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 has been found in Squid Proxy up to 3.5.16/4.0.8. This vulnerability affects unknown code of the component ESI Response Handler. Performing a manipulation results in memory corruption. This vulnerability is reported as CVE-2016-4052. The attack is possible to be carried out remotely. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in Squid Proxy up to 3.5.16/4.0.8 (Firewall Software). This affects some unknown processing of the component ESI Response Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Multiple stack-based buffer overflows in Squid 3.x before 3.5.17 and 4.x before 4.0.9 allow remote HTTP servers to cause a denial of service or execute arbitrary code via crafted Edge Side Includes (ESI) responses.

The weakness was disclosed 04/20/2016 with CESG as SQUID-2016:6 as confirmed advisory (Website). It is possible to read the advisory at squid-cache.org. This vulnerability is uniquely identified as CVE-2016-4052 since 04/20/2016. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not 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 pretty similar. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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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: 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 🔍
04/21/2016 +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
Confirmation: 🔍

CVE: CVE-2016-4052 (🔍)
GCVE (CVE): GCVE-0-2016-4052
GCVE (VulDB): GCVE-100-82767

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 09:54
Changes: 04/23/2016 11:36 (67), 10/21/2018 09:54 (20)
Complete: 🔍
Cache ID: 216:484:103

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