#VU51992 Buffer overflow in Cisco Systems, Inc products - CVE-2021-1309

Vulnerability identifier: #VU51992

Vulnerability risk: Medium

CVSSv4.0: 6.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-1309

CWE-ID: CWE-119

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
RV132W ADSL2+ Wireless-N VPN Router
Hardware solutions / Routers & switches, VoIP, GSM, etc
RV134W VDSL2 Wireless-AC VPN Router
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco Small Business RV160 Series VPN Router
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco Small Business RV160W Wireless-AC VPN Router
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco Small Business RV260 VPN Router
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco Small Business RV260P VPN Router with POE
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco Small Business RV260W Wireless-AC VPN Router
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco RV340 Dual WAN Gigabit VPN Router
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco RV340W Dual WAN Gigabit Wireless-AC VPN Router
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco RV345 Dual WAN Gigabit VPN Router
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco RV345P Dual WAN Gigabit VPN Router
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: Cisco Systems, Inc

Description

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

The vulnerability exists due to a boundary error in the LLDP implementation. A remote attacker on the local network can trigger memory corruption and execute arbitrary code on the target system.

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

Mitigation
Install updates from vendor's website.

Vulnerable software versions

RV132W ADSL2+ Wireless-N VPN Router: 1.0.1.14

RV134W VDSL2 Wireless-AC VPN Router: before 1.0.1.21

Cisco Small Business RV160 Series VPN Router: before 1.0.01.03

Cisco Small Business RV160W Wireless-AC VPN Router: before 1.0.01.03

Cisco Small Business RV260 VPN Router: before 1.0.01.03

Cisco Small Business RV260P VPN Router with POE: before 1.0.01.03

Cisco Small Business RV260W Wireless-AC VPN Router: before 1.0.01.03

Cisco RV340 Dual WAN Gigabit VPN Router: before 1.0.03.21

Cisco RV340W Dual WAN Gigabit Wireless-AC VPN Router: before 1.0.03.21

Cisco RV345 Dual WAN Gigabit VPN Router: before 1.0.03.21

Cisco RV345P Dual WAN Gigabit VPN Router: before 1.0.03.21

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External links
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-rv-multi-lldp-u7e4chCe

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.