PT-2021-5483 · Cisco · Cisco Cbr-8 Converged Broadband Routers+1

Published 2021-09-22 · Updated 2022-07-08 · CVE-2021-1623

Positive Technologies (AI Summary)

CVSS v3.1

7.7

High

Base vector

AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Cisco cBR-8 Converged Broadband Routers (affected versions not specified)

Description A vulnerability in the Simple Network Management Protocol (SNMP) punt handling function could allow an authenticated, remote attacker to overload a device punt path, resulting in a denial of service (DoS) condition. This is due to the punt path being overwhelmed by large quantities of SNMP requests. An attacker could exploit this vulnerability by sending a large number of SNMP requests to an affected device. A successful exploit could allow the attacker to overload the device punt path, resulting in a DoS condition.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

Weakness Enumeration

CWE-399

Related Identifiers

BDU:2021-06332

CVE-2021-1623

Affected Products

Cisco Ios Xe

Cisco Cbr-8 Converged Broadband Routers

References · 9

• https://nvd.nist.gov/vuln/detail/CVE-2021-1623 · Security Note
• https://safe-surf.ru/specialists/bulletins-nkcki/669678 · Security Note
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cbr8snmp-zGjkZ9Fc · Vendor Advisory
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cbr8snmp-zGjkZ9Fc · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-06332 · Security Note
• https://osv.dev/vulnerability/CVE-2021-1623 · Vendor Advisory
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cbr8snmp-zGjkZ9Fc?vsfCisco20Security20AdvisoryvscatSecurity20IntelligencevstypeRSSvspCisco20IOS20XE20Software20for20Cisco20cBR-820Converged20Broadband20Routers20Simple20Network20Management20Protocol20Denial20of20Service20Vulnerabilityvsk1#fs · Note
• https://t.me/cibsecurity/29272 · Telegram Post
• https://t.me/cvenotify/21330 · Telegram Post