Denial of service in Cisco Unified Communications Manager and Unified Communications Manager Session Management Edition

1) Improper access control

EUVDB-ID: #VU52933

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-1478

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions in the Java Management Extensions (JMX) component. A remote attacker can access the port and restart the JMX process, leading to denial of service (DoS) condition.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Unified Communications Manager (CallManager): before 12.6

Cisco Unified Communications Manager Session Management Edition: before 12.6

CPE2.3

• cpe:2.3:a:cisco_systems:unified_communications_manager_callmanager:*:*:*:*:*:*:*:*
• cpe:2.3:a:cisco_systems:cisco_unified_communications_manager_session_management_edition:*:*:*:*:*:*:*:*

External links

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ucm-dos-OO4SRYEf

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.