CVE-2014-8020 in Unified Communications Domain Manager
Summary
by MITRE
Cisco Unified Communication Domain Manager Platform Software allows remote attackers to cause a denial of service (CPU consumption, and performance degradation or service outage) via a flood of malformed TCP packets and UDP packets, aka Bug ID CSCup25276.
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Analysis
by VulDB Data Team • 04/10/2022
The vulnerability identified as CVE-2014-8020 affects the Cisco Unified Communication Domain Manager Platform Software, representing a significant security weakness that enables remote attackers to execute denial of service attacks against affected systems. This flaw specifically targets the platform's handling of network traffic, particularly TCP and UDP packet processing, creating a scenario where legitimate service availability can be compromised through malicious packet flooding. The vulnerability resides within the network protocol stack implementation of the Cisco Unified Communications platform, which is widely deployed in enterprise communication environments where continuous availability of voice and video services is critical.
The technical exploitation of this vulnerability occurs through the systematic transmission of malformed TCP and UDP packets to the affected Cisco Unified Communications Domain Manager platform. When these malformed packets are processed by the vulnerable software, they trigger abnormal CPU consumption patterns that can escalate to complete system performance degradation or full service outages. The flaw essentially represents a resource exhaustion attack vector where attackers can consume system resources without requiring authentication or specific privileges, making it particularly dangerous in production environments. The vulnerability manifests as the platform's inability to properly validate or handle malformed network packets, leading to inefficient processing cycles that consume excessive computational resources.
From an operational impact perspective, this vulnerability poses severe risks to enterprise communication infrastructures that rely on Cisco Unified Communications Domain Manager platforms. Organizations may experience complete disruption of voice and video services, leading to business continuity issues and potential financial losses during critical communication periods. The attack can be executed remotely without requiring any special access credentials, making it accessible to a broad range of threat actors from casual attackers to organized groups. The performance degradation can be gradual or immediate depending on the volume of malicious packets, with some attacks potentially causing system crashes that require manual intervention and system restarts.
The vulnerability aligns with CWE-129, which addresses issues related to input validation and resource management in network protocol implementations, and represents a classic example of a resource exhaustion attack pattern. From an ATT&CK framework perspective, this vulnerability maps to the T1498 technique for network denial of service, where adversaries leverage system weaknesses to consume resources and prevent legitimate use of network services. The attack vector specifically demonstrates the T1071.004 sub-technique related to application layer protocol usage, where attackers exploit weaknesses in application-level protocols to achieve their objectives. Organizations should implement network segmentation and access control measures to limit exposure, while also ensuring timely application of vendor security patches. The vulnerability underscores the critical importance of maintaining up-to-date security configurations and implementing proper network monitoring to detect anomalous packet traffic patterns that may indicate exploitation attempts.
Mitigation strategies should include implementing network access control lists to filter malformed packets, deploying intrusion prevention systems that can detect and block suspicious traffic patterns, and establishing robust monitoring protocols to identify unusual CPU consumption spikes. Organizations should also consider implementing rate limiting mechanisms and network traffic analysis tools that can identify the specific characteristics of the malicious packet flooding. Regular vulnerability assessments and security audits should be conducted to ensure that all Cisco Unified Communications platforms are properly patched and configured according to industry best practices. The remediation process requires immediate application of Cisco's security advisories and patches, followed by verification of system stability and performance metrics to confirm successful mitigation of the vulnerability.