CVE-2022-20804 : A vulnerability in the Cisco Discovery Protocol of Cisco Unified Communications Manager (Unified CM) and Cisco Unified C

A vulnerability in the Cisco Discovery Protocol of Cisco Unified Communications Manager (Unified CM) and Cisco Unified Communications Manager Session Management Edition (Unified CM SME) could allow an unauthenticated, adjacent attacker to cause a kernel panic on an affected system, resulting in a denial of service (DoS) condition. This vulnerability is due to incorrect processing of certain Cisco Discovery Protocol packets. An attacker could exploit this vulnerability by continuously sending certain Cisco Discovery Protocol packets to an affected device. A successful exploit could allow the attacker to cause a kernel panic on the system that is running the affected software, resulting in a DoS condition.

Published 2022-04-21 19:15:09

Updated 2022-05-03 15:31:43

Source Cisco Systems, Inc.

View at NVD, CVE.org

Vulnerability category: Denial of service

Threat overview for CVE-2022-20804

Top countries where our scanners detected CVE-2022-20804

Top open port discovered on systems with this issue 5061

IPs affected by CVE-2022-20804 512

Threat actors abusing to this issue? Yes

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Exploit prediction scoring system (EPSS) score for CVE-2022-20804

Probability of exploitation activity in the next 30 days: 0.05%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 18 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2022-20804

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
6.1	MEDIUM	AV:A/AC:L/Au:N/C:N/I:N/A:C	6.5	6.9	NIST
Access Vector: Adjacent Network Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: None Availability Impact: Complete
5.3	MEDIUM	CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H	1.6	3.6	Cisco Systems, Inc.
Attack Vector: Adjacent Network Attack Complexity: High Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: None Availability: High
6.5	MEDIUM	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	2.8	3.6	NIST
Attack Vector: Adjacent Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: None Availability: High

CWE ids for CVE-2022-20804

CWE-754 Improper Check for Unusual or Exceptional Conditions

The product does not check or incorrectly checks for unusual or exceptional conditions that are not expected to occur frequently during day to day operation of the product.
Assigned by:
- nvd@nist.gov (Primary)
- ykramarz@cisco.com (Secondary)

References for CVE-2022-20804

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ucm-dos-zHS9X9kD

Cisco Unified Communications Products Denial of Service Vulnerability
Vendor Advisory

Products affected by CVE-2022-20804