Squid Proxy 3.5.17 Host Header data authenticity

CVSS Meta Temp Score
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CTI Interest Score
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8.1$0-$5k0.00

A vulnerability was found in Squid Proxy 3.5.17 (Firewall Software) and classified as critical. Affected by this issue is an unknown code block of the component Host Header Handler. The manipulation with an unknown input leads to a data authenticity vulnerability. Using CWE to declare the problem leads to CWE-345. The product does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data. Impacted is confidentiality, integrity, and availability. CVE summarizes:

mime_header.cc in Squid before 3.5.18 allows remote attackers to bypass intended same-origin restrictions and possibly conduct cache-poisoning attacks via a crated HTTP Host header, aka a "header smuggling" issue.

The weakness was shared 05/06/2016 as SQUID-2016:8 as confirmed advisory (Website). The advisory is available at squid-cache.org. This vulnerability is handled as CVE-2016-4554 since 05/06/2016. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available.

The vulnerability scanner Nessus provides a plugin with the ID 91393 (CentOS 6 : squid34 (CESA-2016:1140)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 236019 (Red Hat Update for Squid 3.4 (RHSA-2016:1140)).

Upgrading to version 3.5.18 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (113042) and Tenable (91393).

Productinfo

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License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.7
VulDB Meta Temp Score: 8.1

VulDB Base Score: 8.8
VulDB Temp Score: 7.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.6
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Data authenticity
CWE: CWE-345
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 91393
Nessus Name: CentOS 6 : squid34 (CESA-2016:1140)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 830993
OpenVAS Name: Squid Cache Poisoning Vulnerability May16 (Windows)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: Proxy 3.5.18

Timelineinfo

05/06/2016 🔍
05/06/2016 +0 days 🔍
05/06/2016 +0 days 🔍
05/10/2016 +4 days 🔍
05/10/2016 +0 days 🔍
06/01/2016 +22 days 🔍
08/18/2022 +2269 days 🔍

Sourcesinfo

Vendor: squid-cache.org

Advisory: SQUID-2016:8
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-4554 (🔍)
OVAL: 🔍

X-Force: 113042 - Squid Host header security bypass
SecurityTracker: 1035769

Entryinfo

Created: 05/10/2016 10:40
Updated: 08/18/2022 07:35
Changes: 05/10/2016 10:40 (71), 11/23/2018 10:46 (9), 08/18/2022 07:35 (4)
Complete: 🔍
Cache ID: 3:423:103

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