CVE-2019-9589 : Exploit Details and Defense Strategies

Xpdf version 4.01 contains a vulnerability in PSOutputDev::setupResources() function, leading to a NULL pointer dereference. This flaw can be exploited by sending a specially crafted PDF file to the pdftops binary, potentially resulting in a Denial of Service situation or other unspecified impacts.

Understanding CVE-2019-9589

Xpdf version 4.01 vulnerability with potential Denial of Service consequences.

What is CVE-2019-9589?

CVE-2019-9589 is a NULL pointer dereference vulnerability in the PSOutputDev::setupResources() function within Xpdf version 4.01. Exploiting this flaw involves sending a malicious PDF file to the pdftops binary.

The Impact of CVE-2019-9589

The vulnerability can lead to a Denial of Service situation, causing a segmentation fault.
It may result in other unspecified impacts on the affected system.

Technical Details of CVE-2019-9589

Xpdf version 4.01 vulnerability technical insights.

Vulnerability Description

The vulnerability exists in the PSOutputDev::setupResources() function in Xpdf version 4.01, triggered by a crafted PDF file sent to the pdftops binary.

Affected Systems and Versions

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

Exploitation Mechanism

The vulnerability can be exploited by sending a specially crafted PDF file to the pdftops binary, potentially leading to a Denial of Service situation.

Mitigation and Prevention

Protective measures against CVE-2019-9589.

Immediate Steps to Take

Apply vendor-supplied patches or updates promptly.
Avoid opening PDF files from untrusted or unknown sources.
Monitor vendor communications for security advisories.

Long-Term Security Practices

Regularly update software and applications to the latest versions.
Implement network and system security best practices.
Conduct regular security assessments and audits.

Patching and Updates

Ensure Xpdf software is updated to a patched version that addresses the vulnerability.