Denial of service in Rubygems



Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2024-35221
CWE-ID CWE-20
Exploitation vector Network
Public exploit N/A
Vulnerable software
 RubyGems
Universal components / Libraries / Libraries used by multiple products

Vendor Ruby

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Input validation error

EUVDB-ID: #VU96998

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2024-35221

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input when reading the Manifest of Gem files when using Gem::Specification.from_yaml. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

RubyGems: 3.0.0 - 3.5.8

CPE2.3 External links

https://github.com/rubygems/rubygems.org/security/advisories/GHSA-4vc5-whwr-7hh2
https://en.wikipedia.org/wiki/Billion_laughs_attack
https://github.com/ruby/ruby/blob/7cf74a2ff28b1b4c26e367d0d67521f7e1fed239/lib/rubygems/safe_yaml.rb#L28


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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