Squid Proxy 3.5.13/4.0 HTTP Status Code http.cc input validation

CVSS Meta Temp Score
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CTI Interest Score
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7.0$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in Squid Proxy 3.5.13/4.0. The impacted element is an unknown function of the file http.cc of the component HTTP Status Code Handler. The manipulation results in input validation. This vulnerability is reported as CVE-2016-2572. The attack can be launched remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Squid Proxy 3.5.13/4.0 (Firewall Software). It has been classified as critical. Affected is some unknown functionality of the file http.cc of the component HTTP Status Code Handler. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on availability. CVE summarizes:

http.cc in Squid 4.x before 4.0.7 relies on the HTTP status code after a response-parsing failure, which allows remote HTTP servers to cause a denial of service (assertion failure and daemon exit) via a malformed response.

The weakness was disclosed 02/23/2016 by Alex with Open Systems AG (oss-sec). The advisory is shared for download at openwall.com. This vulnerability is traded as CVE-2016-2572 since 02/26/2016. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 89080 (Squid 3.x < 3.5.15 / 4.x < 4.0.7 Multiple DoS), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Firewalls and running in the context r. The commercial vulnerability scanner Qualys is able to test this issue with plugin 169027 (SUSE Enterprise Linux Security Update for squid3 (SUSE-SU-2016:1996-1)).

Upgrading 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 (111080), Tenable (89080), SecurityFocus (BID 83406†) and Vulnerability Center (SBV-57687†). The entries VDB-4435, VDB-7183, VDB-9526 and VDB-67519 are pretty similar. Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.5
VulDB Temp Score: 6.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 89080
Nessus Name: Squid 3.x < 3.5.15 / 4.x < 4.0.7 Multiple DoS
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 103320
OpenVAS Name: Squid http.cc Denial of Service Vulnerability (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: 🔍

Timelineinfo

02/23/2016 🔍
02/23/2016 +0 days 🔍
02/23/2016 +0 days 🔍
02/26/2016 +3 days 🔍
02/27/2016 +1 days 🔍
02/27/2016 +0 days 🔍
03/01/2016 +3 days 🔍
03/02/2016 +1 days 🔍
03/23/2016 +21 days 🔍
07/08/2022 +2298 days 🔍

Sourcesinfo

Vendor: squid-cache.org

Advisory: RHSA-2016:2600
Researcher: Alex
Organization: Open Systems AG
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-2572 (🔍)
GCVE (CVE): GCVE-0-2016-2572
GCVE (VulDB): GCVE-100-81132
X-Force: 111080 - Squid http.cc denial of service
SecurityFocus: 83406 - Squid Multiple Denial of Service Vulnerabilities
SecurityTracker: 1035101
Vulnerability Center: 57687 - Squid 3.x before 3.5.15 and 4.x before 4.0.7 Remote DoS via a Malformed Response, Medium

See also: 🔍

Entryinfo

Created: 03/01/2016 09:39
Updated: 07/08/2022 17:32
Changes: 03/01/2016 09:39 (75), 02/02/2019 11:36 (14), 07/08/2022 17:32 (5)
Complete: 🔍
Cache ID: 216::103

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