CVE-2012-1854 is a high-severity vulnerability affecting Microsoft Office products, specifically found in VBE6.dll. This vulnerability allows local users to gain privileges through a Trojan horse DLL placed in the current working directory. The issue has been present since at least July 2012 and poses a significant risk for organizations utilizing these versions of Microsoft Office.
With a CVSS score of 7.8, this vulnerability is classified as high severity. The risk to organizations includes potential unauthorized privilege escalation, which could lead to further exploitation of sensitive data or critical assets. It is crucial that organizations address this vulnerability with urgency as it has been exploited in the wild.
As a result, organizations should prioritize patching immediately. The vulnerability primarily affects Microsoft Office 2003 SP3, 2007 SP2 and SP3, and 2010 Gold and SP1, along with Microsoft Visual Basic for Applications (VBA).
The urgency for defenders cannot be overstated; failure to remediate can lead to severe consequences, including unauthorized access to systems and data. Organizations are advised to review their systems for affected versions and apply necessary patches as soon as possible.
Vulnerability Details
The vulnerability identified as CVE-2012-1854 is characterized by an untrusted search path vulnerability in VBE6.dll, impacting multiple versions of Microsoft Office, including 2003 SP3, 2007 SP2 and SP3, and 2010 Gold and SP1. This vulnerability allows local users to gain elevated privileges by utilizing a Trojan horse DLL in the current working directory. This security flaw is also known as the 'Visual Basic for Applications Insecure Library Loading Vulnerability.' It was actively exploited in July 2012.
The CVSS score for this vulnerability is 7.8, indicating a high severity level. It has a low attack complexity, requires no privileges, but does necessitate user interaction. The potential impacts include high confidentiality, integrity, and availability risks, making this a critical security concern.
Affected products include Microsoft Office and its associated components, specifically the Visual Basic for Applications SDK. The publication date for this vulnerability was July 10, 2012.
Technical Analysis
The root cause of CVE-2012-1854 lies in the insecure handling of DLL files by the VBE6.dll component of Microsoft Office. This allows local users to execute arbitrary code by placing a malicious DLL in the current working directory. The attack vector is local, meaning that an attacker must have physical access to the system or be able to execute code in the context of a user session.
The attack complexity is classified as low, as an attacker does not require special privileges to exploit this vulnerability. However, it does require user interaction, as the user must open or interact with a document that triggers the execution of the malicious DLL.
In terms of impacts, this vulnerability can result in high confidentiality, integrity, and availability impacts, as attackers may leverage this vulnerability to escalate privileges and execute arbitrary code, potentially leading to data breaches or loss of functionality.
Risk & Impact Analysis
Organizations face significant risks from this vulnerability, particularly those that utilize the affected versions of Microsoft Office. The blast radius for this vulnerability is considerable, as it could impact any user with local access to the affected software. Given its history of exploitation, organizations must understand that failure to apply mitigation measures could lead to unauthorized access and significant data breaches.
The urgency of remediation is further underscored by its inclusion in the Known Exploited Vulnerabilities (KEV) catalog, indicating that it is actively being targeted by threat actors. Organizations should assess their risk based on the CVSS score of 7.8 and the EPSS score of 0.042, which indicates a high likelihood of exploitation in real-world scenarios.
Organizations should schedule remediation as soon as possible to mitigate risks associated with this vulnerability. Patching is critical to ensure that systems are safeguarded against potential exploitation.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | Yes |
Ransomware Use | No |
Affected Versions
The affected versions of Microsoft Office include:
• Microsoft Office 2003 SP3
• Microsoft Office 2007 SP2 and SP3
• Microsoft Office 2010 Gold and SP1
• Microsoft Visual Basic for Applications
• Microsoft Visual Basic for Applications SDK
Mitigation & Remediation
Organizations should apply the patch released in Microsoft Security Bulletin MS12-046 to remediate this vulnerability. If a patch is unavailable, organizations should consider workarounds, such as restricting the execution of untrusted DLLs and validating the integrity of files in the working directory.
Configuration hardening is recommended to mitigate the risk associated with this vulnerability. Additionally, organizations should implement network controls to monitor for unauthorized access attempts and conduct regular security audits to ensure compliance with best practices.
Continuous security testing can also help identify similar vulnerabilities in the environment.
Detection Guidance
Security teams should monitor logs for unusual access patterns or failed attempts to load DLLs. Behavioral anomalies, such as unexpected changes to file paths or the execution of unauthorized programs, may indicate attempts to exploit this vulnerability.
Network signatures can be established to detect anomalous behavior associated with the exploitation of this vulnerability. Additionally, changes to critical system files should be logged and reviewed regularly.
AppSecure Threat Intelligence Insight
CVE-2012-1854 highlights the ongoing risks associated with insecure library loading practices. This vulnerability serves as a reminder for organizations to implement secure coding practices and regularly review their software supply chains for vulnerabilities.
The trend of untrusted search paths leading to privilege escalation should prompt security teams to reassess their internal controls. Organizations are encouraged to develop a comprehensive vulnerability management program that includes regular assessments and penetration testing.
By addressing vulnerabilities like CVE-2012-1854 proactively, organizations can better defend against potential attacks and reduce the risk of future exploitation.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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