CVE-2015-0626 in Hosted Collaboration Solution
Summary
by MITRE
The SOAP interface in Cisco Hosted Collaboration Solution (HCS) allows remote attackers to obtain access to system-management tools via crafted Challenge SOAP calls, aka Bug ID CSCuc38114.
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Analysis
by VulDB Data Team • 04/13/2018
The vulnerability identified as CVE-2015-0626 represents a critical security flaw within Cisco Hosted Collaboration Solution (HCS) that exposes system-management tools to unauthorized remote access through manipulated SOAP interface communications. This vulnerability specifically targets the SOAP interface implementation in Cisco HCS, which serves as the primary mechanism for system administration and management operations. The flaw enables attackers to exploit the challenge-response authentication mechanism by crafting specially designed SOAP calls that bypass normal access controls and authentication procedures. The vulnerability is particularly concerning because it allows remote attackers to gain access to sensitive system-management tools without requiring legitimate credentials or authentication, effectively providing unauthorized administrative access to the underlying collaboration infrastructure.
The technical implementation of this vulnerability stems from improper handling of Challenge SOAP calls within the HCS SOAP interface. When legitimate authentication challenges are processed, the system fails to properly validate or sanitize the incoming SOAP requests, allowing malicious actors to manipulate the challenge-response sequence to gain unauthorized access. This flaw falls under the category of inadequate input validation and authentication bypass mechanisms, which are commonly classified as CWE-287 (Improper Authentication) and CWE-345 (Insufficient Verification of Data Authenticity). The vulnerability exists due to the system's failure to properly verify the integrity and authenticity of the challenge parameters, creating a pathway for attackers to escalate privileges and access administrative functions through crafted requests.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it provides attackers with comprehensive control over system management tools that are typically restricted to authorized administrators. This access could enable attackers to modify system configurations, access sensitive user data, manipulate collaboration services, and potentially establish persistent access points within the network infrastructure. The remote nature of the attack means that adversaries can exploit this vulnerability from outside the network perimeter, significantly expanding the attack surface and reducing the effectiveness of traditional network-based security controls. From an adversarial perspective, this vulnerability aligns with ATT&CK technique T1078 (Valid Accounts) and T1566 (Phishing for Information) as attackers can leverage this flaw to obtain legitimate administrative access without traditional credential theft methods.
Organizations utilizing Cisco HCS deployments face significant risks from this vulnerability, particularly those with limited network segmentation or insufficient monitoring of SOAP interface communications. The attack vector does not require any specialized tools or deep technical knowledge beyond basic SOAP protocol understanding, making it accessible to a broad range of threat actors. Remediation efforts should focus on implementing proper input validation for SOAP requests, strengthening authentication mechanisms, and applying Cisco's official security patches and updates. Network monitoring should be enhanced to detect unusual SOAP traffic patterns, and access controls should be reviewed to ensure that only authorized systems can communicate with the SOAP interface. Additionally, implementing network segmentation and firewall rules to restrict access to the SOAP interface can provide additional layers of defense against exploitation attempts. The vulnerability demonstrates the critical importance of proper authentication implementation in web service interfaces and highlights the need for continuous security assessment of enterprise collaboration platforms.