CVE-2023-3900 : What You Need to Know
Learn about CVE-2023-3900 affecting GitLab CE/EE versions 16.1 and 16.2. Issue involves improper input validation leading to a DoS attack on merge requests page.
An issue has been discovered in GitLab CE/EE affecting versions starting from 16.1 before 16.1.3 and from 16.2 before 16.2.2. This vulnerability involves improper input validation that could result in a Denial of Service when an invalid 'start_sha' value is provided on the merge requests page, causing the Changes tab not to load.
Understanding CVE-2023-3900
This section provides an overview and impact analysis of the CVE-2023-3900 vulnerability in GitLab.
What is CVE-2023-3900?
CVE-2023-3900 is a vulnerability in GitLab CE/EE that affects versions 16.1 and 16.2, potentially leading to a Denial of Service due to improper input validation.
The Impact of CVE-2023-3900
The vulnerability could be exploited by malicious actors to disrupt the normal functioning of the Changes tab in the merge requests page, thereby affecting the availability of the service.
Technical Details of CVE-2023-3900
Explore the technical aspects of the CVE-2023-3900 vulnerability to understand its scope and implications.
Vulnerability Description
The vulnerability stems from improper input validation in GitLab, specifically related to the processing of the 'start_sha' value on the merge requests page, leading to a denial of service.
Affected Systems and Versions
GitLab versions starting from 16.1 before 16.1.3 and versions starting from 16.2 before 16.2.2 are impacted by this vulnerability.
Exploitation Mechanism
By providing an invalid 'start_sha' value on the merge requests page, attackers can trigger the vulnerability, causing the Changes tab not to load and resulting in a Denial of Service.
Mitigation and Prevention
Learn about the measures that can be taken to address and prevent CVE-2023-3900 in GitLab CE/EE.
Immediate Steps to Take
Users are advised to upgrade to GitLab version 16.2.2, 16.1.3, or newer to mitigate the vulnerability and prevent exploitation.
Long-Term Security Practices
Implement secure coding practices, conduct regular security assessments, and stay informed about security updates to safeguard against similar vulnerabilities in the future.
Patching and Updates
Stay updated with security advisories from GitLab and promptly apply patches or upgrades to ensure the latest security protections are in place.