CVE-2020-28928 : Security Advisory and Response

In musl libc through 1.2.1, wcsnrtombs mishandles particular combinations of destination buffer size and source character limit, leading to a buffer overflow.

Understanding CVE-2020-28928

This CVE involves a vulnerability in musl libc that can result in an invalid write access due to mishandling buffer sizes and character limits.

What is CVE-2020-28928?

CVE-2020-28928 is a security vulnerability in musl libc versions up to 1.2.1 that allows for a buffer overflow through specific combinations of buffer size and character limits.

The Impact of CVE-2020-28928

The vulnerability can be exploited to trigger an invalid write access, potentially leading to a security breach or system compromise.

Technical Details of CVE-2020-28928

This section provides more in-depth technical information about the CVE.

Vulnerability Description

The vulnerability in musl libc through version 1.2.1 arises from the mishandling of certain combinations of destination buffer size and source character limit, resulting in a buffer overflow.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions affected: All versions up to 1.2.1

Exploitation Mechanism

The vulnerability can be exploited by manipulating specific combinations of buffer sizes and character limits to trigger a buffer overflow.

Mitigation and Prevention

Protecting systems from CVE-2020-28928 requires immediate action and long-term security measures.

Immediate Steps to Take

Apply patches or updates provided by the vendor promptly.
Monitor security advisories for any new information or updates related to the vulnerability.

Long-Term Security Practices

Regularly update software and libraries to ensure the latest security patches are in place.
Conduct security assessments and audits to identify and address vulnerabilities proactively.

Patching and Updates

Check for patches or updates from musl libc or relevant software vendors to address the vulnerability.