Vulnerability identifier: #VU35950

Vulnerability risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2015-9284

CWE-ID: CWE-352

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
OmniAuth
Client/Desktop applications / Other client software

Vendor: OmniAuth

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

The request phase of the OmniAuth Ruby gem (1.9.1 and earlier) is vulnerable to Cross-Site Request Forgery when used as part of the Ruby on Rails framework, allowing accounts to be connected without user intent, user interaction, or feedback to the user. This permits a secondary account to be able to sign into the web application as the primary account.

Mitigation
Install update from vendor's website.

Vulnerable software versions

OmniAuth: All versions

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External links
http://github.com/omniauth/omniauth/pull/809
http://github.com/omniauth/omniauth/wiki/Resolving-CVE-2015-9284
http://github.com/omniauth/omniauth-rails/pull/1
http://www.openwall.com/lists/oss-security/2015/05/26/11

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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.