CVE-2019-10743 : Security Advisory and Response

A vulnerability in all versions of archiver allows attackers to exploit the "unarchive" functions, leading to a Zip Slip attack. This can result in arbitrary code execution.

Understanding CVE-2019-10743

This CVE involves a security issue in archiver that enables attackers to manipulate zip archives to execute malicious code.

What is CVE-2019-10743?

The vulnerability in archiver's unarchive functions permits a Zip Slip attack, where specially crafted zip archives with path traversal filenames can lead to code execution outside the intended directory.

The Impact of CVE-2019-10743

The vulnerability can allow attackers to overwrite executable or configuration files with malicious code, potentially leading to arbitrary code execution.

Technical Details of CVE-2019-10743

This section provides more in-depth technical insights into the vulnerability.

Vulnerability Description

The flaw in archiver's unarchive functions allows for a Zip Slip attack, enabling attackers to break out of the target folder by manipulating filenames in a malicious zip archive.

Affected Systems and Versions

Product: archiver
Vendor: n/a
Versions: All versions

Exploitation Mechanism

Attackers exploit the vulnerability by crafting zip archives with path traversal filenames. When extracted, the malicious filename combines with the target directory, allowing the code to execute outside the intended folder.

Mitigation and Prevention

To address and prevent the exploitation of CVE-2019-10743, follow these steps:

Immediate Steps to Take

Update archiver to the latest version that includes a patch for the Zip Slip vulnerability.
Avoid extracting zip archives from untrusted sources.

Long-Term Security Practices

Regularly update software and libraries to patch known vulnerabilities.
Implement file extraction mechanisms that prevent path traversal attacks.

Patching and Updates

Stay informed about security updates for archiver and apply patches promptly to mitigate the Zip Slip vulnerability.