Vulnerability identifier: #VU31150

Vulnerability risk: Low

CVSSv3.1: 5.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:P/RL:O/RC:C]

CVE-ID: CVE-2019-3778

CWE-ID: CWE-601

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Spring Security OAuth
Server applications / Frameworks for developing and running applications

Vendor: Pivotal

Description

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

Spring Security OAuth, versions 2.3 prior to 2.3.5, and 2.2 prior to 2.2.4, and 2.1 prior to 2.1.4, and 2.0 prior to 2.0.17, and older unsupported versions could be susceptible to an open redirector attack that can leak an authorization code. A malicious user or attacker can craft a request to the authorization endpoint using the authorization code grant type, and specify a manipulated redirection URI via the "redirect_uri" parameter. This can cause the authorization server to redirect the resource owner user-agent to a URI under the control of the attacker with the leaked authorization code. This vulnerability exposes applications that meet all of the following requirements: Act in the role of an Authorization Server (e.g. @EnableAuthorizationServer) and uses the DefaultRedirectResolver in the AuthorizationEndpoint. This vulnerability does not expose applications that: Act in the role of an Authorization Server and uses a different RedirectResolver implementation other than DefaultRedirectResolver, act in the role of a Resource Server only (e.g. @EnableResourceServer), act in the role of a Client only (e.g. @EnableOAuthClient).

Mitigation
Install update from vendor's website.

Vulnerable software versions

Spring Security OAuth: 2.3.0 - 2.3.4

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External links
http://packetstormsecurity.com/files/153299/Spring-Security-OAuth-2.3-Open-Redirection.html
http://www.securityfocus.com/bid/107153
http://pivotal.io/security/cve-2019-3778

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.