CVE-2019-9877 : Vulnerability Insights and Analysis

Xpdf 4.01's TextPage::findGaps() function contains a vulnerability allowing invalid memory access, exploitable via crafted PDF files.

Understanding CVE-2019-9877

This CVE involves a vulnerability in Xpdf 4.01 that can lead to Denial of Service or other impacts when exploited.

What is CVE-2019-9877?

The TextPage::findGaps() function in Xpdf 4.01, specifically in the file TextOutputDev.c, contains a vulnerability related to invalid memory access. An attacker can exploit this by sending a crafted PDF file through the pdftops binary.

The Impact of CVE-2019-9877

Exploiting this vulnerability could result in a Denial of Service (Segmentation fault) or potentially have other unspecified impacts.

Technical Details of CVE-2019-9877

Xpdf 4.01's vulnerability in the TextPage::findGaps() function allows for invalid memory access.

Vulnerability Description

The vulnerability in Xpdf 4.01's TextPage::findGaps() function permits attackers to trigger Denial of Service or other unspecified impacts by sending a crafted PDF file.

Affected Systems and Versions

Product: Xpdf 4.01
Vendor: N/A
Version: N/A

Exploitation Mechanism

Attackers can exploit this vulnerability by sending a deliberately crafted PDF file through the pdftops binary.

Mitigation and Prevention

Steps to address and prevent the CVE-2019-9877 vulnerability.

Immediate Steps to Take

Apply vendor patches or updates promptly.
Avoid opening PDF files from untrusted sources.
Implement proper file and network security measures.

Long-Term Security Practices

Regularly update software and applications.
Conduct security audits and vulnerability assessments.
Educate users on safe browsing and file handling practices.

Patching and Updates

Check for patches or updates from Xpdf or relevant vendors.
Apply security patches as soon as they are released to mitigate the vulnerability.