PT-2021-1942 · Cisco · Cisco Small Business Rv042G+5

Published 2021-02-03 · Updated 2021-02-05 · CVE-2021-1342

Positive Technologies (AI Summary)

CVSS v2.0

9.0

High

Base vector

AV:N/AC:L/Au:S/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions Cisco Small Business RV016, RV042, RV042G, RV082, RV320, and RV325 Routers (affected versions not specified)

Description The issue is related to improper validation of user-supplied input in the web-based management interface, allowing an authenticated, remote attacker to execute arbitrary code or cause an affected device to restart unexpectedly. An attacker could exploit this by sending crafted HTTP requests to an affected device, potentially executing arbitrary code as the root user on the underlying operating system or causing the device to reload, resulting in a denial of service (DoS) condition. The attacker would need valid administrator credentials on the affected device to exploit this issue.

Recommendations For Cisco Small Business RV016, RV042, RV042G, RV082, RV320, and RV325 Routers, consider disabling the web-based management interface until a patch is available. Restrict access to the web-based management interface to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Stack Overflow

Weakness Enumeration

CWE-121

Related Identifiers

BDU:2021-00746

CVE-2021-1342

Affected Products

Cisco Small Business Rv016

Cisco Small Business Rv042

Cisco Small Business Rv042G

Cisco Small Business Rv082

Cisco Small Business Rv320

Cisco Small Business Rv325

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2021-1342 · Security Note
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-rv-overflow-ghZP68yj · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-1342 · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-00746 · Security Note