CVE-2021-1309 Cisco Small Business RV Series Routers Link Layer Discovery Protocol Vulnerabilities
An adjacent attacker can execute arbitrary code or cause a denial of service on Cisco Small Business RV Series Routers via LLDP vulnerabilities.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-1309?
CVE-2021-1309 is a high-severity memory corruption vulnerability in Cisco Small Business RV Series Router Firmware, published on 8 Apr 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Multiple vulnerabilities exist in the Link Layer Discovery Protocol (LLDP) implementation for Cisco Small Business RV Series Routers. An unauthenticated, adjacent attacker could execute arbitrary code or cause an affected router to leak system memory or reload. A memory leak or device reload would cause a denial of service (DoS) condition on an affected device. For more information about these vulnerabilities, see the Details section of this advisory. Note: LLDP is a Layer 2 protocol. To exploit these vulnerabilities, an attacker must be in the same broadcast domain as the affected device (Layer 2 adjacent).
Which versions are affected by CVE-2021-1309?
It affects 11 products.
Products include Cisco Rv132w Firmware, Cisco Rv134w Firmware, Cisco Rv160 Firmware, Cisco Rv160w Firmware, Cisco Rv260 Firmware, Cisco Rv260p Firmware and 5 more.
How do I fix CVE-2021-1309?
No fix has been published for CVE-2021-1309 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2021-1309 being exploited?
There is no known exploitation of CVE-2021-1309 in the wild and no public exploit code.
Other vulnerabilities in Cisco Small Business RV Series Router Firmware
- CVE-2018-0125 Cisco VPN Routers Remote Code Execution
- CVE-2018-0127 Missing authorization in Cisco RV132W and RV134W Wireless VPN Routers
- CVE-2021-1251 Cisco Small Business RV Series Routers Link Layer Discovery Protocol Vulnerabilities
- CVE-2021-1308 Cisco Small Business RV Series Routers Link Layer Discovery Protocol Vulnerabilities
- CVE-2021-1287 Command injection in Cisco Small Business RV Series Router Firmware
Sources
Also known as GHSA-mqj7-w9r3-q3p2.