critical
9
CWE
121
Advisory Published
Updated

CVE-2021-1343: Cisco Small Business RV Series Routers Management Interface Remote Command Execution and Denial of Service Vulnerabilities

First published: Thu Feb 04 2021(Updated: )

Multiple vulnerabilities in the web-based management interface of Cisco Small Business RV016, RV042, RV042G, RV082, RV320, and RV325 Routers could allow an authenticated, remote attacker to execute arbitrary code or cause an affected device to restart unexpectedly. These vulnerabilities are due to improper validation of user-supplied input in the web-based management interface. An attacker could exploit these vulnerabilities by sending crafted HTTP requests 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 denial of service (DoS) condition. To exploit these vulnerabilities, an attacker would need to have valid administrator credentials on the affected device.

Credit: ykramarz@cisco.com

Affected SoftwareAffected VersionHow to fix
Cisco Rv016 Multi-wan Vpn Router Firmware<=4.2.3.14
Cisco Rv016 Multi-wan Vpn Router
Cisco Rv042 Dual Wan Vpn Router Firmware<=4.2.3.14
Cisco Rv042 Dual Wan Vpn Router
Cisco Rv042g Dual Gigabit Wan Vpn Router Firmware<=4.2.3.14
Cisco Rv042g Dual Gigabit Wan Vpn Router
Cisco Rv082 Dual Wan Vpn Router Firmware<=4.2.3.14
Cisco Rv082 Dual Wan Vpn Router
Cisco Rv320 Dual Gigabit Wan Vpn Router Firmware<=1.5.1.11
Cisco Rv320 Dual Gigabit Wan Vpn Router
Cisco Rv325 Dual Gigabit Wan Vpn Router Firmware<=1.5.1.11
Cisco Rv325 Dual Gigabit Wan Vpn Router

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Reference Links

Frequently Asked Questions

  • What is CVE-2021-1343?

    CVE-2021-1343 is a vulnerability in the web-based management interface of Cisco Small Business RV016, RV042, RV042G, RV082, RV320, and RV325 Routers that could allow an authenticated, remote attacker to execute arbitrary code or cause an affected device to restart unexpectedly.

  • How severe is CVE-2021-1343?

    CVE-2021-1343 has a severity value of 7.2, which is considered critical.

  • Which software versions are affected by CVE-2021-1343?

    The affected software versions are Cisco Rv016 Multi-wan Vpn Router Firmware up to and including 4.2.3.14, Cisco Rv042 Dual Wan Vpn Router Firmware up to and including 4.2.3.14, Cisco Rv042g Dual Gigabit Wan Vpn Router Firmware up to and including 4.2.3.14, Cisco Rv082 Dual Wan Vpn Router Firmware up to and including 4.2.3.14, Cisco Rv320 Dual Gigabit Wan Vpn Router Firmware up to and including 1.5.1.11, and Cisco Rv325 Dual Gigabit Wan Vpn Router Firmware up to and including 1.5.1.11.

  • How can an attacker exploit CVE-2021-1343?

    An authenticated, remote attacker can exploit CVE-2021-1343 to execute arbitrary code or cause an affected device to restart unexpectedly by leveraging vulnerabilities in the web-based management interface of the affected Cisco Small Business Routers.

  • Where can I find more information about CVE-2021-1343?

    You can find more information about CVE-2021-1343 on the Cisco Security Advisory website: [https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-rv-overflow-ghZP68yj](https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-rv-overflow-ghZP68yj).

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