CVE-2021-43777 Vulnerability in Redash OAuth2 flows due to misuse of state field (should be a nonce)
Attackers can exploit improper OAuth state handling to redirect users to malicious sites, potentially leading to account takeover if Google Login is enabled.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-43777?
CVE-2021-43777 is a medium-severity vulnerability in getredash redash, published on 23 Nov 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Redash is a package for data visualization and sharing. In Redash version 10.0 and prior, the implementation of Google Login (via OAuth) incorrectly uses the `state` parameter to pass the next URL to redirect the user to after login. The `state` parameter should be used for a Cross-Site Request Forgery (CSRF) token, not a static and easily predicted value. This vulnerability does not affect users who do not use Google Login for their instance of Redash. A patch in the `master` and `release/10.x.x` branches addresses this by replacing `Flask-Oauthlib` with `Authlib` which automatically provides and validates a CSRF token for the state variable. The new implementation stores the next URL on the user session object. As a workaround, one may disable Google Login to mitigate the vulnerability.
Which versions are affected by CVE-2021-43777?
It affects 1 product.
Products include Redash Redash.
How do I fix CVE-2021-43777?
No fix has been published for CVE-2021-43777 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-43777 being exploited?
There is no known exploitation of CVE-2021-43777 in the wild and no public exploit code.
Other vulnerabilities in getredash redash
Sources
Also known as GHSA-vhc7-w7r8-8m34.