CVE-2019-1000020 : What You Need to Know

A vulnerability in libarchive starting from commit 5a98dcf8a86364b3c2c469c85b93647dfb139961 can lead to a denial-of-service scenario due to an infinite loop in the ISO9660 parser.

Understanding CVE-2019-1000020

This CVE involves a vulnerability in libarchive that can result in a denial-of-service situation.

What is CVE-2019-1000020?

The vulnerability exists in libarchive from commit 5a98dcf8a86364b3c2c469c85b93647dfb139961 onwards.
It involves an infinite loop in the ISO9660 parser, specifically in archive_read_support_format_iso9660.c.
Exploiting this vulnerability requires the victim to open a specially crafted ISO9660 file.

The Impact of CVE-2019-1000020

The vulnerability is categorized as CWE-835, leading to a denial-of-service (DoS) scenario due to the program getting stuck in an infinite loop.

Technical Details of CVE-2019-1000020

This section provides technical details about the vulnerability.

Vulnerability Description

The vulnerability in libarchive can result in a denial-of-service scenario due to an infinite loop in the ISO9660 parser.

Affected Systems and Versions

Product: n/a
Vendor: n/a
Versions affected: From version v2.8.0 onwards

Exploitation Mechanism

Exploiting this vulnerability requires the victim to open a specially crafted ISO9660 file.

Mitigation and Prevention

Here are the steps to mitigate and prevent exploitation of CVE-2019-1000020.

Immediate Steps to Take

Update libarchive to a patched version if available.
Avoid opening untrusted ISO9660 files.

Long-Term Security Practices

Regularly update software and libraries to the latest versions.
Implement file validation checks to detect malicious ISO9660 files.

Patching and Updates

Apply patches provided by the vendor to address the vulnerability.