CVE-2022-30351 Explained : Impact and Mitigation

PDFZorro PDFZorro Online r20220428 using TCPDF 6.2.5, despite having workflows claiming to correctly remove redacted information from a supplied PDF file, does not properly sanitize this information in all cases, causing redacted information, including images and text embedded in the PDF file, to be leaked unintentionally. In cases where PDF text objects are present it is possible to copy-paste redacted information into the system clipboard. Once a document is 'locked' and marked for redaction once, all redactions performed after this feature is triggered are vulnerable.

Understanding CVE-2022-30351

PDFZorro PDFZorro Online r20220428 is affected by a vulnerability that allows redacted information contained in PDF files to be leaked unintentionally, posing a risk of sensitive data exposure.

What is CVE-2022-30351?

CVE-2022-30351 relates to a flaw in PDFZorro PDFZorro Online r20220428 using TCPDF 6.2.5, where redacted information is not properly sanitized, leading to potential leakage of sensitive data such as images and text within PDF files.

The Impact of CVE-2022-30351

The vulnerability in PDFZorro Online could result in unauthorized access to redacted information, compromising the confidentiality and integrity of sensitive data present in PDF files.

Technical Details of CVE-2022-30351

Vulnerability Description

The flaw in PDFZorro Online allows redacted information to be inadvertently leaked, enabling users to copy-paste the redacted content into their system clipboard, even after applying redaction features.

Affected Systems and Versions

Vendor and product information are not available as the vulnerability pertains to PDFZorro PDFZorro Online r20220428 using TCPDF 6.2.5.

Exploitation Mechanism

Attackers can exploit this vulnerability by accessing redacted information in PDF files, potentially leading to unauthorized access to sensitive data.

Mitigation and Prevention

Immediate Steps to Take

Users are advised to exercise caution while handling redacted PDF files and avoid sharing sensitive information through documents processed using PDFZorro Online.

Long-Term Security Practices

Employing additional encryption and access controls for sensitive PDF files can help mitigate risks associated with data leakage vulnerabilities like CVE-2022-30351.

Patching and Updates

Users should stay informed about security patches and updates provided by PDFZorro to address the vulnerability and enhance the security of the platform.