CVE-2017-8283 : Security Advisory and Response

In dpkg versions 1.3.0 to 1.18.23, a vulnerability exists in dpkg-source that allows for the use of a non-GNU patch program. This flaw lacks safeguards against blank-indented diff hunks, enabling attackers to execute directory traversal attacks through a customized Debian source package.

Understanding CVE-2017-8283

This CVE entry highlights a security issue in the dpkg package management system.

What is CVE-2017-8283?

dpkg-source in dpkg 1.3.0 through 1.18.23 can utilize a non-GNU patch program, making it susceptible to remote attacks via crafted Debian source packages.

The Impact of CVE-2017-8283

The vulnerability allows remote attackers to conduct directory traversal attacks, potentially compromising the integrity and security of the system.

Technical Details of CVE-2017-8283

This section delves into the specifics of the vulnerability.

Vulnerability Description

The flaw in dpkg-source lacks protection against blank-indented diff hunks, facilitating directory traversal attacks through manipulated Debian source packages.

Affected Systems and Versions

Affected versions: 1.3.0 to 1.18.23 of dpkg
Systems using dpkg within this version range are vulnerable to exploitation

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting malicious Debian source packages and utilizing dpkg-source on vulnerable systems.

Mitigation and Prevention

Protecting systems from CVE-2017-8283 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update dpkg to a patched version to mitigate the vulnerability
Monitor for any suspicious activities related to directory traversal

Long-Term Security Practices

Implement strict source package validation procedures
Regularly update and patch software to prevent known vulnerabilities

Patching and Updates

Apply patches provided by the dpkg maintainers to address the vulnerability