Squid Proxy up to 3.3.12/3.4.6 Request Parser input validation

CVSS Meta Temp Score
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CTI Interest Score
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4.6$0-$5k0.00

Summaryinfo

A vulnerability was found in Squid Proxy up to 3.3.12/3.4.6 and classified as problematic. This impacts an unknown function of the component Request Parser. The manipulation results in input validation. This vulnerability was named CVE-2014-3609. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in Squid Proxy up to 3.3.12/3.4.6 (Firewall Software). Affected is an unknown code of the component Request Parser. 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:

HttpHdrRange.cc in Squid 3.x before 3.3.12 and 3.4.x before 3.4.6 allows remote attackers to cause a denial of service (crash) via a request with crafted "Range headers with unidentifiable byte-range values."

The weakness was presented 08/27/2014 by Matthew Daley as SQUID-2014:2 as confirmed advisory (Website). The advisory is shared for download at squid-cache.org. This vulnerability is traded as CVE-2014-3609 since 05/14/2014. 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 neither technical details nor an exploit publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 77743 (SuSE 11.3 Security Update : squid3 (SAT Patch Number 9729)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 350294 (Amazon Linux Security Advisory for squid: ALAS-2014-433).

Upgrading to version 3.3.13 or 3.4.7 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability. The vulnerability will be addressed with the following lines of code:

Add the following access control lines to squid.conf above any
 http_access allow lines:

 acl validRange req_header Range \
  ^bytes=([0-9]+\-[0-9]*|\-[0-9]+)(,([0-9]+\-[0-9]*|\-[0-9]+))*$

 acl validRange req_header Request-Range \
  ^bytes=([0-9]+\-[0-9]*|\-[0-9]+)(,([0-9]+\-[0-9]*|\-[0-9]+))*$

 http_access deny !validRange
Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 16792.

The vulnerability is also documented in the databases at X-Force (95590), Tenable (77743), SecurityFocus (BID 69453†), Secunia (SA60179†) and SecurityTracker (ID 1030779†). See VDB-12599 for similar entry. Once again VulDB remains the best 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: 5.3
VulDB Meta Temp Score: 4.6

VulDB Base Score: 5.3
VulDB Temp Score: 4.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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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: 🔍

0-DayUnlockUnlockUnlockUnlock
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Nessus ID: 77743
Nessus Name: SuSE 11.3 Security Update : squid3 (SAT Patch Number 9729)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 703014
OpenVAS Name: Debian Security Advisory DSA 3014-1 (squid3 - security update)
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 3.3.13/3.4.7
TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

ISS Proventia IPS: 🔍
Fortigate IPS: 🔍

Timelineinfo

05/14/2014 🔍
08/26/2014 +104 days 🔍
08/27/2014 +1 days 🔍
08/27/2014 +0 days 🔍
08/27/2014 +0 days 🔍
08/27/2014 +0 days 🔍
08/28/2014 +1 days 🔍
08/29/2014 +1 days 🔍
08/29/2014 +0 days 🔍
09/07/2014 +9 days 🔍
09/11/2014 +4 days 🔍
09/18/2014 +7 days 🔍
02/15/2022 +2707 days 🔍

Sourcesinfo

Vendor: squid-cache.org

Advisory: SQUID-2014:2
Researcher: Matthew Daley
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2014-3609 (🔍)
GCVE (CVE): GCVE-0-2014-3609
GCVE (VulDB): GCVE-100-67428

OVAL: 🔍

X-Force: 95590 - Squid Range range denial of service, Medium Risk
SecurityFocus: 69453 - Squid CVE-2014-3609 Remote Denial of Service Vulnerability
Secunia: 60179 - Squid HTTP Range Request Handling Denial of Service Vulnerability, Moderately Critical
SecurityTracker: 1030779 - Squid Range Header Processing Flaw Lets Remote Users Deny Service
Vulnerability Center: 46003 - Squid 3.0 through 3.3.12 and 3.4 through 3.4.6 Remote DoS via a Crafted Range, High

See also: 🔍

Entryinfo

Created: 08/29/2014 10:19
Updated: 02/15/2022 07:38
Changes: 08/29/2014 10:19 (94), 06/05/2017 10:52 (6), 02/15/2022 07:38 (3)
Complete: 🔍
Cache ID: 216:82F:103

Once again VulDB remains the best source for vulnerability data.

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