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CVE-2017-0903

CRITICAL

RubyGems vulnerable to Deserialization of Untrusted Data

Published May 13, 2022Updated February 22, 2024Source: osv

Summary

RubyGems versions between 2.0.0 and 2.6.13 are vulnerable to a possible remote code execution vulnerability. YAML deserialization of gem specifications can bypass class white lists. Specially crafted serialized objects can possibly be used to escalate to remote code execution. The issue has been patched in 2.6.14.

Remediation

Upgrade to the fixed version using your package manager.

Bundler
Update rubygems-update to 2.6.14 or later
gem install rubygems-update -v 2.6.14

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

Affected Packages (1)

PackageEcosystemAffectedFixed In
rubygems-update
rubygems
2.0.0, 2.0.10, 2.0.11, 2.0.12 (+61 more)2.6.14

Vulnerability Classification

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

  • CWE-502
    Deserialization of Untrusted DataMITRE

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-2017-0903?
RubyGems vulnerable to Deserialization of Untrusted Data 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-2017-0903?
CVE-2017-0903 affects rubygems-update. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2017-0903 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-mqwr-4qf2-2hcv

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