Squid Proxy up to 3.5.16/4.0.8 ESI Response memory corruption

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

Summaryinfo

A vulnerability classified as critical was found in Squid Proxy up to 3.5.16/4.0.8. This issue affects some unknown processing of the component ESI Response Handler. Executing a manipulation can lead to memory corruption. This vulnerability appears as CVE-2016-4054. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability has been found in Squid Proxy up to 3.5.16/4.0.8 (Firewall Software) and classified as critical. This vulnerability affects an unknown function of the component ESI Response Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Buffer overflow in Squid 3.x before 3.5.17 and 4.x before 4.0.9 allows remote attackers to execute arbitrary code via crafted Edge Side Includes (ESI) responses.

The weakness was presented 04/20/2016 with CESG as SQUID-2016:6 as confirmed advisory (Website). The advisory is shared for download at squid-cache.org. This vulnerability was named CVE-2016-4054 since 04/20/2016. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit 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 3.5.17 or 4.0.9 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 Tenable (91393), SecurityFocus (BID 86788†) and SecurityTracker (ID 1035647†). See VDB-82766, VDB-82767, VDB-82769 and VDB-87127 for similar entries. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.3

VulDB Base Score: 8.8
VulDB Temp Score: 8.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.1
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
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: 91393
Nessus Name: CentOS 6 : squid34 (CESA-2016:1140)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 840438
OpenVAS Name: CentOS Update for squid34 CESA-2016:1140 centos6
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 3.5.17/4.0.9

Timelineinfo

04/20/2016 🔍
04/20/2016 +0 days 🔍
04/20/2016 +0 days 🔍
04/20/2016 +0 days 🔍
04/21/2016 +1 days 🔍
04/23/2016 +2 days 🔍
04/25/2016 +2 days 🔍
06/01/2016 +36 days 🔍
10/21/2018 +872 days 🔍

Sourcesinfo

Vendor: squid-cache.org

Advisory: SQUID-2016:6
Organization: CESG
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-4054 (🔍)
GCVE (CVE): GCVE-0-2016-4054
GCVE (VulDB): GCVE-100-82768

OVAL: 🔍

SecurityFocus: 86788 - Squid Multiple Buffer Overflow and Information Disclosure Vulnerabilities
SecurityTracker: 1035647

See also: 🔍

Entryinfo

Created: 04/23/2016 11:36
Updated: 10/21/2018 09:54
Changes: 04/23/2016 11:36 (67), 10/21/2018 09:54 (20)
Complete: 🔍
Cache ID: 216:F34:103

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

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