CVE-2019-1000019 : Exploit Details and Defense Strategies

CVE-2019-1000019 was assigned on January 22, 2019, and made public on February 4, 2019. The vulnerability affects libarchive versions starting from commit bf9aec176c6748f0ee7a678c5f9f9555b9a757c1 (release v3.0.2 onwards) and involves an out-of-bounds read vulnerability in 7zip decompression.

Understanding CVE-2019-1000019

This section provides insights into the nature and impact of the CVE-2019-1000019 vulnerability.

What is CVE-2019-1000019?

CVE-2019-1000019 is a vulnerability in libarchive that can lead to a denial of service by causing a crash when a specially crafted 7zip file is opened.

The Impact of CVE-2019-1000019

The vulnerability in libarchive could potentially result in a denial of service if exploited. An attacker could craft a malicious 7zip file to trigger a crash, impacting the availability of the system.

Technical Details of CVE-2019-1000019

Explore the technical aspects of the CVE-2019-1000019 vulnerability.

Vulnerability Description

The vulnerability exists in the archive_read_support_format_7zip.c, specifically in the header_bytes() function, allowing an out-of-bounds read during 7zip decompression.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions: All versions starting from commit bf9aec176c6748f0ee7a678c5f9f9555b9a757c1 (release v3.0.2 onwards)

Exploitation Mechanism

The vulnerability can be exploited by enticing a user to open a specially crafted 7zip file, triggering the out-of-bounds read vulnerability.

Mitigation and Prevention

Learn how to mitigate the risks associated with CVE-2019-1000019.

Immediate Steps to Take

Update libarchive to the latest patched version to address the vulnerability.
Avoid opening 7zip files from untrusted or unknown sources.

Long-Term Security Practices

Regularly update software and libraries to patch known vulnerabilities.
Implement file type and content validation mechanisms to prevent malicious file execution.

Patching and Updates

Ensure timely application of security patches and updates to mitigate the risk of exploitation.