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)
Core 5
Core References
Issue Tracking, Mitigation, Patch, Third Party Advisory x_refsource_misc
https://hackerone.com/reports/287245
Issue Tracking, Third Party Advisory x_refsource_misc
https://edoverflow.com/2017/ruby-resolv-bug/
Issue Tracking, Third Party Advisory x_refsource_confirm
https://github.com/jtdowney/private_address_check/issues/1
Permissions Required, Third Party Advisory x_refsource_misc
https://hackerone.com/reports/287835
Third Party Advisory x_refsource_confirm
https://github.com/jtdowney/private_address_check/commit/58a0d7fe31de339c0117160567a5b33ad82b46af
Scores
CVSS v3
8.1
EPSS
0.0086
EPSS Percentile
75.2%
Attack Vector
NETWORK
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Details
CWE
CWE-242
CWE-755
Status
published
Products (3)
jtdowney/private_address_check ruby gem
Versions before 0.4.0
private_address_check_project/private_address_check
< 0.4.0
rubygems/private_address_check
0 - 0.4.0RubyGems
Published
Nov 13, 2017
Tracked Since
Feb 18, 2026