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CVE-2025-0993: GitLab CE/EE Denial of Service Vulnerability

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Overview

The CVE-2025-0993 is a critical vulnerability discovered in GitLab CE/EE that affects multiple versions of the software. If exploited, an authenticated attacker could exhaust server resources, causing a denial of service (DoS) condition. As GitLab is widely used for software development and collaboration, this vulnerability could potentially impact a large number of users and organizations.

Vulnerability Summary

CVE ID: CVE-2025-0993
Severity: High (7.5 CVSS Score)
Attack Vector: Network
Privileges Required: Low (Authenticated)
User Interaction: None
Impact: Denial of Service (DoS), potential system compromise, and potential data leakage

Affected Products

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Product | Affected Versions

GitLab CE | versions before 17.10.7
GitLab EE | 17.11 before 17.11.3, 18.0 before 18.0.1

How the Exploit Works

An authenticated attacker can exploit this vulnerability by sending a series of requests designed to consume excessive system resources. This is done by leveraging a flaw in the software’s resource allocation, causing it to allocate more resources than necessary or to fail to properly release resources after use. As a result, the server can become overwhelmed and unable to service legitimate requests, leading to a denial of service.

Conceptual Example Code

Below is a conceptual example of a malicious request that could exploit this vulnerability. In practice, the specifics of the “malicious_payload” would depend on the exact nature of the resource allocation flaw.

POST /api/v4/projects HTTP/1.1
Host: target.example.com
Content-Type: application/json
{ "malicious_payload": "..." }

Please note that the actual exploit would require detailed knowledge of the specific flaw and might involve multiple such requests.

Mitigation Guidance

As soon as possible, affected users should apply the vendor-provided patch to fix this vulnerability. If immediate patching is not feasible, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can provide temporary mitigation. However, these measures are not a substitute for patching and should only be used as a stop-gap measure.

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Disclaimer:

The information and code presented in this article are provided for educational and defensive cybersecurity purposes only. Any conceptual or pseudocode examples are simplified representations intended to raise awareness and promote secure development and system configuration practices.

Do not use this information to attempt unauthorized access or exploit vulnerabilities on systems that you do not own or have explicit permission to test.

Ameeba and its authors do not endorse or condone malicious behavior and are not responsible for misuse of the content. Always follow ethical hacking guidelines, responsible disclosure practices, and local laws.

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