CVE-2017-0904

HIGH

Private_address_check <0.4.0 - SSRF

Title source: llm

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.

References (5)

[Issue Tracking, Third Party Advisory] https://edoverflow.com/2017/ruby-resolv-bug/

[Third Party Advisory] https://github.com/jtdowney/private_address_check/commit/58a0d7fe31de339c0117160567a5b33ad82b46af

View Writeup ZIP pw:eip

[Issue Tracking, Third Party Advisory] https://github.com/jtdowney/private_address_check/issues/1

[Issue Tracking, Mitigation, Patch, Third Party Advisory] https://hackerone.com/reports/287245

[Permissions Required, Third Party Advisory] https://hackerone.com/reports/287835

Scores

CVSS v3 8.1

EPSS 0.0086

EPSS Percentile 74.8%

Attack Vector NETWORK

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

Classification

CWE

CWE-242 CWE-755

Status draft

Affected Products (2)

private_address_check_project/private_address_check < 0.4.0

rubygems/private_address_check < 0.4.0RubyGems

Timeline

Published Nov 13, 2017

Tracked Since Feb 18, 2026