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CVE-2023-38037 — Vulnerability in activesupport — CVE Details

MEDIUM

Active Support Possibly Discloses Locally Encrypted Files

Published August 23, 2023Updated September 10, 2026Source: osv

Summary

There is a possible file disclosure of locally encrypted files in Active Support. This vulnerability has been assigned the CVE identifier CVE-2023-38037. Versions Affected: >= 5.2.0 Not affected: < 5.2.0 Fixed Versions: 7.0.7.1, 6.1.7.5 # Impact ActiveSupport::EncryptedFile writes contents that will be encrypted to a temporary file. The temporary file’s permissions are defaulted to the user’s current umask settings, meaning that it’s possible for other users on the same system to read the contents of the temporary file. Attackers that have access to the file system could possibly read the contents of this temporary file while a user is editing it. All users running an affected release should either upgrade or use one of the workarounds immediately. # Releases The fixed releases are available at the normal locations. # Workarounds To work around this issue, you can set your umask to be more restrictive like this: ```ruby $ umask 0077 ```

Advisory Timeline

  • First published August 23, 2023 (1146 days ago).
  • Last revised September 10, 2026 — 1113 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Bundler
Update activesupport to 7.0.7.1 or later
gem install activesupport -v 7.0.7.1
Bundler
Update activesupport to 6.1.7.5 or later
gem install activesupport -v 6.1.7.5

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

Affected Packages (2)

Affects 1 ecosystem: rubygems (1).

PackageEcosystemAffectedFixed In
activesupport
rubygems
7.0.0, 7.0.1, 7.0.2, 7.0.2.1 (+13 more)7.0.7.1
activesupport
rubygems
5.2.0, 5.2.1, 5.2.1.1, 5.2.1.rc1 (+83 more)6.1.7.5

Vulnerability Classification

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

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 5.5 score means for each attack dimension.

Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
Low
Availability
Low

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

Frequently Asked Questions

What is CVE-2023-38037?
Active Support Possibly Discloses Locally Encrypted Files This vulnerability has been assigned a severity rating of MEDIUM (CVSS score: 5.5/10).
How do I check if my project is affected by CVE-2023-38037?
CVE-2023-38037 affects activesupport. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2023-38037 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
5.5

Exploitation requires specific conditions or has limited impact. Remediate within weeks.

Also Known As

GHSA-cr5q-6q9f-rq6q

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