Squid Proxy 3.5.17/4.0.9 HTTP Request data authenticity

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.1$0-$5k0.00

A vulnerability has been found in Squid Proxy 3.5.17/4.0.9 (Firewall Software) and classified as critical. Affected by this vulnerability is an unknown code of the component HTTP Request Handler. The manipulation with an unknown input leads to a data authenticity vulnerability. The CWE definition for the vulnerability is CWE-345. The product does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

client_side.cc in Squid before 3.5.18 and 4.x before 4.0.10 does not properly ignore the Host header when absolute-URI is provided, which allows remote attackers to conduct cache-poisoning attacks via an HTTP request.

The weakness was presented 05/06/2016 as SQUID-2016:7 as confirmed advisory (Website). The advisory is shared at squid-cache.org. This vulnerability is known as CVE-2016-4553 since 05/06/2016. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly 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 or 4.0.10 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 (113041) and Tenable (91393). See VDB-82766, VDB-82767, VDB-82768 and VDB-82769 for similar entries. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

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

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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: 841482
OpenVAS Name: Squid Cache Poisoning Vulnerability-01 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 3.5.18/4.0.10

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-2016:7
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-4553 (🔍)
X-Force: 113041 - SQUID HTTP request security bypass
SecurityTracker: 1035768

See also: 🔍

Entryinfo

Created: 05/10/2016 10:39 AM
Updated: 08/18/2022 07:29 AM
Changes: 05/10/2016 10:39 AM (70), 11/23/2018 10:46 AM (9), 08/18/2022 07:29 AM (4)
Complete: 🔍
Cache ID: 18:A4F:40

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