CVE-2024-35221: Denial of service when publishing a package on rubygems.org
First published: Wed May 29 2024(Updated: )
Rubygems.org is the Ruby community's gem hosting service. A Gem publisher can cause a Remote DoS when publishing a Gem. This is due to how Ruby reads the Manifest of Gem files when using Gem::Specification.from_yaml. from_yaml makes use of SafeYAML.load which allows YAML aliases inside the YAML-based metadata of a gem. YAML aliases allow for Denial of Service attacks with so-called `YAML-bombs` (comparable to Billion laughs attacks). This was patched. There is is no action required by users. This issue is also tracked as GHSL-2024-001 and was discovered by the GitHub security lab.
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| RubyGems |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2024-35221?
CVE-2024-35221 is considered a critical vulnerability due to its potential for causing a Remote Denial of Service (DoS) when a Gem is published.
How do I fix CVE-2024-35221?
To mitigate CVE-2024-35221, ensure that your RubyGems environment is updated to the latest version that incorporates fixes for the vulnerability.
What types of systems are affected by CVE-2024-35221?
CVE-2024-35221 affects systems using RubyGems, particularly the RubyGems.org service for publishing Gems.
How does CVE-2024-35221 exploit Ruby's processing of YAML files?
CVE-2024-35221 exploits the way Ruby reads the Manifest of Gem files via Gem::Specification.from_yaml, leading to possible Remote DoS.
Can CVE-2024-35221 be exploited by any registered Gem publisher?
Yes, any registered Gem publisher can exploit CVE-2024-35221 by crafting specific Gem files to trigger the vulnerability.
- agent/references
- agent/weakness
- agent/title
- agent/description
- agent/type
- agent/first-publish-date
- agent/severity
- agent/author
- agent/event
- collector/nvd-api
- source/NVD
- collector/epss-latest
- source/FIRST
- agent/epss
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/source
- agent/softwarecombine
- agent/tags
- agent/guess-ai
- agent/software-canonical-lookup
- agent/software-canonical-lookup-request
- vendor/rubygems
- canonical/rubygems