MEDIUM

GHSA-hxhj-hp9m-qwc4

private_address_check vulnerable to bypass of Resolv.getaddresses method

Quick fix

GHSA-hxhj-hp9m-qwc4 — private_address_check: upgrade to the fixed version with the command below.

bundle update private_address_check

Details

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.

Are you affected?

Enter the version of the package you're using.

Affected packages

RubyGems/private_address_check

Introduced in: 0Fixed in: 0.4.0

Fixbundle update private_address_check

References

https://nvd.nist.gov/vuln/detail/CVE-2017-0904[ADVISORY]
https://github.com/jtdowney/private_address_check/issues/1[WEB]
https://github.com/jtdowney/private_address_check/commit/58a0d7fe31de339c0117160567a5b33ad82b46af[WEB]
https://hackerone.com/reports/287245[WEB]
https://hackerone.com/reports/287835[WEB]
https://edoverflow.com/2017/ruby-resolv-bug[WEB]