#VU18660 Insufficient verification of data authenticity in Spring Security OAuth - CVE-2019-11269

Vulnerability identifier: #VU18660

Vulnerability risk: Medium

CVSSv4.0: 2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/U:Green]

CVE-ID: CVE-2019-11269

CWE-ID: CWE-345

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 attacker to redirect victims to arbitrary URL.

The vulnerability exists due to the application relies on the URL passed via the "redirect_uri" parameter. A remote attacker can create a specially crafted link that once clicked will cause the authorization server to redirect the resource owner user-agent to a URI under the control of the attacker after successful authentication. As a result the attacker can gain authorization code and bypass OAuth authentication.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Spring Security OAuth: 2.0.0 - 2.3.4

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External links
https://pivotal.io/security/cve-2019-11269

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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.