Squid Web Proxy up to 5.9/6.3 HTTP/ICAP request smuggling

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.6$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Squid Web Proxy up to 5.9/6.3. This affects an unknown function of the component HTTP/ICAP. The manipulation leads to request smuggling. This vulnerability is listed as CVE-2023-46846. The attack may be initiated remotely. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Squid Web Proxy up to 5.9/6.3 (Firewall Software). This issue affects an unknown functionality of the component HTTP/ICAP. The manipulation with an unknown input leads to a request smuggling vulnerability. Using CWE to declare the problem leads to 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. Impacted is integrity.

The weakness was presented 10/27/2023 as GHSA-j83v-w3p4-5cqh. The advisory is shared at github.com. The identification of this vulnerability is CVE-2023-46846 since 10/27/2023. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 213093 (RHEL 7 : squid (RHSA-2024:11049)), 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 (213093) and EUVD (EUVD-2023-51012). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.6
VulDB Meta Temp Score: 6.6

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

NVD Base Score: 5.3
NVD Vector: 🔍

CNA Base Score: 9.3
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: 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: 🔍

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Nessus ID: 213093
Nessus Name: RHEL 7 : squid (RHSA-2024:11049)

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 🔍
07/10/2025 +622 days 🔍

Sourcesinfo

Advisory: GHSA-j83v-w3p4-5cqh
Status: Confirmed

CVE: CVE-2023-46846 (🔍)
GCVE (CVE): GCVE-0-2023-46846
GCVE (VulDB): GCVE-100-243713
EUVD: 🔍

Entryinfo

Created: 10/27/2023 12:30
Updated: 07/10/2025 10:10
Changes: 10/27/2023 12:30 (39), 10/27/2023 12:31 (2), 11/19/2023 08:45 (1), 11/19/2023 08:46 (21), 09/16/2024 18:50 (16), 12/18/2024 10:33 (2), 07/10/2025 10:10 (1)
Complete: 🔍
Cache ID: 216::103

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

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