CVE-2012-0192 in Lotus Symphony
Summary
by MITRE
Multiple integer overflows in vclmi.dll in the visual class library module in IBM Lotus Symphony before 3.0.1 might allow remote attackers to execute arbitrary code via an embedded (1) JPEG or (2) PNG image object in a Symphony document that triggers a heap-based buffer overflow, as demonstrated by a .doc file.
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Analysis
by VulDB Data Team • 03/20/2021
The vulnerability identified as CVE-2012-0192 represents a critical security flaw in IBM Lotus Symphony's visual class library module, specifically within the vclmi.dll component. This vulnerability stems from multiple integer overflows that occur when processing embedded image objects within Symphony documents, creating a pathway for remote code execution attacks. The flaw affects IBM Lotus Symphony versions prior to 3.0.1, making it particularly concerning given the widespread use of this productivity suite in enterprise environments.
The technical implementation of this vulnerability involves improper handling of integer values during the processing of embedded graphic files, specifically JPEG and PNG image formats. When a maliciously crafted document containing these image objects is opened, the integer overflows in the vclmi.dll module cause heap-based buffer overflows to occur. This buffer overflow condition allows attackers to manipulate memory layout and potentially execute arbitrary code with the privileges of the affected application. The vulnerability is particularly dangerous because it can be triggered through routine document operations, making it difficult to detect and prevent through standard security measures.
The operational impact of CVE-2012-0192 extends beyond simple code execution, as it represents a sophisticated attack vector that leverages the document processing capabilities of a widely deployed enterprise application. Attackers can craft malicious .doc files containing embedded images that, when opened by an unpatched Symphony user, trigger the integer overflow conditions. This creates a remote exploitation scenario where network-based attacks can compromise systems without requiring user interaction beyond opening the malicious document. The vulnerability's classification aligns with CWE-190, which specifically addresses integer overflow conditions, and represents a classic example of how buffer overflow vulnerabilities can be exploited in modern software applications.
From a threat modeling perspective, this vulnerability demonstrates the importance of proper input validation and memory management in enterprise software. The attack surface is particularly concerning given that IBM Lotus Symphony was commonly used in business environments where users frequently open documents from external sources, creating numerous potential attack vectors. The vulnerability's exploitation requires minimal user interaction, making it particularly dangerous in targeted attack scenarios. Organizations implementing the ATT&CK framework would classify this as a technique involving "Exploitation for Client Execution" where the attack chain involves leveraging software vulnerabilities to execute malicious code.
Mitigation strategies for CVE-2012-0192 primarily focus on immediate patch management and application updates to IBM Lotus Symphony 3.0.1 or later versions. System administrators should prioritize deployment of the official IBM security patches that address the integer overflow conditions in the vclmi.dll module. Additionally, organizations should implement document validation policies that restrict the opening of documents from untrusted sources and consider deploying application whitelisting solutions to prevent execution of vulnerable components. Network-based controls such as email filtering and web proxies can help reduce the risk of initial compromise through malicious document delivery. The vulnerability serves as a reminder of the critical importance of maintaining current security patches and implementing comprehensive software vulnerability management programs to protect against similar exploitation scenarios.