# CVE-2018-3759: private_address_check contains race condition

Source: https://junglewise.ai/threats/cve-2018-3759-private-address-check-contains-race-condition  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2018-07-31  
License: CC BY 4.0 with a link back

CVE-2018-3759 · Severity: info · Published 2018-07-31

private_address_check contains race condition

Technologies: [private_address_check (RubyGems)](https://junglewise.ai/threats/technologies/private-address-check). Vendors: [RubyGems](https://junglewise.ai/threats/vendors/rubygems).

## Quick answers

**Is CVE-2018-3759 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2018-3759 being exploited in the wild.

**How severe is CVE-2018-3759?** Informational severity, published 31 July 2018.

**Which products and versions are affected?** private_address_check (RubyGems) ECOSYSTEM:introduced=0,fixed=0.5.0.

**Is there a fix for CVE-2018-3759?** Yes. private_address_check (RubyGems): upgrade to 0.5.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2018-3759?** Check whether you run private_address_check (RubyGems) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- private_address_check (RubyGems): upgrade to 0.5.0 or later

  ```sh
  bundle update private_address_check
  ```


## Affected products

- private_address_check (RubyGems) ECOSYSTEM:introduced=0,fixed=0.5.0

## Identifiers

- CVE-2018-3759
- GHSA-2xvj-j3qh-x8c3

## Related threats

- [private_address_check contains Incomplete List of Disallowed Inputs](https://junglewise.ai/threats/cve-2017-0909-private-address-check-contains-incomplete-list-of-disallowed)
- [private_address_check vulnerable to bypass of Resolv.getaddresses method](https://junglewise.ai/threats/cve-2017-0904-private-address-check-vulnerable-to-bypass-of-resolv-getaddresses)