Detections
Analytics
CVE-2019-11881
medium
Description
A vulnerability exists in Rancher before 2.2.4 in the login component, where the errorMsg parameter can be tampered to display arbitrary content, filtering tags but not special characters or symbols. There's no other limitation of the message, allowing malicious users to lure legitimate users to visit phishing sites with scare tactics, e.g., displaying a "This version of Rancher is outdated, please visit https://malicious.rancher.site/upgrading" message.
References
https://github.com/rancher/rancher/issues/20216
https://github.com/rancher/rancher/commit/e59adbc7565251919d84d6e353421104be8da06e
https://github.com/rancher/rancher/blob/v2.2.4/pkg/auth/providers/saml/saml_client.go#L282