CVE-2021-22203 : Security Advisory and Response

An overview of a vulnerability discovered in GitLab with the potential to impact various versions of the software.

Understanding CVE-2021-22203

Insights into the vulnerability, its impact, technical details, and mitigation strategies.

What is CVE-2021-22203?

GitLab CE/EE versions from 13.7.9 to 13.10.1 are affected by an issue that allows attackers to read arbitrary files on the server through a specially crafted Wiki page.

The Impact of CVE-2021-22203

The vulnerability has a CVSS v3.1 base score of 7.5 (High), with a high impact on confidentiality and a low impact on integrity. The attack complexity is high, requiring no user privileges, and can be exploited over the network.

Technical Details of CVE-2021-22203

A deeper dive into the specifics of the vulnerability.

Vulnerability Description

A flaw in GitLab versions starting from 13.7.9 to 13.10.1 allows unauthorized access to sensitive server files via a specially crafted Wiki page.

Affected Systems and Versions

GitLab versions >=13.7.9 and <13.10.1, >=13.9 and <13.9.5, >=13.10 and <13.10.1 are susceptible to this vulnerability.

Exploitation Mechanism

Attackers can exploit this issue by manipulating Wiki pages to access confidential information stored on the server.

Mitigation and Prevention

Guidelines for addressing the CVE-2021-22203 vulnerability.

Immediate Steps to Take

Organizations using affected GitLab versions should apply the necessary patches promptly and monitor for any signs of exploitation.

Long-Term Security Practices

Regular security assessments, employee training, and implementing access controls can help prevent similar vulnerabilities in the future.

Patching and Updates

Ensure that GitLab is updated to versions beyond the vulnerable range to mitigate the risk of exploitation.