CVE-2019-20795 : What You Need to Know

A use-after-free vulnerability in the get_netnsid_from_name function within iproute2 before version 5.1.0 has been identified. This CVE may have limited security implications based on specific user configurations.

Understanding CVE-2019-20795

This CVE involves a use-after-free vulnerability in the iproute2 package before version 5.1.0.

What is CVE-2019-20795?

The vulnerability exists in the get_netnsid_from_name function within iproute2, potentially impacting systems using specific configurations involving setuid.

The Impact of CVE-2019-20795

The security relevance of this vulnerability may be restricted to scenarios where setuid is utilized as a configuration option for end users, rather than being enabled by default. Exploitability may be hindered by factors such as the C library configuration.

Technical Details of CVE-2019-20795

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The use-after-free vulnerability in the get_netnsid_from_name function within iproute2 before version 5.1.0.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions affected: Not applicable

Exploitation Mechanism

The exploitability of this vulnerability may be impeded by factors such as the configuration of the C library.

Mitigation and Prevention

Protecting systems from CVE-2019-20795 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update iproute2 to version 5.1.0 or newer to mitigate the vulnerability.
Review and adjust setuid configurations if applicable.

Long-Term Security Practices

Regularly update software and libraries to prevent known vulnerabilities.
Implement least privilege principles to limit the impact of potential exploits.
Monitor security advisories from relevant vendors and communities.
Conduct regular security assessments and audits.

Patching and Updates

Ensure timely patching of software and libraries to address known vulnerabilities.