VDB-236095 · CVE-2023-38697 · Nessus 251221

protocol-http1 Gem prior 0.15.1 on Ruby request smuggling

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.
5.4	$0-$5k	0.00

Summaryinfo

A vulnerability classified as problematic has been found in protocol-http1 Gem on Ruby. This affects an unknown part. This manipulation causes request smuggling. This vulnerability is registered as CVE-2023-38697. Remote exploitation of the attack is possible. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in protocol-http1 Gem on Ruby (Ruby Gem). It has been declared as problematic. Affected by this vulnerability is some unknown processing. The manipulation with an unknown input leads to a request smuggling vulnerability. The CWE definition for the vulnerability is CWE-444. The product acts as an intermediary HTTP agent (such as a proxy or firewall) in the data flow between two entities such as a client and server, but it does not interpret malformed HTTP requests or responses in ways that are consistent with how the messages will be processed by those entities that are at the ultimate destination. As an impact it is known to affect integrity.

The weakness was published 08/03/2023. It is possible to read the advisory at github.com. This vulnerability is known as CVE-2023-38697 since 07/24/2023. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 251221 (Linux Distros Unpatched Vulnerability : CVE-2023-38697), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 0.15.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (251221). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Ruby Gem

Name

protocol-http1 Gem

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.3
NVD Vector: 🔍

CNA Base Score: 5.8
CNA Vector (GitHub, Inc.): 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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

Exploitinginfo

Class: Request smuggling
CWE: CWE-444
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: 251221
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2023-38697

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: protocol-http1 Gem 0.15.1
Patch: github.com

Timelineinfo

07/24/2023 🔍
08/03/2023 +10 days 🔍
08/03/2023 +0 days 🔍
08/18/2025 +746 days 🔍

Sourcesinfo

Advisory: e11fc164fd2b36f7b7e785e69fa8859eb06bcedd
Status: Confirmed

CVE: CVE-2023-38697 (🔍)
GCVE (CVE): GCVE-0-2023-38697
GCVE (VulDB): GCVE-100-236095

Entryinfo

Created: 08/03/2023 22:27
Updated: 08/18/2025 23:04
Changes: 08/03/2023 22:27 (37), 08/26/2023 11:15 (3), 08/26/2023 11:24 (22), 08/18/2025 23:04 (17)
Complete: 🔍
Cache ID: 216:DB5:103