Squid Proxy up to 3.3.7 HTTP Request input validation

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.7$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in Squid Proxy up to 3.3.7. Affected is an unknown function of the component HTTP Request Handler. This manipulation causes input validation. This vulnerability is tracked as CVE-2013-4123. Moreover, an exploit is present. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Squid Proxy up to 3.3.7 (Firewall Software). It has been declared as critical. Affected by this vulnerability is some unknown processing of the component HTTP Request Handler. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect availability. The summary by CVE is:

client_side_request.cc in Squid 3.2.x before 3.2.13 and 3.3.x before 3.3.8 allows remote attackers to cause a denial of service via a crafted port number in a HTTP Host header.

The weakness was disclosed 07/13/2013 by Alex Rousskov and Saran Neti with The Measurement Factory/TELUS Security Labs. as not defined advisory (Website). It is possible to read the advisory at squid-cache.org. The public release has been coordinated in cooperation with Squid. This vulnerability is known as CVE-2013-4123 since 06/12/2013. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are unknown but a public exploit is available.

A public exploit has been developed by king cope and been published 2 days after the advisory. It is possible to download the exploit at seclists.org. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 68898 (FreeBSD : squid -- denial of service (30a04ab4-ed7b-11e2-8643-8c705af55518)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FreeBSD Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 166349 (OpenSuSE Security Update for Squid (openSUSE-SU-2013:1435-1)).

Upgrading to version 3.2.13 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 13612.

The vulnerability is also documented in the databases at X-Force (85629), Exploit-DB (26886), Tenable (68898), SecurityFocus (BID 61159†) and OSVDB (95257†). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 6.7

VulDB Base Score: 7.5
VulDB Temp Score: 6.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

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: 🔍
Access: Public
Status: Proof-of-Concept
Author: king cope
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 68898
Nessus Name: FreeBSD : squid -- denial of service (30a04ab4-ed7b-11e2-8643-8c705af55518)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 866539
OpenVAS Name: Fedora Update for squid FEDORA-2013-13468
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Exploit Delay Time: 🔍

Upgrade: Proxy 3.2.13
TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

ISS Proventia IPS: 🔍
Fortigate IPS: 🔍

Timelineinfo

06/12/2013 🔍
07/13/2013 +31 days 🔍
07/13/2013 +0 days 🔍
07/13/2013 +0 days 🔍
07/13/2013 +0 days 🔍
07/15/2013 +2 days 🔍
07/16/2013 +1 days 🔍
07/18/2013 +2 days 🔍
07/25/2013 +7 days 🔍
09/16/2013 +53 days 🔍
11/27/2024 +4090 days 🔍

Sourcesinfo

Vendor: squid-cache.org

Advisory: squid-cache.org
Researcher: Alex Rousskov, Saran Neti
Organization: The Measurement Factory/TELUS Security Labs.
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2013-4123 (🔍)
GCVE (CVE): GCVE-0-2013-4123
GCVE (VulDB): GCVE-100-9547
X-Force: 85629
SecurityFocus: 61159 - Squid 'client_side_request.cc' File Remote Denial of Service Vulnerability
Secunia: 54142 - Squid HTTP Header Port Number Handling Denial of Service Vulnerability, Moderately Critical
OSVDB: 95257
Vulnerability Center: 40702 - Squid 3.2 - 3.2.12, 3.3 - 3.3.7 Remote DoS Vulnerability via Crafted HTTP Packet, High

scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 07/18/2013 11:58
Updated: 11/27/2024 05:58
Changes: 07/18/2013 11:58 (92), 11/23/2018 10:47 (5), 11/27/2024 05:58 (19)
Complete: 🔍
Committer:
Cache ID: 216:51E:103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you need the next level of professionalism?

Upgrade your account now!