Vulnerability identifier: #VU8580

Vulnerability risk: Low

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2015-7577

CWE-ID: CWE-264

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Ruby on Rails
Universal components / Libraries / Scripting languages

Vendor: Rails

Description
The vulnerability allows a remote attacker to bypass certain security restrictions.

activerecord/lib/active_record/nested_attributes.rb in Active Record in Ruby on Rails 3.1.x and 3.2.x before 3.2.22.1, 4.0.x and 4.1.x before 4.1.14.1, 4.2.x before 4.2.5.1, and 5.x before 5.0.0.beta1.1 does not properly implement a certain destroy option, which allows remote attackers to bypass intended change restrictions by leveraging use of the nested attributes feature.

Mitigation
Update to version 3.2.22.1, 4.1.14.1 or 4.2.5.1.

Vulnerable software versions

Ruby on Rails: 4.2.0 - 4.2.5 rc2, 4.1.0 - 4.1.14 rc2, 4.0.0 - 4.0.13 rc1, 3.2.0 - 3.2.22, 3.1.0 - 3.1.12

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External links
http:
Rails 3.2.22.1
Rails 4.1.14.1
Rails 4.2.5.1

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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.