CVE-2020-7450 : What You Need to Know

In FreeBSD 12.1-STABLE before r357213, 12.1-RELEASE before 12.1-RELEASE-p2, 12.0-RELEASE before 12.0-RELEASE-p13, 11.3-STABLE before r357214, and 11.3-RELEASE before 11.3-RELEASE-p6, URL handling in libfetch with URLs containing username and/or password components is vulnerable to a heap buffer overflow allowing program misbehavior or malicious code execution.

Understanding CVE-2020-7450

This CVE identifies a heap-based buffer overflow vulnerability in FreeBSD versions mentioned above.

What is CVE-2020-7450?

CVE-2020-7450 is a vulnerability in the URL handling component of libfetch in FreeBSD, which could lead to a heap buffer overflow.

The Impact of CVE-2020-7450

The vulnerability could allow attackers to execute malicious code or cause program misbehavior on affected systems.

Technical Details of CVE-2020-7450

This section provides more technical insights into the CVE.

Vulnerability Description

The vulnerability is a heap-based buffer overflow in the URL handling of libfetch in specific FreeBSD versions.

Affected Systems and Versions

FreeBSD 12.1-STABLE before r357213
FreeBSD 12.1-RELEASE before 12.1-RELEASE-p2
FreeBSD 12.0-RELEASE before 12.0-RELEASE-p13
FreeBSD 11.3-STABLE before r357214
FreeBSD 11.3-RELEASE before 11.3-RELEASE-p6

Exploitation Mechanism

The vulnerability occurs when handling URLs with username and/or password components, leading to a heap buffer overflow.

Mitigation and Prevention

Protecting systems from the CVE and preventing exploitation is crucial.

Immediate Steps to Take

Apply the necessary patches provided by FreeBSD promptly.
Monitor official security advisories for updates and follow recommended actions.

Long-Term Security Practices

Regularly update and patch FreeBSD systems to mitigate known vulnerabilities.
Implement network security measures to prevent unauthorized access.

Patching and Updates

Ensure all affected FreeBSD versions are updated with the latest security patches to address the vulnerability.