SigNoz before 0.134.0 contains an open redirect vulnerability in the SSO authentication flow that allows unauthenticated attackers to steal session tokens from any user on instances configured with Google OAuth, SAML, or OIDC. Attackers can call the unauthenticated sessions context endpoint with a ref parameter pointing to an attacker-controlled host, deliver the resulting crafted login URL to a victim, and receive the victim's access and refresh tokens when they complete SSO authentication.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
Present
Additional conditions required
Privileges Required
None
No privileges needed
User Interaction
Passive
Minimal interaction
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products
signoz:signoz
References 5
https://github.com/SigNoz/signoz/commit/253ca7dd7eb4f7a32a694c249eb0d5d0804d5619
disclosure@vulncheck.com
https://github.com/SigNoz/signoz/issues/11746
disclosure@vulncheck.com
https://github.com/SigNoz/signoz/pull/12172
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/signoz-sso-oauth-state-manipulation-sessio…
disclosure@vulncheck.com
https://github.com/SigNoz/signoz/releases/tag/v0.134.0
Release Notes