VDB-266561 · CVE-2024-35221 · GHSA-4vc5-whwr-7hh2

RubyGems.org prior 2024-04-12 Manifest Specification.from_yaml resource consumption

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.2	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in RubyGems.org. This impacts the function Gem::Specification.from_yaml of the component Manifest Handler. The manipulation leads to resource consumption. This vulnerability is documented as CVE-2024-35221. The attack can be initiated remotely. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in RubyGems.org. It has been rated as problematic. This issue affects the function Gem::Specification.from_yaml of the component Manifest Handler. The manipulation with an unknown input leads to a resource consumption vulnerability. Using CWE to declare the problem leads to CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. Impacted is availability. The summary by CVE is:

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.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2024-35221 since 05/14/2024. The exploitation is known to be easy. The attack may be initiated remotely. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 250302 (SUSE SLED15 / SLES15 / openSUSE 15 Security Update : ruby2.5 (SUSE-SU-2025:02814-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 2024-04-12 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (250302). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Programming Language Software

Name

RubyGems.org

CPE 2.3info

🔍

CPE 2.2info

🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.2

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 4.3
CNA Vector (GitHub, Inc.): 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Resource consumption
CWE: CWE-400 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 250302
Nessus Name: SUSE SLED15 / SLES15 / openSUSE 15 Security Update : ruby2.5 (SUSE-SU-2025:02814-1)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: RubyGems.org 2024-04-12

Timelineinfo

04/12/2024 🔍
05/14/2024 +32 days 🔍
05/30/2024 +16 days 🔍
05/30/2024 +0 days 🔍
08/16/2025 +443 days 🔍

Sourcesinfo

Advisory: GHSA-4vc5-whwr-7hh2
Status: Confirmed

CVE: CVE-2024-35221 (🔍)
GCVE (CVE): GCVE-0-2024-35221
GCVE (VulDB): GCVE-100-266561

Entryinfo

Created: 05/30/2024 07:40
Updated: 08/16/2025 15:24
Changes: 05/30/2024 07:40 (66), 08/16/2025 15:24 (3)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.