critical
9
CWE
121
Advisory Published
Updated

CVE-2021-1342: 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-2021-1342?

    CVE-2021-1342 is a vulnerability that allows an authenticated, remote attacker to execute arbitrary code or cause an affected device to restart unexpectedly in Cisco Small Business RV016, RV042, RV042G, RV082, RV320, and RV325 Routers.

  • How severe is CVE-2021-1342?

    CVE-2021-1342 has a severity rating of 7.2 (Critical).

  • Which software versions are affected by CVE-2021-1342?

    CVE-2021-1342 affects Cisco Small Business RV016 firmware up to and including version 4.2.3.14, Cisco Small Business RV042 firmware up to and including version 4.2.3.14, Cisco Small Business RV042G firmware up to and including version 4.2.3.14, Cisco Small Business RV082 firmware up to and including version 4.2.3.14, Cisco Small Business RV320 firmware up to and including version 1.5.1.11, and Cisco Small Business RV325 firmware up to and including version 1.5.1.11.

  • How can an attacker exploit CVE-2021-1342?

    An attacker can exploit CVE-2021-1342 by exploiting vulnerabilities in the web-based management interface of the affected Cisco Small Business routers to execute arbitrary code or cause the device to restart unexpectedly.

  • How can I fix CVE-2021-1342?

    To fix CVE-2021-1342, it is recommended to apply the latest firmware updates provided by Cisco for the affected Cisco Small Business routers.

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