CVE-2021-22119: Denial-of-Service (DoS) attack via initiation of Authorization Request in Spring Security OAuth 2.0 Client Web and WebFlux Application
Severity
Critical
Vendor
Spring by VMware
Description
Spring Security versions 5.5.x prior to 5.5.1, 5.4.x prior to 5.4.7, 5.3.x prior to 5.3.10 and 5.2.x prior to 5.2.11 are susceptible to a Denial-of-Service (DoS) attack via the initiation of the Authorization Request in an OAuth 2.0 Client Web and WebFlux application. A malicious user or attacker can send multiple requests initiating the Authorization Request for the Authorization Code Grant, which has the potential of exhausting system resources using a single session or multiple sessions. This vulnerability exposes OAuth 2.0 Client applications that use HttpSessionOAuth2AuthorizationRequestRepository (Servlet) and WebSessionOAuth2ServerAuthorizationRequestRepository (Reactive).
Affected VMware Products and Versions
Severity is critical unless otherwise noted.
-
Spring Security
- 5.5.x prior to 5.5.1
- 5.4.x prior to 5.4.7
- 5.3.x prior to 5.3.10
- 5.2.x prior to 5.2.11
Mitigation
Users of affected versions should upgrade to the following versions:
-
Spring Security
- 5.5.1
- 5.4.7
- 5.3.10
- 5.2.11
Credit
This issue was identified and responsibly reported by Craig Andrews (github.com/candrews).
References
History
2021-06-28: Initial vulnerability report published.