CVE-2021-22223 : Security Advisory and Response

A detailed overview of CVE-2021-22223, a client-side code injection vulnerability in GitLab affecting certain versions.

Understanding CVE-2021-22223

This section provides insights into the nature and impact of the CVE-2021-22223 vulnerability.

What is CVE-2021-22223?

The vulnerability allows for client-side code injection through a specially crafted feature flag name in GitLab CE/EE versions starting from 11.9.

The Impact of CVE-2021-22223

By manipulating feature flag names, attackers can initiate PUT requests on behalf of other users by deceiving them into clicking on a link.

Technical Details of CVE-2021-22223

Explore the technical aspects of the CVE-2021-22223 vulnerability to understand its implications further.

Vulnerability Description

The vulnerability stems from improper neutralization of input during web page generation ('cross-site scripting') in GitLab.

Affected Systems and Versions

GitLab versions ranging from >=11.9 to <13.11.6, >=13.12 to <13.12.6, and >=14.0 to <14.0.2 are affected.

Exploitation Mechanism

Attackers can exploit this vulnerability by leveraging a specially crafted feature flag name to initiate PUT requests through user interaction.

Mitigation and Prevention

Learn about the steps to mitigate the risks posed by CVE-2021-22223 and enhance your system's security.

Immediate Steps to Take

Users are advised to update their GitLab instances to non-vulnerable versions and exercise caution while interacting with links.

Long-Term Security Practices

Adopting secure coding practices, conducting regular security assessments, and fostering a security-conscious culture within the organization can bolster defense against such vulnerabilities.

Patching and Updates

Stay vigilant for security updates released by GitLab and promptly apply patches to address known vulnerabilities and enhance system security.