A vulnerability in the Session Initiation Protocol (SIP) UDP throttling process of Cisco Unified Communications Manager (Cisco Unified CM) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to insufficient rate limiting protection. An attacker could exploit this vulnerability by sending the affected device a high rate of SIP messages. An exploit could allow the attacker to cause the device to reload unexpectedly. The device and services will restart automatically. This vulnerability affects Cisco Unified Communications Manager (CallManager) releases prior to the first fixed release; the following list indicates the first minor release that includes the fix for this vulnerability: 10.5.2.14900-16 11.0.1.23900-5 11.5.1.12900-2. Cisco Bug IDs: CSCuz72455.
This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 7.5, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts and availability (service disruption) for affected systems. Impacting 1 product from cisco organizations running these solutions should prioritize assessment and patching.
First disclosed in 2017, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.
2017-04-20T22:59:00.277
2025-04-20T01:37:25.860
Deferred
CVSSv3.0: 7.5 (HIGH)
AV:N/AC:L/Au:N/C:N/I:N/A:C
10.0
6.9
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | cisco | unified_communications_manager | 10.0\(1.10000.12\) | Yes |
| Application | cisco | unified_communications_manager | 10.0_base | Yes |
| Application | cisco | unified_communications_manager | 10.5\(0.98000.88\) | Yes |
| Application | cisco | unified_communications_manager | 10.5\(1.98991.13\) | Yes |
| Application | cisco | unified_communications_manager | 10.5\(1.99995.9\) | Yes |
| Application | cisco | unified_communications_manager | 10.5\(2.10000.5\) | Yes |
| Application | cisco | unified_communications_manager | 10.5\(2.12901.1\) | Yes |
| Application | cisco | unified_communications_manager | 10.5\(2.13900.9\) | Yes |
| Application | cisco | unified_communications_manager | 10.5\(3.10000.9\) | Yes |
| Application | cisco | unified_communications_manager | 10.5_base | Yes |
| Application | cisco | unified_communications_manager | 11.0\(0.98000.225\) | Yes |
| Application | cisco | unified_communications_manager | 11.0\(1.10000.10\) | Yes |
| Application | cisco | unified_communications_manager | 11.5\(0.98000.480\) | Yes |
| Application | cisco | unified_communications_manager | 11.5\(0.98000.486\) | Yes |
| Application | cisco | unified_communications_manager | 11.5\(0.99838.4\) | Yes |
| Application | cisco | unified_communications_manager | 11.5\(1.2\) | Yes |
| Application | cisco | unified_communications_manager | 11.5\(1.10000.6\) | Yes |
| Application | cisco | unified_communications_manager | 11.5\(1.11007.2\) | Yes |
| Application | cisco | unified_communications_manager | 11.5\(1.12000.1\) | Yes |
| Application | cisco | unified_communications_manager | 11.5.0 | Yes |
SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For cisco's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.