CVE-2019-12957 : Vulnerability Insights and Analysis

Xpdf 4.01.01 is affected by a buffer over-read vulnerability in the convertToType1 function, potentially leading to Denial of Service attacks or information leakage when processing manipulated PDF documents.

Understanding CVE-2019-12957

This CVE involves a security issue in Xpdf 4.01.01 that can be exploited by attackers through crafted PDF files.

What is CVE-2019-12957?

The vulnerability exists in the convertToType1 function of Xpdf 4.01.01
Attackers can trigger a buffer over-read by exceeding the charset array bounds
Exploitation occurs when a manipulated PDF document is processed by the pdftops tool

The Impact of CVE-2019-12957

Potential outcomes include Denial of Service attacks, information leakage, and other unspecified impacts

Technical Details of CVE-2019-12957

Xpdf 4.01.01 is susceptible to a buffer over-read vulnerability that can be exploited by attackers.

Vulnerability Description

Located in the convertToType1 function of Xpdf 4.01.01
Triggered when the index number exceeds the charset array bounds

Affected Systems and Versions

Xpdf 4.01.01

Exploitation Mechanism

Attackers exploit the vulnerability by providing a manipulated PDF document to the pdftops tool

Mitigation and Prevention

Steps to address and prevent the CVE-2019-12957 vulnerability.

Immediate Steps to Take

Update Xpdf to the latest version
Avoid opening PDF files from untrusted sources

Long-Term Security Practices

Regularly update software and security patches
Implement network and system monitoring for unusual activities

Patching and Updates

Apply patches and updates provided by Xpdf to address the vulnerability