PT-2021-5040 · Cisco · Cisco Meeting Server

Published 2021-10-21 · Updated 2021-11-03 · CVE-2021-40122

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Cisco Meeting Server (affected versions not specified)

Description The issue is related to improper handling of large series of message requests in the Call Bridge feature's API, which could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. An attacker could exploit this by sending a series of messages to the vulnerable API, potentially causing the affected device to reload, dropping all ongoing calls.

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

Improper Resource Release

Weakness Enumeration

CWE-404

CWE-399

Related Identifiers

BDU:2021-05810

CVE-2021-40122

Affected Products

Cisco Meeting Server

References · 6

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cms-LAHe8z5v · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-40122 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-40122 · Security Note
• https://bdu.fstec.ru/vul/2021-05810 · Security Note
• https://t.me/cvenotify/22377 · Telegram Post
• https://t.me/cibsecurity/30935 · Telegram Post