Risk | Critical |
Patch available | NO |
Number of vulnerabilities | 1 |
CVE-ID | CVE-2021-34730 |
CWE-ID | CWE-121 |
Exploitation vector | Network |
Public exploit | Public exploit code for vulnerability #1 is available. |
Vulnerable software Subscribe |
RV110W Wireless-N VPN Firewall Hardware solutions / Routers for home users RV130W Wireless-N Multifunction VPN Router Hardware solutions / Routers for home users Cisco Small Business RV130 Series VPN Routers Hardware solutions / Routers for home users RV215W Wireless-N VPN Router Hardware solutions / Routers for home users |
Vendor | Cisco Systems, Inc |
Security Bulletin
This security bulletin contains one critical risk vulnerability.
EUVDB-ID: #VU56020
Risk: Critical
CVSSv3.1: 9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:U/RC:C]
CVE-ID: CVE-2021-34730
CWE-ID:
CWE-121 - Stack-based buffer overflow
Exploit availability: Yes
DescriptionThe vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error in the Universal Plug-and-Play (UPnP) service. A remote unauthenticated attacker can send a specially crafted UPnP request to an affected device, trigger stack-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
MitigationCybersecurity Help is currently unaware of any official solution to address this vulnerability.
Cisco is not planning to release any security updates for the affected devices, as they have reached the end-of-life status.
As a workaround it is recommended to disable UPnP.
To disable UPnP on the LAN interface of a device, do the following:
RV110W Wireless-N VPN Firewall: 1.0.0.2 - 1.3.1.7
RV130W Wireless-N Multifunction VPN Router: 1.0.0.21 - 1.3.1.7
Cisco Small Business RV130 Series VPN Routers: 1.0.0.21 - 1.3.1.7
RV215W Wireless-N VPN Router: 1.0.3.55 - 1.3.1.7
External linkshttp://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cisco-sb-rv-overflow-htpymMB5
http://bst.cloudapps.cisco.com/bugsearch/bug/CSCvz05607
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?
No. We are not aware of malware exploiting this vulnerability.