Squid Web Proxy up to 6.3 HTTP Response Cache structural elements

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.4$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Squid Web Proxy up to 6.3. This issue affects some unknown processing of the component HTTP Response Cache Handler. The manipulation results in improper handling of structural elements. This vulnerability is known as CVE-2023-5824. It is possible to launch the attack remotely. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in Squid Web Proxy up to 6.3 (Firewall Software). Affected is an unknown functionality of the component HTTP Response Cache Handler. The manipulation with an unknown input leads to a improper handling of structural elements vulnerability. CWE is classifying the issue as CWE-237. The product does not handle or incorrectly handles inputs that are related to complex structures. This is going to have an impact on availability.

The weakness was published 10/27/2023 as GHSA-543m-w2m2-g255. The advisory is shared for download at github.com. This vulnerability is traded as CVE-2023-5824 since 10/27/2023. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 236724 (Alibaba Cloud Linux 3 : 0020: squid:4 (ALINUX3-SA-2024:0020)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.4 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at squid-cache.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (236724) and EUVD (EUVD-2023-58107). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.4

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

NVD Base Score: 7.5
NVD Vector: 🔍

CNA Base Score: 7.5
CNA Vector (Red Hat, Inc.): 🔍

CVSSv2info

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

Exploitinginfo

Class: Improper handling of structural elements
CWE: CWE-237 / CWE-229 / CWE-20
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: 236724
Nessus Name: Alibaba Cloud Linux 3 : 0020: squid:4 (ALINUX3-SA-2024:0020)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Squid Web Proxy 6.4
Patch: squid-cache.org

Timelineinfo

10/27/2023 🔍
10/27/2023 +0 days 🔍
10/27/2023 +0 days 🔍
09/13/2025 +687 days 🔍

Sourcesinfo

Advisory: GHSA-543m-w2m2-g255
Status: Confirmed

CVE: CVE-2023-5824 (🔍)
GCVE (CVE): GCVE-0-2023-5824
GCVE (VulDB): GCVE-100-243720
EUVD: 🔍

Entryinfo

Created: 10/27/2023 15:41
Updated: 09/13/2025 04:57
Changes: 10/27/2023 15:41 (39), 10/27/2023 15:43 (2), 11/19/2023 09:14 (1), 11/19/2023 09:17 (21), 09/16/2024 23:50 (22), 05/16/2025 18:03 (2), 09/13/2025 04:57 (1)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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