Loading...
Skip to main content
GeekWala

CVE-2017-7540 — Vulnerability in safemode — CVE Details

CRITICAL

Safemode Gem Has Incomplete List of Disallowed Inputs

Published October 24, 2017Updated February 16, 2024Source: osv

Summary

rubygem-safemode, as used in Foreman, versions 1.3.1 and earlier are vulnerable to bypassing safe mode limitations via special Ruby syntax. This can lead to deletion of objects for which the user does not have delete permissions or possibly to privilege escalation.

Advisory Timeline

  • First published October 24, 2017 (3275 days ago).
  • Last revised February 16, 2024 — 2306 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Bundler
Update safemode to 1.3.2 or later
gem install safemode -v 1.3.2

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: rubygems (1).

PackageEcosystemAffectedFixed In
safemode
rubygems
0.0.2, 1.0.0, 1.0.1, 1.0.2 (+8 more)1.3.2

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 9.8 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Frequently Asked Questions

What is CVE-2017-7540?
Safemode Gem Has Incomplete List of Disallowed Inputs This vulnerability has been assigned a severity rating of CRITICAL (CVSS score: 9.8/10).
How do I check if my project is affected by CVE-2017-7540?
CVE-2017-7540 affects safemode. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2017-7540 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
9.8

Exploitation is straightforward and causes maximum impact. Patch immediately.

Also Known As

GHSA-5vx5-9q73-wgp4

Related CVEs

  • CVE-2026-55107
    CRITICAL

    kobako Sandbox Escape: guest eval reaches host RCE via method_missing → public_send (any bound Service)

  • CVE-2026-77602
    CRITICAL

    OpenC3 COSMOS: Authenticated remote code execution via the user-writable config overlay (table definitions, cmd/tlm definitions, and script suites)

  • CVE-2016-3693
    HIGH

    safemode gem allows context-dependent attackers to obtain sensitive information via the inspect method

More RubyGems advisories

Check if you're affected

Scan your dependencies to see if this vulnerability affects your projects.

Scan Your Dependencies