Authentication bypass in Cloud Foundry

1) Improper Authentication

EUVDB-ID: #VU19130

Risk: High

CVSSv3.1: 7.1 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-6659

CWE-ID: CWE-287 - Improper Authentication

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to improper authentication. A remote attacker can gain privileges by accessing UAA logs and subsequently running a specially crafted application that interacts with a configured SAML provider.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cloud Foundry UAA: 1.0.0 - 3.9.2

Cloud Foundry: 68 - 247

Bosh Release for the UAA: 2 - 23

External links

http://www.cloudfoundry.org/cve-2016-6659/
http://github.com/cloudfoundry-attic/cf-release/releases/tag/v248
http://github.com/cloudfoundry/uaa/releases/tag/3.9.3
http://github.com/cloudfoundry/uaa/releases/tag/3.6.5
http://github.com/cloudfoundry/uaa/releases/tag/2.7.4.12
http://github.com/cloudfoundry/uaa-release/releases/tag/v24
http://github.com/cloudfoundry/uaa-release/releases/tag/v13.9

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.