HOMEVULNERABILITIESCVE-2017-0904
HIGH

CVE-2017-0904

CWE-242Published: November 13, 2017· Updated: Jun 17, 2026

8.1
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2017-0904 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.1.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityHigh
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

private_address_check_project1 product(s)
private address check
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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Official Patches & Advisories

PATCHhttps://hackerone.com/reports/287245
PATCHhttps://hackerone.com/reports/287245
ADVISORYhttps://edoverflow.com/2017/ruby-resolv-bug/
ADVISORYhttps://github.com/jtdowney/private_address_check/commit/58a0d7fe31de339c0117160567a5b33ad82b46af
ADVISORYhttps://github.com/jtdowney/private_address_check/issues/1
ADVISORYhttps://hackerone.com/reports/287835
ADVISORYhttps://edoverflow.com/2017/ruby-resolv-bug/
ADVISORYhttps://github.com/jtdowney/private_address_check/commit/58a0d7fe31de339c0117160567a5b33ad82b46af
ADVISORYhttps://github.com/jtdowney/private_address_check/issues/1
ADVISORYhttps://hackerone.com/reports/287835

All References (10)

→
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

Quick Facts

CVE IDCVE-2017-0904
CVSS Score8.1 / 10
SeverityHIGH
WeaknessCWE-242
CISA KEVNo
Affected1 vendor(s)
PublishedNov 13, 2017

Related CVEs (CWE-242)

CVE-2024-52324
9.8
CVE-2017-1002157
9.8
CVE-2025-49215
8.8
CVE-2022-36310
8.8
CVE-2026-6477
8.8
CVE-2021-42543
7.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2017-0904 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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