Vulnerability identifier: #VU14431

Vulnerability risk: Low

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-0409

CWE-ID: CWE-126

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Cisco Unified Communications Manager IM & Presence Service
Client/Desktop applications / Other client software

Vendor: Cisco Systems, Inc

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The vulnerability exists in the XCP Router service due to improper validation of user-supplied input. A remote attacker can send a malicious IPv4 or IPv6 packet to an affected device on TCP port 7400, overread a buffer and cause the XCP Router service to crash and restart.

Mitigation
Update to version 12.5(0.98000.355), 12.0(1.21000.3), 11.5(1.14900.32) or 11.5(1.14900.15).

Vulnerable software versions

Cisco Unified Communications Manager IM & Presence Service: 11.5.1

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External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180815-ucmimps-dos

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Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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