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Advisories

Bytebase 0.12.0 before 1.0.1 Authentication Bypass via GitLab Self-Hosted Login

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Severity
critical
Date
Affecting

  • bytebase >= 0.12.0, < 1.0.1

CWE
  • CWE-290 Authentication Bypass by Spoofing
CVSS
9.3
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Credit
leediay153 from Viettel Post
Description
Bytebase 0.12.0 before 1.0.1 contains an authentication bypass vulnerability that allows unauthenticated attackers to log in as any user. The flaw stems from trusting client-supplied GitLab provider configuration in the POST /api/auth/login/GITLAB_SELF_HOST endpoint. Attackers can set instanceUrl to a server they control that returns an active user with a chosen email. Bytebase then issues session tokens for that principal, letting attackers impersonate existing users including the Owner or create new members.

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