CVE-2021-34730 Memory corruption in Cisco Small Business RV Series Router Firmware
Unauthenticated remote attackers can execute arbitrary code as root or cause denial of service on Cisco Small Business routers via crafted UPnP requests.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-34730?
CVE-2021-34730 is a critical memory corruption vulnerability in Cisco Application Extension Platform, published on 18 Aug 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability in the Universal Plug-and-Play (UPnP) service of Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers could allow an unauthenticated, remote attacker to execute arbitrary code or cause an affected device to restart unexpectedly, resulting in a denial of service (DoS) condition. This vulnerability is due to improper validation of incoming UPnP traffic. An attacker could exploit this vulnerability by sending a crafted UPnP request to an affected device. A successful exploit could allow the attacker to execute arbitrary code as the root user on the underlying operating system or cause the device to reload, resulting in a DoS condition. Cisco has not released software updates that address this vulnerability.
Which versions are affected by CVE-2021-34730?
It affects 5 products.
Products include Cisco Application Extension Platform, Cisco Rv110w Wireless-N Vpn Firewall Firmware, Cisco Rv130 Vpn Router Firmware, Cisco Rv130w Wireless-N Multifunction Vpn Router Firmware, Cisco Rv215w Wireless-N Vpn Router Firmware.
How do I fix CVE-2021-34730?
No fix has been published for CVE-2021-34730 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-2021-34730 being exploited?
There is no known exploitation of CVE-2021-34730 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in Cisco Application Extension Platform
- CVE-2021-1146 Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Command Injection Vulnerabilities
- CVE-2021-1147 Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Command Injection Vulnerabilities
- CVE-2021-1148 Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Command Injection Vulnerabilities
- CVE-2021-1149 Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Command Injection Vulnerabilities
- CVE-2021-1150 Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Command Injection Vulnerabilities
Sources
Also known as GHSA-9c26-qcv5-q5qj.