CVE-2017-0904

Name: CVE-2017-0904
Creator: NVD / NIST
Published: 2017-11-13T17:29:00.347+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 2.42%

Last modified Jun 17, 2026

CVE-2017-0904 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 2.42% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

2.42%

82.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Private Address Check Project	Private Address Check	< 0.4.0

References

https://edoverflow.com/2017/ruby-resolv-bug/Issue Tracking, Third Party Advisory
https://github.com/jtdowney/private_address_check/commit/58a0d7fe31de339c0117160567a5b33ad82b46afThird Party Advisory
https://github.com/jtdowney/private_address_check/issues/1Issue Tracking, Third Party Advisory
https://hackerone.com/reports/287245Issue Tracking, Mitigation, Patch, Third Party Advisory
https://hackerone.com/reports/287835Permissions Required, Third Party Advisory
https://edoverflow.com/2017/ruby-resolv-bug/Issue Tracking, Third Party Advisory
https://github.com/jtdowney/private_address_check/commit/58a0d7fe31de339c0117160567a5b33ad82b46afThird Party Advisory
https://github.com/jtdowney/private_address_check/issues/1Issue Tracking, Third Party Advisory
https://hackerone.com/reports/287245Issue Tracking, Mitigation, Patch, Third Party Advisory
https://hackerone.com/reports/287835Permissions Required, Third Party Advisory

Timeline

Published: Nov 13, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-0904?

How severe is CVE-2017-0904?

Severity scoring for CVE-2017-0904 is pending analysis. The EPSS model estimates a 2.42% probability of exploitation in the next 30 days.

How do I fix CVE-2017-0904?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-0904?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST