Rack up to 3.1.4 Rack::Request::Helpers redos

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k0.67

Summaryinfo

A vulnerability classified as critical was found in Rack up to 3.1.4. Impacted is the function Rack::Request::Helpers. Such manipulation leads to redos. This vulnerability is uniquely identified as CVE-2024-39316. The attack can be launched remotely. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Rack up to 3.1.4. It has been rated as critical. Affected by this issue is the function Rack::Request::Helpers. The manipulation with an unknown input leads to a redos vulnerability. Using CWE to declare the problem leads to CWE-1333. The product uses a regular expression with an inefficient, possibly exponential worst-case computational complexity that consumes excessive CPU cycles. Impacted is availability. CVE summarizes:

Rack is a modular Ruby web server interface. Starting in version 3.1.0 and prior to version 3.1.5, Regular Expression Denial of Service (ReDoS) vulnerability exists in the `Rack::Request::Helpers` module when parsing HTTP Accept headers. This vulnerability can be exploited by an attacker sending specially crafted `Accept-Encoding` or `Accept-Language` headers, causing the server to spend excessive time processing the request and leading to a Denial of Service (DoS). The fix for CVE-2024-26146 was not applied to the main branch and thus while the issue was fixed for the Rack v3.0 release series, it was not fixed in the v3.1 release series until v3.1.5. Users of versions on the 3.1 branch should upgrade to version 3.1.5 to receive the fix.

The advisory is available at github.com. This vulnerability is handled as CVE-2024-39316 since 06/21/2024. The exploitation is known to be easy. The attack may be launched remotely. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1449.003 by the MITRE ATT&CK project.

Upgrading to version 3.1.5 eliminates this vulnerability. Applying the patch 412c980450ca729ee37f90a2661f166a9665e058 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.3

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 6.5
CNA Vector (GitHub, Inc.): 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Redos
CWE: CWE-1333 / 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: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Rack 3.1.5
Patch: 412c980450ca729ee37f90a2661f166a9665e058

Timelineinfo

06/21/2024 🔍
07/02/2024 +11 days 🔍
07/02/2024 +0 days 🔍
10/10/2025 +465 days 🔍

Sourcesinfo

Product: github.com

Advisory: GHSA-54rr-7fvw-6x8f
Status: Confirmed

CVE: CVE-2024-39316 (🔍)
GCVE (CVE): GCVE-0-2024-39316
GCVE (VulDB): GCVE-100-270242

Entryinfo

Created: 07/02/2024 18:35
Updated: 10/10/2025 18:49
Changes: 07/02/2024 18:35 (65), 10/10/2025 18:49 (2)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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