CVE-2015-4299 in Unified Web
Summary
by MITRE
Cisco Unified Web and E-Mail Interaction Manager 9.0(2) improperly performs authorization, which allows remote authenticated users to remove default messaging-queue system folders via unspecified vectors, aka Bug ID CSCuo89046.
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Analysis
by VulDB Data Team • 06/12/2022
Cisco Unified Web and E-Mail Interaction Manager version 9.0(2) contains a critical authorization flaw that enables remote authenticated attackers to manipulate system messaging queues through unspecified vectors. This vulnerability falls under the CWE-285 category of Improper Authorization, where the system fails to properly validate user permissions before allowing destructive operations. The flaw specifically affects the default messaging-queue system folders, which are fundamental components of the interaction manager's core functionality. Attackers with valid authentication credentials can exploit this weakness to delete critical system folders, potentially disrupting email and web interaction services. The vulnerability represents a significant escalation risk as it allows attackers to compromise the integrity of the messaging infrastructure through authorized access points. The unspecified vectors suggest that the attack surface may encompass multiple interaction methods within the unified platform, making it particularly challenging to defend against. This issue impacts organizations relying on Cisco's unified communication solutions where the interaction manager serves as a critical component for handling email and web-based customer interactions. The bug ID CSCuo89046 indicates this was tracked internally as a specific vulnerability within Cisco's quality assurance system, highlighting the potential for widespread impact across deployments using this particular software version.
The technical exploitation of this vulnerability demonstrates a fundamental flaw in the authorization mechanism of the interaction manager's messaging system. Remote authenticated users can leverage their valid credentials to perform unauthorized deletions of system folders that are typically protected from modification by regular users. This authorization bypass occurs at the application level where the system should enforce strict access controls but fails to validate the user's privilege level before executing destructive operations. The messaging-queue system folders represent the backbone of the interaction manager's email processing capabilities, and their removal would result in complete service disruption for email-based interactions. The vulnerability's remote nature means attackers do not require physical access to the system or local network presence, making it particularly dangerous for organizations with distributed user bases. The improper authorization implementation creates a path for privilege escalation where standard authenticated users can perform actions reserved for administrative personnel. This flaw aligns with ATT&CK technique T1078.004 for Valid Accounts and T1485 for Data Destruction, as it allows for unauthorized access to system resources and potential data loss through folder deletion operations. The impact extends beyond simple service disruption to include potential information disclosure and system integrity compromise.
Organizations affected by CVE-2015-4299 face significant operational risks including complete service interruption for email and web interaction capabilities, potential data loss from deleted system folders, and increased attack surface for subsequent exploitation attempts. The vulnerability could enable attackers to create persistent access points by manipulating system folders, potentially leading to further compromise of the unified communication infrastructure. Recovery from such an attack would require system restoration from backups, potentially resulting in data loss and service downtime. The impact on business continuity is substantial as customer interaction channels become unavailable, affecting support operations and potentially leading to revenue loss. Organizations with multiple interaction manager deployments across their network infrastructure face cascading effects where a single compromised system could impact broader communication capabilities. The vulnerability's classification as a remote authenticated issue means that attackers could exploit it from anywhere on the internet, increasing the attack surface and making it particularly attractive to threat actors. Security teams must implement immediate monitoring for unauthorized folder deletion activities and establish robust backup procedures to ensure rapid recovery. The incident would likely trigger compliance violations for organizations subject to regulatory requirements for system integrity and data protection, particularly in industries with strict communication service availability mandates.
Mitigation strategies for CVE-2015-4299 should focus on immediate software updates and access control hardening. Organizations must apply the relevant Cisco security patches and updates to resolve the authorization flaw in the interaction manager software. Network segmentation should be implemented to limit access to interaction manager components, reducing the potential impact of successful exploitation attempts. Enhanced monitoring of system folder access and modification activities should be deployed to detect unauthorized deletion attempts. User privilege management must be strictly enforced with principle of least privilege implementation, ensuring that only authorized administrators can access critical system folders. Regular security assessments should be conducted to identify similar authorization flaws in other system components. The implementation of automated backup solutions for messaging queue configurations ensures rapid recovery capabilities in case of successful exploitation. Security teams should also consider implementing intrusion detection systems to monitor for patterns associated with this specific vulnerability. Network access controls should be configured to restrict access to interaction manager services to only trusted network segments and IP addresses. Regular vulnerability scanning should be performed to identify other potential authorization bypass opportunities within the unified communication platform. The mitigation approach should align with NIST cybersecurity framework recommendations for system integrity and access control management. Organizations should also develop incident response procedures specifically addressing this type of authorization failure to ensure rapid and effective response to exploitation attempts.