CVE-2008-1158 in Unified Presence
Summary
by MITRE
The Presence Engine (PE) service in Cisco Unified Presence before 6.0(1) allows remote attackers to cause a denial of service (core dump and service interruption) via malformed packets, aka Bug ID CSCsh50164.
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Analysis
by VulDB Data Team • 08/10/2019
The vulnerability identified as CVE-2008-1158 affects the Presence Engine service within Cisco Unified Presence software versions prior to 6.0(1). This issue represents a critical denial of service weakness that can be exploited by remote attackers to disrupt the availability of presence services within enterprise communication environments. The vulnerability specifically manifests through the processing of malformed network packets that are sent to the affected service, leading to unexpected system behavior and complete service interruption.
The technical flaw resides in the insufficient input validation mechanisms within the Presence Engine service implementation. When the service receives malformed packets that do not conform to expected protocols or data structures, the processing logic fails to properly handle these unexpected inputs. This failure condition triggers a core dump event within the operating system, which subsequently results in the complete termination and restart of the presence service. The vulnerability operates at the network protocol level where the service processes incoming presence-related communications, making it particularly dangerous as it can be exploited without requiring authentication or privileged access.
The operational impact of this vulnerability extends beyond simple service interruption to encompass significant business continuity concerns within organizations that rely on Cisco Unified Presence for real-time communication and collaboration services. When exploited, the vulnerability can cause cascading failures across integrated communication systems, affecting user availability, presence status updates, and overall collaboration effectiveness. The core dump generation indicates that the system is unable to recover gracefully from the malformed packet input, resulting in complete service disruption that requires manual intervention and system restarts. This vulnerability particularly affects enterprise environments where presence services are critical for workforce coordination and real-time communication workflows.
Organizations affected by this vulnerability should implement immediate mitigations including applying the official Cisco security patches released as part of the 6.0(1) software update, which address the input validation issues in the Presence Engine service. Network segmentation and access control measures can provide additional defense-in-depth by limiting direct exposure of the presence service to untrusted networks. Monitoring and logging configurations should be enhanced to detect unusual packet patterns that may indicate exploitation attempts. This vulnerability aligns with CWE-129, Input Validation, and represents a classic example of a buffer overflow or input handling error that can lead to denial of service conditions. From an ATT&CK framework perspective, this vulnerability maps to the T1499.004 technique for Network Denial of Service, where adversaries leverage service weaknesses to disrupt availability. The remediation process should also include comprehensive testing of the patched environment to ensure that the vulnerability has been properly addressed without introducing new service disruptions or compatibility issues.