A vulnerability in the common Session Initiation Protocol (SIP) library of Cisco IOS and IOS XE Software could allow an unauthenticated, remote attacker to trigger a reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to insufficient sanity checks on an internal data structure. An attacker could exploit this vulnerability by sending a sequence of malicious SIP messages to an affected device. An exploit could allow the attacker to cause a NULL pointer dereference, resulting in a crash of the iosd process. This triggers a reload of the device.
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 17 products from cisco, from cisco, from cisco and 14 others, organizations running these solutions should prioritize assessment and patching.
First disclosed in 2019, 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.
2019-09-25T21:15:10.717
2024-11-21T04:23:16.343
Modified
CVSSv3.1: 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? |
|---|---|---|---|---|
| Operating System | cisco | ios_xe | 15.6\(1\)s4.2 | Yes |
| Operating System | cisco | ios_xe | 16.3.8 | Yes |
| Operating System | cisco | ios_xe | 16.9.1 | Yes |
| Hardware | cisco | 1000_integrated_services_router | - | No |
| Hardware | cisco | 1100_integrated_services_router | - | No |
| Hardware | cisco | 4000_integrated_services_router | - | No |
| Hardware | cisco | 4221_integrated_services_router | - | No |
| Hardware | cisco | 4321_integrated_services_router | - | No |
| Hardware | cisco | 4331_integrated_services_router | - | No |
| Hardware | cisco | 4351_integrated_services_router | - | No |
| Hardware | cisco | 4431_integrated_services_router | - | No |
| Hardware | cisco | 4451-x_integrated_services_router | - | No |
| Hardware | cisco | asr_1000 | - | No |
| Hardware | cisco | asr_1001-hx | - | No |
| Hardware | cisco | asr_1001-x | - | No |
| Hardware | cisco | asr_1002-hx | - | No |
| Hardware | cisco | asr_1002-x | - | No |
| Hardware | cisco | cloud_services_router_1000v | - | No |
| Hardware | cisco | integrated_services_virtual_router | - | No |
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.