisco_systems:cisco_rv340w_dual_wan_gigabit_wireless-ac_vpn_router:1.0.01.16:*:*:*:*:*:*:
• cpe:2.3:h:cisco_systems:cisco_rv340w_dual_wan_gigabit_wireless-ac_vpn_router:1.0.01.17:*:*:*:*:*:*:
• cpe:2.3:h:cisco_systems:cisco_rv340w_dual_wan_gigabit_wireless-ac_vpn_router:1.0.01.18:*:*:*:*:*:*:
• cpe:2.3:h:cisco_systems:cisco_rv345_dual_wan_gigabit_vpn_router:1.0.0.33:*:*:*:*:*:*:
• cpe:2.3:h:cisco_systems:cisco_rv345_dual_wan_gigabit_vpn_router:1.0.1.16:*:*:*:*:*:*:
• cpe:2.3:h:cisco_systems:cisco_rv345_dual_wan_gigabit_vpn_router:1.0.3.17:*:*:*:*:*:*:
• cpe:2.3:h:cisco_systems:cisco_rv345p_dual_wan_gigabit_vpn_router:1.0.0.33:*:*:*:*:*:*:

External links

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-smb-mult-vuln-KA9PK6D

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.