Rack Gem on Ruby Header Parser denial of service

CVSS Meta Temp Score
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CTI Interest Score
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4.9$0-$5k0.00

Summaryinfo

A vulnerability was found in Rack Gem on Ruby. It has been rated as problematic. The impacted element is an unknown function of the component Header Parser. The manipulation leads to denial of service. This vulnerability is uniquely identified as CVE-2023-27539. The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Rack Gem on Ruby (Ruby Gem) (version unknown). It has been rated as problematic. This issue affects an unknown function of the component Header Parser. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability. The summary by CVE is:

There is a denial of service vulnerability in the header parsing component of Rack.

The weakness was disclosed 03/17/2023. It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2023-27539 since 03/02/2023. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 207797 (ubuntu_linux USN-7036-1: Ubuntu 22.04 LTS : Rack vulnerabilities (USN-7036-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (207797). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.0
VulDB Meta Temp Score: 4.9

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

NVD Base Score: 5.3
NVD Vector: 🔍

CNA Base Score: 5.3
CNA Vector: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Denial of service
CWE: 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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Nessus ID: 207797
Nessus Name: ubuntu_linux USN-7036-1: Ubuntu 22.04 LTS : Rack vulnerabilities (USN-7036-1)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

03/02/2023 🔍
03/17/2023 +15 days 🔍
03/17/2023 +0 days 🔍
10/10/2025 +938 days 🔍

Sourcesinfo

Advisory: github.com
Status: Confirmed

CVE: CVE-2023-27539 (🔍)
GCVE (CVE): GCVE-0-2023-27539
GCVE (VulDB): GCVE-100-223307

Entryinfo

Created: 03/17/2023 08:59
Updated: 10/10/2025 18:49
Changes: 03/17/2023 08:59 (38), 09/26/2024 22:07 (17), 01/09/2025 12:37 (1), 01/10/2025 09:27 (12), 10/10/2025 18:49 (11)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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