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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6.0$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Squid Proxy up to 3.5.16/4.0.8. Impacted is an unknown function of the component ESI Response Handler. The manipulation leads to memory corruption. This vulnerability is traded as CVE-2016-4053. It is possible to initiate the attack remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Squid Proxy up to 3.5.16/4.0.8 (Firewall Software) and classified as critical. This issue affects an unknown functionality of the component ESI Response Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Squid 3.x before 3.5.17 and 4.x before 4.0.9 allow remote attackers to obtain sensitive stack layout information via crafted Edge Side Includes (ESI) responses, related to incorrect use of assert and compiler optimization.

The weakness was shared 04/20/2016 with CESG as SQUID-2016:6 as confirmed advisory (Website). The advisory is shared at squid-cache.org. The identification of this vulnerability is CVE-2016-4053 since 04/20/2016. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. 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 3.5.17 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 91787†) and SecurityTracker (ID 1035647†). The entries VDB-76354, VDB-78584, VDB-78603 and VDB-78601 are related to this item. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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Vendor

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.1

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

NVD Base Score: 3.7
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: 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 🔍
04/21/2016 +1 days 🔍
04/23/2016 +2 days 🔍
04/25/2016 +2 days 🔍
06/01/2016 +36 days 🔍
07/15/2016 +44 days 🔍
10/21/2018 +828 days 🔍

Sourcesinfo

Vendor: squid-cache.org

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

CVE: CVE-2016-4053 (🔍)
GCVE (CVE): GCVE-0-2016-4053
GCVE (VulDB): GCVE-100-82769

OVAL: 🔍

SecurityFocus: 91787 - Oracle July 2016 Critical Patch Update Multiple Vulnerabilities
SecurityTracker: 1035647

See also: 🔍

Entryinfo

Created: 04/23/2016 11:36
Updated: 10/21/2018 09:53
Changes: 04/23/2016 11:36 (67), 10/21/2018 09:53 (19)
Complete: 🔍
Cache ID: 216::103

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

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