| Assigner | GitHub_M |
| Reserved | 2024-05-14 |
| Published | 2024-05-29 |
| Updated | 2024-06-06 |
Description
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.
| CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L |
Problem types
CWE-400: Uncontrolled Resource Consumption
Product status
References
https://github.com/rubygems/rubygems.org/security/advisories/GHSA-4vc5-whwr-7hh2
https://en.wikipedia.org/wiki/Billion_laughs_attack
