CVE-2021-41780 is a high-severity vulnerability affecting Foxit PDF Reader (versions prior to 11.1), PDF Editor (versions prior to 11.1), and PhantomPDF (versions prior to 10.1.6). This vulnerability allows attackers to trigger a use-after-free condition due to improper handling of JavaScript, which can lead to the execution of arbitrary code.
The CVSS score of 7.8 indicates that this vulnerability poses a significant threat, particularly because it requires user interaction to exploit. Given the potential for unauthorized code execution, organizations must recognize the criticality of addressing this vulnerability promptly.
Risk to organizations includes exposure to arbitrary code execution, which can compromise sensitive data and system integrity. Organizations should prioritize patching immediately.
Currently, there is no known public exploit or proof of concept available for this vulnerability. However, the potential impact is severe enough to warrant immediate attention.
Defenders should monitor for updates from Foxit regarding patches and remediation strategies.
Vulnerability Details
The vulnerability allows attackers to trigger a use-after-free condition, which may lead to arbitrary code execution. The affected components include Foxit PDF Reader, Foxit PDF Editor, and PhantomPDF, all prior to their respective version updates of 11.1 and 10.1.6. The CWE-416 classification indicates the nature of the vulnerability as a use-after-free issue.
The vulnerability was published on August 29, 2022, and has since been modified. The attack vector is local, meaning that an attacker must have access to the user's environment to exploit the vulnerability. The attack complexity is low, requiring no privileges and necessitating user interaction.
The CVSS score breakdown is as follows: Attack Vector (Local), Attack Complexity (Low), Privileges Required (None), User Interaction (Required), Confidentiality Impact (High), Integrity Impact (High), and Availability Impact (High).
Technical Analysis
The root cause of CVE-2021-41780 is a mishandling of JavaScript in the affected Foxit products, leading to a use-after-free error. This type of vulnerability can occur when a program attempts to access memory that has already been freed, which may allow attackers to manipulate the program's state.
The attack vector is local, requiring physical or remote access to the environment where the vulnerable application is running. The attack complexity is low, making it easier for an attacker to exploit this vulnerability without needing significant expertise.
No special privileges are required for exploiting this vulnerability, but user interaction is necessary, as the attacker must convince the user to open a malicious document or execute a specific action within the application.
The impact of a successful exploitation includes high confidentiality, integrity, and availability impacts, as the attacker may execute arbitrary code, potentially leading to complete system compromise.
Risk & Impact Analysis
Organizations using Foxit PDF Reader, PDF Editor, and PhantomPDF face real-world risks due to the potential for arbitrary code execution. The blast radius of this vulnerability is significant, as it affects any user who interacts with the vulnerable applications, especially in environments handling sensitive data.
The urgency of addressing this vulnerability is heightened due to its CVSS score of 7.8, indicating a high level of severity. Organizations should prioritize patching immediately to mitigate the risks associated with this vulnerability.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions for this vulnerability include Foxit PDF Reader and PDF Editor (versions prior to 11.1) and PhantomPDF (versions prior to 10.1.6). If version information is missing, the statement 'All versions prior to vendor patch' applies.
Mitigation & Remediation
To mitigate this vulnerability, organizations should upgrade to the latest versions of Foxit PDF Reader, PDF Editor, and PhantomPDF. The latest versions include critical security patches that address this vulnerability.
If patches are not immediately available, organizations should implement strict access controls and monitor user interactions with the affected applications to reduce potential exploit opportunities.
For comprehensive security, organizations may consider utilizing services such as penetration testing to identify vulnerabilities in their systems.
Detection Guidance
Organizations should monitor application logs for unusual behavior or indicators of exploitation attempts. Key indicators may include unexpected crashes or abnormal application performance.
Additionally, monitoring network traffic for anomalies can help identify exploitation attempts or suspicious activity related to the use of vulnerable applications.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2021-41780 highlights the ongoing risks associated with application vulnerabilities, particularly those that involve memory management errors like use-after-free. Security teams should prioritize regular updates and patch management to prevent similar vulnerabilities.
This vulnerability represents a broader trend of increasing exploitation of local vulnerabilities that require user interaction, which underscores the importance of user awareness training and application security best practices.
For organizations looking to enhance their security posture, resources such as the penetration testing methodology and vulnerability management program design can provide valuable insights and frameworks for improving application security.
Investing in security training and utilizing expert services such as red teaming can significantly enhance an organization's ability to identify and remediate vulnerabilities proactively.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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