An issue was discovered in PDF24 Creator 11.14.0. The configuration of the msi installer file was found to produce a visible cmd.exe window when using the repair function of msiexec.exe. This allows an unprivileged local attacker to use a chain of actions (e.g., an oplock on faxPrnInst.log) to open a SYSTEM cmd.exe.
The CVSS score for this vulnerability is 7.8, categorizing it as high severity. This indicates that the vulnerability poses significant risks to organizations, particularly given its ability to allow local attackers elevated access to system commands.
The high risk to organizations includes potential unauthorized access to sensitive data and system manipulation, which can lead to further exploitation or data breaches. Organizations should prioritize patching immediately.
As of now, there is no public exploit confirmed for this vulnerability, and it is not listed as actively exploited in the known exploitation vulnerability (KEV) database.
Vulnerability Details
The vulnerability allows a local attacker to leverage the configuration of the msi installer, specifically when the repair function is invoked. The relevant CVSS metrics indicate a local attack vector with low complexity and privileges required, making it relatively easy for attackers to exploit.
In detail, the CVSS vector string for this vulnerability is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. This highlights the potential high impact on confidentiality, integrity, and availability.
Affected products include PDF24 Creator with versions prior to 11.15.2. The vulnerability was published on December 19, 2023.
Technical Analysis
The root cause of this issue lies in the msi installer configuration, which inadvertently opens a command window that can be exploited. The attack vector is local, meaning that an attacker must have physical or remote access to the system where PDF24 Creator is installed.
Attack complexity is classified as low, as attackers do not need advanced skills to exploit this vulnerability, only the ability to execute the repair function. Privileges required are also low, enabling unprivileged users to initiate the exploit.
User interaction is not required for the exploitation, making this vulnerability particularly concerning. The impact on confidentiality, integrity, and availability is rated high, indicating that successful exploitation could lead to severe consequences for affected systems.
Risk & Impact Analysis
Organizations face significant exposure if they do not address this vulnerability promptly. Given the nature of the vulnerability, attackers could gain SYSTEM-level access and manipulate critical system operations, leading to unauthorized data access and potential breaches.
The blast radius for this vulnerability extends to all installations of PDF24 Creator prior to the patched version, impacting potentially numerous systems in an organizational environment. The urgency for remediation is high due to the CVSS score of 7.8, necessitating immediate attention.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected version of PDF24 Creator is 11.14.0, with the vulnerability present in all versions prior to 11.15.2.
Mitigation & Remediation
Organizations should upgrade to PDF24 Creator version 11.15.2 or later to remediate this vulnerability. If immediate patching is not feasible, consider implementing workarounds such as restricting access to the repair function and monitoring system logs for suspicious activities.
Regular security assessments and penetration testing are recommended to identify and mitigate similar vulnerabilities in the future.
Detection Guidance
To detect potential exploitation attempts, organizations should monitor for unusual cmd.exe processes initiated during the repair function of PDF24 Creator. Log analysis should include indicators of privilege escalation attempts.
AppSecure Threat Intelligence Insight
This vulnerability highlights the criticality of secure installer configurations. Organizations must be vigilant against similar vulnerabilities in software installations and ensure proper security measures are in place.
The pattern of local privilege escalation vulnerabilities signifies a trend that requires attention from security teams. Regular audits of software configurations and the implementation of stringent security protocols can mitigate such risks.
For further insights on vulnerability management, refer to our vulnerability management program and how it can help improve your overall security posture.
Staying informed on the latest security trends and threats is crucial for proactive defense strategies. Engaging in continuous education and training can equip teams to better handle emerging vulnerabilities.
For more information on penetration testing methodologies, check out our penetration testing methodology.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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