CVE-2016-1323 in Spark
Summary
by MITRE
The REST interface in Cisco Spark 2015-06 allows remote authenticated users to obtain sensitive information via a request for an unspecified file, aka Bug ID CSCuv84048.
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Analysis
by VulDB Data Team • 08/22/2018
The vulnerability identified as CVE-2016-1323 affects the REST interface of Cisco Spark version 2015-06, representing a critical information disclosure flaw that enables remote authenticated attackers to access sensitive data. This vulnerability resides within the application's web interface implementation and specifically targets the handling of file requests through the REST API endpoints. The issue manifests when legitimate authenticated users make requests for unspecified files, potentially exposing confidential information that should remain protected within the system's internal structures.
The technical nature of this vulnerability aligns with CWE-200, which categorizes information exposure flaws where sensitive data is accessible to unauthorized parties. The flaw occurs in the REST interface's file handling mechanism, where proper input validation and access control measures are insufficient to prevent unauthorized data retrieval. Attackers can exploit this weakness by crafting specific requests that target internal files or resources that are not properly protected from access by authenticated users who should not have such privileges. The vulnerability's classification as a remote authenticated attack vector indicates that exploitation requires valid credentials but does not necessitate physical access or complex local privileges.
From an operational impact perspective, this vulnerability poses significant risks to organizations using Cisco Spark for collaboration and communication. The exposure of sensitive information could include user credentials, internal system configurations, communication metadata, or other confidential data that could be leveraged for further attacks. The attack surface is particularly concerning given that Cisco Spark is designed for enterprise communication, where the compromise of information disclosure vulnerabilities can lead to data breaches, regulatory compliance violations, and reputational damage. The vulnerability's potential for lateral movement within networks increases the overall risk profile, as attackers could use the leaked information to plan more sophisticated attacks against other system components.
The security implications extend beyond immediate data exposure, as this vulnerability represents a fundamental flaw in the application's access control implementation. Attackers with valid accounts can potentially escalate their privileges or gain insights into the system architecture that would normally be restricted. This type of vulnerability often serves as a stepping stone for more advanced attacks, as the leaked information can be used to identify system weaknesses, user patterns, or network configurations that would otherwise remain hidden. Organizations should consider implementing additional monitoring and access control measures to detect and prevent unauthorized data access attempts.
Mitigation strategies for CVE-2016-1323 should focus on immediate patching of the affected Cisco Spark version, as well as implementing additional security controls such as enhanced access logging, input validation enforcement, and network segmentation. Organizations should review their authentication and authorization mechanisms to ensure that even authenticated users cannot access resources beyond their intended scope. The implementation of web application firewalls and security monitoring systems can help detect anomalous file access patterns that may indicate exploitation attempts. Additionally, regular security assessments and vulnerability scanning should be conducted to identify similar flaws in other applications and systems within the organization's infrastructure, as this vulnerability type often indicates broader architectural security issues that require comprehensive remediation approaches.