PT-2021-1947 · Cisco · Cisco Small Business Rv042G+5

Published 2021-02-03 · Updated 2021-02-05 · CVE-2021-1337

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 (affected versions not specified)

Description The issue is related to insufficient validation of user-supplied input in the web-based management interface, which could allow a remote attacker to execute arbitrary code or cause the device to restart unexpectedly. The attacker would need to have valid administrator credentials on the affected device to exploit this issue. The exploitation could be done by sending crafted HTTP requests to the affected device, potentially leading to the execution of arbitrary code as the root user on the underlying operating system or causing the device to reload, resulting in a denial of service condition.

Recommendations For Cisco Small Business RV016, RV042, RV042G, RV082, RV320, and RV325, consider restricting access to the web-based management interface until a fix is available. As a temporary workaround, limit the use of 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.

Memory Corruption

Stack Overflow

Weakness Enumeration

CWE-787

CWE-121

Related Identifiers

BDU:2021-00751

CVE-2021-1337

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-2021-1337 · Security Note
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-rv-overflow-ghZP68yj · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-1337 · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-00751 · Security Note