PT-2021-1949 · Cisco · Cisco Small Business Rv042G+5

Published 2021-02-03 · Updated 2021-02-05 · CVE-2021-1335

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 of the affected routers. This could allow an authenticated, remote attacker to execute arbitrary code or cause an affected device to restart unexpectedly. The attacker could exploit this by sending crafted HTTP requests to an affected device, potentially allowing them 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 this, an attacker would need to have valid administrator credentials on the affected device.

Recommendations 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:2021-00753

CVE-2021-1335

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 · 5

• https://osv.dev/vulnerability/CVE-2021-1335 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-1335 · Security Note
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-rv-overflow-ghZP68yj · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-00753 · Security Note
• https://t.me/cvenotify/9432 · Telegram Post