CVE-2024-34342 is a high-severity vulnerability affecting react-pdf, which is used for displaying PDFs in React applications. This vulnerability allows attackers to execute unrestricted JavaScript in the context of the hosting domain if PDF.js is configured with `isEvalSupported` set to `true`, the default setting. The execution of malicious JavaScript can lead to significant security risks, including unauthorized access to sensitive data and manipulation of the application.
The CVSS score for this vulnerability is 7.1, categorizing it as high severity. This score reflects the potential impact of the vulnerability, which includes high confidentiality and integrity impacts, and a low availability impact. Organizations utilizing react-pdf should be vigilant in assessing their usage of PDF.js and ensure that appropriate mitigations are in place.
As of now, this vulnerability is confirmed to have an exploit available. Organizations are strongly encouraged to prioritize remediation efforts to prevent potential exploitation. Affected users should also be aware that versions 7.7.3 and 8.0.2 of react-pdf have addressed this issue, and immediate upgrading is advised.
Given the nature of the vulnerability and its implications, organizations should prioritize patching immediately. Failure to address this vulnerability could result in severe ramifications, including data breaches and loss of customer trust.
Vulnerability Details
The official description of CVE-2024-34342 highlights that if PDF.js loads a malicious PDF with `isEvalSupported` set to `true`, unrestricted attacker-controlled JavaScript will execute within the hosting domain. This vulnerability is classified under CWE-79 (Improper Neutralization of Input During Web Page Generation).
The vulnerability was published on May 7, 2024, and the affected versions are all prior to 7.7.3 and 8.0.2. Organizations should ensure they are using the patched versions to avoid exposure to this vulnerability.
Technical Analysis
The root cause of this vulnerability stems from the configuration of PDF.js, specifically the `isEvalSupported` option. When set to true, it allows for the execution of JavaScript, which can be exploited by attackers to execute arbitrary code.
The attack vector for this vulnerability is categorized as network-based, requiring an attacker to trick a victim into opening a malicious PDF in a vulnerable environment. The attack complexity is considered high, as user interaction is necessary to initiate the attack. No privileges are required to exploit this vulnerability, which increases the likelihood of successful exploitation.
In terms of impact, this vulnerability poses a high risk to confidentiality and integrity, as attackers can execute code that may exfiltrate sensitive data or manipulate application behavior. The availability impact, however, is relatively low, as the primary concern is the execution of unauthorized JavaScript.
Risk & Impact Analysis
The real-world risk associated with CVE-2024-34342 is significant. Organizations that utilize react-pdf may inadvertently expose themselves to severe security breaches if the vulnerability is not addressed. The potential for arbitrary code execution means that attackers can gain unauthorized access to sensitive data, leading to data breaches and loss of customer trust.
With the increasing prevalence of PDF-related attacks, the urgency for organizations to remediate this vulnerability cannot be overstated. The high exploitability score further emphasizes the need for immediate action. Organizations should schedule remediation as part of their priority patch cycle to mitigate the risk posed by this vulnerability.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions prior to 7.7.3 and 8.0.2 of react-pdf are affected by this vulnerability. Organizations should ensure they are running updated versions to mitigate the risks associated with this flaw.
Mitigation & Remediation
Organizations should prioritize patching immediately. The fixed versions are 7.7.3 and 8.0.2 of react-pdf. If immediate patching is not possible, disabling the `isEvalSupported` option in PDF.js is recommended as a temporary workaround. Additionally, organizations should implement robust security measures such as input validation and monitoring for abnormal behavior in their applications.
For further guidance on security testing and validation, organizations can explore penetration testing services to ensure their applications are secure.
Detection Guidance
Organizations should monitor for any abnormal behaviors in applications utilizing react-pdf. Key indicators may include unusual JavaScript execution patterns or unexpected interactions with PDF files. Logging PDF processing activities and reviewing them for anomalies can help in early detection of potential exploitation attempts.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2024-34342 highlights the necessity for organizations to rigorously evaluate their dependencies on third-party libraries like react-pdf. As vulnerabilities continue to emerge in widely used libraries, the need for proactive security measures becomes paramount.
Patterns of similar vulnerabilities suggest that security teams should regularly assess their libraries for vulnerabilities and ensure timely updates. Organizations are encouraged to integrate security assessments into their development lifecycle to mitigate risks effectively.
For more insights on security best practices, organizations can explore our guides on vulnerability management and penetration testing methodology to enhance security posture.
Additionally, engaging in red teaming exercises can provide valuable insights into the effectiveness of security measures in place.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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