CVE-2008-1747 in Unified Callmanager
Summary
by MITRE
Unspecified vulnerability in Cisco Unified Communications Manager 4.1 before 4.1(3)SR6, 4.2 before 4.2(3)SR3, 4.3 before 4.3(2), 5.x before 5.1(3), and 6.x before 6.1(1) allows remote attackers to cause a denial of service (CCM service restart) via an unspecified SIP INVITE message, aka Bug ID CSCsk46944.
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Analysis
by VulDB Data Team • 08/10/2019
Cisco Unified Communications Manager suffers from an unspecified vulnerability that enables remote attackers to trigger a denial of service condition through specially crafted SIP INVITE messages. This vulnerability affects multiple versions of the unified communications platform including 4.1 before 4.1(3)SR6, 4.2 before 4.2(3)SR3, 4.3 before 4.3(2), 5.x before 5.1(3), and 6.x before 6.1(1). The flaw manifests when the system processes malicious SIP INVITE requests that cause the Cisco Unified Communications Manager service to restart unexpectedly, effectively disrupting communication services for legitimate users. The vulnerability falls under the category of unspecified security flaws that can lead to service disruption, representing a critical weakness in the SIP processing mechanism of the unified communications infrastructure. This type of vulnerability aligns with CWE-119 which addresses memory-related issues in software systems, and may also relate to CWE-20 which covers input validation problems that can result in unexpected behavior when processing external data. The attack vector operates through the network layer where SIP messages are transmitted, making it accessible to remote adversaries who can exploit the flaw without requiring local system access or authentication credentials. The impact of this vulnerability extends beyond simple service interruption as it can compromise the reliability and availability of critical communication infrastructure within enterprise environments. Organizations relying on Cisco Unified Communications Manager for voice and video communications face significant operational risks when this vulnerability remains unpatched, as attackers can repeatedly exploit the flaw to cause persistent service disruptions. The vulnerability demonstrates how seemingly minor flaws in protocol handling can result in substantial service degradation, particularly in mission-critical communication systems where uptime is essential for business operations. According to ATT&CK framework, this vulnerability could be categorized under T1499 which covers network denial of service attacks, specifically targeting network infrastructure components. The exploitation of this vulnerability requires minimal technical expertise and can be automated, making it particularly dangerous for organizations with insufficient security monitoring in place. The affected versions of Cisco Unified Communications Manager represent a broad range of releases that were widely deployed in enterprise environments, increasing the potential attack surface for this vulnerability. Organizations should prioritize patch management to address this vulnerability through the official Cisco security advisories and updates. The remediation process involves upgrading to patched versions of Cisco Unified Communications Manager that contain fixes for the SIP processing logic. Security teams should also implement network segmentation and monitoring to detect unusual SIP traffic patterns that might indicate exploitation attempts. Additionally, organizations should consider implementing intrusion detection systems that can identify and alert on malformed SIP INVITE messages that could trigger the vulnerability. The broader implications of this vulnerability highlight the importance of robust input validation and error handling in communication protocols, particularly in enterprise-grade unified communications systems where reliability and availability are paramount for business continuity.