CVE-2018-1071 Explained : Impact and Mitigation

CVE-2018-1071 is a vulnerability in zsh versions prior to 5.4.2 that allows a local attacker to trigger a denial of service through a specific function.

Understanding CVE-2018-1071

This CVE entry highlights a security flaw in zsh versions before 5.4.2, impacting the hashcmd() function in exec.c.

What is CVE-2018-1071?

The vulnerability in zsh versions prior to 5.4.2 enables a local attacker to exploit the hashcmd() function, leading to a denial of service attack.

The Impact of CVE-2018-1071

The security issue allows an attacker with local system access to disrupt services, potentially causing system unavailability.

Technical Details of CVE-2018-1071

This section delves into the technical aspects of the CVE-2018-1071 vulnerability.

Vulnerability Description

The vulnerability lies in the hashcmd() function within exec.c in zsh versions before 5.4.2, enabling a local attacker to execute a denial of service attack.

Affected Systems and Versions

Product: zsh
Vendor: zsh
Affected Version: 5.4.2

Exploitation Mechanism

The vulnerability can be exploited by a local attacker who has access to the system, leveraging the hashcmd() function to disrupt services.

Mitigation and Prevention

To address CVE-2018-1071, immediate actions and long-term security practices are essential.

Immediate Steps to Take

Update zsh to version 5.4.2 or later to mitigate the vulnerability.
Restrict local access to systems to minimize the risk of exploitation.

Long-Term Security Practices

Regularly monitor and patch software to prevent known vulnerabilities.
Implement least privilege access controls to limit potential attack surfaces.

Patching and Updates

Ensure timely installation of security patches and updates to safeguard systems against known vulnerabilities.