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CVE-2017-0904

8.1 · HIGH

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,…

Published Nov 13, 2017CWE-242EPSS 2.42%

Overview

CVE-2017-0904 is a high-severity vulnerability. It was published on November 13, 2017 and has a CVSS 3.0 base score of 8.1 (HIGH).

This vulnerability has a CVSS 3.0 base score of 8.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refedoverflow.com/2017/ruby-resolv-bug/GitHubgithub.com/jtdowney/private_address_check/commit/58a0d7fe31de339c0117160567a5b33ad82b46afGitHubgithub.com/jtdowney/private_address_check/issues/1Refhackerone.com/reports/287245Refhackerone.com/reports/287835Refedoverflow.com/2017/ruby-resolv-bug/GitHubgithub.com/jtdowney/private_address_check/commit/58a0d7fe31de339c0117160567a5b33ad82b46afGitHubgithub.com/jtdowney/private_address_check/issues/1Refhackerone.com/reports/287245Refhackerone.com/reports/287835

How CyberStrike helps

Frequently asked questions

What is CVE-2017-0904?

CVE-2017-0904 is a high-severity vulnerability. It was published on November 13, 2017 and has a CVSS 3.0 base score of 8.1 (HIGH).

How severe is CVE-2017-0904?

This vulnerability has a CVSS 3.0 base score of 8.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2017-0904?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2017-0904?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2017-0904 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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