Vulnerability in Redash OAuth2 flows due to misuse of state field (should be a nonce)
CVE-2021-43777

6.8MEDIUM

Key Information:

Vendor

Getredash

Status
Redash
Vendor
CVE Published:
24 November 2021

What is CVE-2021-43777?

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.

Affected Version(s)

redash <= 10.0

References

https://github.com/getredash/redash/security/advisories/G...
x_refsource_CONFIRM
https://github.com/getredash/redash/commit/da696ff7f84787...
x_refsource_MISC

CVSS V3.1

Score:
6.8
Severity:
MEDIUM
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.