CVE-2007-3776 in Unified Communications Manager
Summary
by MITRE
Cisco Unified Communications Manager (CUCM, formerly CallManager) and Unified Presence Server (CUPS) allow remote attackers to obtain sensitive information via unspecified vectors that reveal the SNMP community strings and configuration settings, aka (1) CSCsj20668 and (2) CSCsj25962.
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Analysis
by VulDB Data Team • 03/02/2018
Cisco Unified Communications Manager and Unified Presence Server contain a vulnerability that enables remote attackers to extract sensitive configuration data through unspecified attack vectors. This vulnerability affects both the CUCM and CUPS components of Cisco's unified communications platform, creating a significant security risk for organizations relying on these systems for voice and presence services. The flaw specifically exposes SNMP community strings and broader configuration settings that should remain protected within enterprise networks.
The technical nature of this vulnerability stems from insufficient access controls and information disclosure mechanisms within the Cisco unified communications software. Attackers can exploit unspecified vectors to gain unauthorized access to sensitive system parameters that are typically restricted to authorized administrators. This type of vulnerability falls under the category of information disclosure flaws that can be categorized as CWE-200, which specifically addresses information exposure. The vulnerability allows for the extraction of SNMP community strings which serve as passwords for network management protocols, effectively providing attackers with credentials to manipulate and monitor network devices.
The operational impact of this vulnerability extends beyond simple information disclosure, as it can enable attackers to establish persistent access to enterprise communication systems. When SNMP community strings are compromised, attackers gain the ability to perform network reconnaissance, monitor traffic, and potentially manipulate communication services. This vulnerability can be exploited as part of a broader attack chain that aligns with ATT&CK technique T1082, which involves discovering system information, and T1566, which covers credential harvesting through social engineering. Organizations may face significant disruption to their unified communications infrastructure, including potential interception of voice traffic and unauthorized access to presence information.
The implications for enterprise security are substantial as this vulnerability affects critical communication infrastructure components. Network administrators who rely on these systems for voice services, collaboration tools, and presence management face increased risk of unauthorized access and potential data breaches. The exposure of configuration settings can reveal network topology information, system versions, and other sensitive operational details that attackers can use for further exploitation. This vulnerability demonstrates the critical importance of maintaining updated security measures and implementing proper access controls for unified communications platforms.
Mitigation strategies should include immediate implementation of security patches provided by Cisco to address the specific vulnerability. Organizations should also implement network segmentation to limit access to unified communications systems and enforce strict access controls for SNMP configurations. Regular security assessments of communication infrastructure and monitoring for unauthorized access attempts are essential defensive measures. The vulnerability underscores the need for comprehensive security practices that include proper credential management, regular system updates, and adherence to security frameworks such as NIST SP 800-53 that address information system security controls. Additionally, organizations should consider implementing network monitoring solutions that can detect anomalous access patterns to unified communications systems and provide alerts for potential exploitation attempts.