CVE-2021-39907 : Vulnerability Insights and Analysis
Learn about CVE-2021-39907, a Medium severity DOS vulnerability in GitLab CE/EE versions 13.7 to 14.4.1. Find details, impact, affected versions, and mitigation steps.
A potential DOS vulnerability was discovered in GitLab CE/EE starting with version 13.7, leading to high CPU usage.
Understanding CVE-2021-39907
This CVE involves a denial of service vulnerability in GitLab versions 13.7 to 14.4.1.
What is CVE-2021-39907?
The vulnerability in GitLab CE/EE versions causes high CPU consumption due to the mishandling of EXIF data in images.
The Impact of CVE-2021-39907
The vulnerability has a CVSSv3.1 base score of 5.3, classified as Medium severity. Key impact factors include:
- Attack Complexity: Low
- Attack Vector: Network
- Availability Impact: Low
- Scope: Unchanged
Technical Details of CVE-2021-39907
This section provides in-depth technical details about the CVE.
Vulnerability Description
The flaw in GitLab versions 13.7 to 14.4.1 triggers high CPU usage due to improper EXIF data processing.
Affected Systems and Versions
- Affected Product: GitLab
- Affected Versions: >=14.4, <14.4.1; >=14.3, <14.3.4; >=13.7, <14.2.6
Exploitation Mechanism
The vulnerability can be exploited remotely with no privileges required, impacting availability significantly.
Mitigation and Prevention
Learn how to address and prevent the CVE.
Immediate Steps to Take
- Update GitLab to versions above 14.4.1, 14.3.4, or 14.2.6.
- Monitor and restrict image uploads that may trigger the vulnerability.
Long-Term Security Practices
- Regularly audit and sanitize uploaded images for malformed EXIF data.
- Educate users on safe image handling practices.
Patching and Updates
GitLab has released patches for the affected versions to address the vulnerability.