Denial of Service Vulnerability in GitLab RefMatcher Affects All Prior Versions
CVE-2024-2800

7.5HIGH

Key Information:

Vendor
Gitlab
Status
Gitlab
Vendor
CVE Published:
8 August 2024

Badges

👾 Exploit Exists🟡 Public PoC

Summary

The vulnerability in GitLab's RefMatcher arises from a ReDoS flaw when matching branch names with wildcards. This issue affects multiple versions of GitLab EE and CE, enabling potential denial of service attacks due to excessive Regex backtracking. Attackers could exploit this vulnerability to degrade performance or cause service disruptions, thereby impacting users' ability to manage version control effectively. Organizations using affected versions must prioritize addressing this flaw to maintain system integrity and protect against service interruptions.

Affected Version(s)

GitLab 11.3 < 17.0.6

GitLab 17.1 < 17.1.4

GitLab 17.2 < 17.2.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2024-2800 - Proof of Concept

References

https://gitlab.com/gitlab-org/gitlab/-/issues/451293
issue-trackingpermissions-required
https://hackerone.com/reports/2416332
technical-descriptionexploitpermissions-required

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Thanks [joaxcar](https://hackerone.com/joaxcar) for reporting this vulnerability through our HackerOne bug bounty program
.