CVE-2017-0904 Information

Description

The private_address_check ruby gem before 0.4.0 is vulnerable to a bypass due to use of Ruby’s Resolv.getaddresses method which is OS-dependent and should not be relied upon for security measures such as when used to blacklist private network addresses to prevent server-side request forgery.

CVSS Vector

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Reference

https://edoverflow.com/2017/ruby-resolv-bug/ https://github.com/jtdowney/private_address_check/commit/58a0d7fe31de339c0117160567a5b33ad82b46af https://github.com/jtdowney/private_address_check/issues/1 https://hackerone.com/reports/287245 https://hackerone.com/reports/287835

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.1