New Security Vulnerability Affects Thousands of GitLab Instances

Scientists have disclosed aspects of a now-patched security vulnerability in GitLab, an open-supply DevOps program, that could likely enable a remote, unauthenticated attacker to get better user-linked facts.

Tracked as CVE-2021-4191 (CVSS rating: 5.3), the medium-severity flaw influences all variations of GitLab Neighborhood Version and Enterprise Version starting from 13. and all versions starting off from 14.4 and prior to 14.8.

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Credited with exploring and reporting the flaw is Jake Baines, a senior security researcher at Rapid7. Following liable disclosure on November 18, 2021, patches were being released as section of GitLab critical security releases 14.8.2, 14.7.4, and 14.6.5 delivered on February 25, 2022.

“The vulnerability is the final result of a missing authentication look at when executing specified GitLab GraphQL API queries,” Baines stated in a report revealed Thursday. “A remote, unauthenticated attacker can use this vulnerability to collect registered GitLab usernames, names, and email addresses.”

Prosperous exploitation of the API information leak could allow malicious actors to enumerate and compile lists of reputable usernames belonging to a focus on that can then be utilized as a stepping stone to perform brute-force attacks, together with password guessing, password spraying, and credential stuffing.

“The info leak also likely enables an attacker to generate a new username wordlist based on GitLab installations — not just from gitlab.com but also from the other 50,000 GitLab cases that can be achieved from the internet,” Baines stated.

In addition to CVE-2021-4191, the patch also addresses six other security flaws, a person of which is a critical issue (CVE-2022-0735, CVSS rating: 9.6) that allows an unauthorized attacker to siphon the runner registration tokens utilised to authenticate and authorize CI/CD work hosted on GitLab situations.

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