CVE-2013-1302 in Lync
Summary
by MITRE
Microsoft Communicator 2007 R2, Lync 2010, Lync 2010 Attendee, and Lync Server 2013 do not properly handle objects in memory, which allows remote attackers to execute arbitrary code via an invitation that triggers access to a deleted object, aka "Lync RCE Vulnerability."
Be aware that VulDB is the high quality source for vulnerability data.
Analysis
by VulDB Data Team • 12/28/2024
The CVE-2013-1302 vulnerability represents a critical remote code execution flaw affecting Microsoft Communicator 2007 R2, Lync 2010, Lync 2010 Attendee, and Lync Server 2013 products. This vulnerability stems from improper memory management practices within the affected Microsoft communication platforms, creating a dangerous condition where attackers can manipulate memory objects to execute malicious code remotely. The flaw specifically manifests when the applications process invitations that contain malformed objects, leading to a scenario where deleted memory objects are accessed, creating a path for arbitrary code execution.
The technical nature of this vulnerability aligns with CWE-476, which describes NULL pointer dereference conditions that can lead to memory access violations. The vulnerability occurs during the processing of invitation objects within the Lync communication stack, where the application fails to properly validate or manage object lifecycles. When a specially crafted invitation is received, the system attempts to access memory that has already been freed or deleted, causing a memory corruption condition that attackers can exploit to inject and execute malicious code with the privileges of the affected application. This type of vulnerability falls under the ATT&CK technique T1059.007 for command and scripting interpreter, as successful exploitation would enable attackers to execute arbitrary commands on the compromised system.
The operational impact of this vulnerability is severe for organizations relying on Microsoft Lync and Communicator platforms, as it provides remote attackers with complete system compromise capabilities. Attackers can leverage this vulnerability to establish persistent access, escalate privileges, and potentially move laterally within networks where these communication platforms are deployed. The vulnerability affects both client and server components, meaning that a single malicious invitation could compromise multiple systems within an organization. Organizations with widespread Lync deployments face significant risk, as the attack surface extends across all users who might receive invitations through various communication channels.
Mitigation strategies for CVE-2013-1302 should prioritize immediate patch deployment from Microsoft, as the vendor released security updates specifically addressing this memory management flaw. Network segmentation and access controls should be implemented to limit the exposure of Lync servers to untrusted networks. Organizations should also consider implementing email filtering solutions that can detect and block suspicious invitation content, particularly focusing on attachments or links that might trigger the vulnerable code paths. Regular security assessments should monitor for any unauthorized access attempts or unusual network activity that might indicate exploitation attempts. The vulnerability demonstrates the critical importance of proper memory management practices and highlights the need for comprehensive application security testing, particularly for communication platforms that handle external invitations and data from untrusted sources.