Squid Proxy up to 2.4.STABLE3 FTP URI denial of service

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability, which was classified as problematic, was found in Squid Proxy up to 2.4.STABLE3 (Firewall Software). This affects an unknown code block of the component FTP URI Handler. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. This is going to have an impact on availability.

The bug was discovered 02/21/2002. The weakness was disclosed 02/21/2002 by Jouko Pynnonen with Squid (Website). It is possible to read the advisory at redhat.com. This vulnerability is uniquely identified as CVE-2002-0068. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are unknown but a public exploit is available. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

A public exploit has been developed in ANSI C. It is declared as proof-of-concept. The exploit is shared for download at securityfocus.com. The vulnerability scanner Nessus provides a plugin with the ID 10923 (Squid FTP URL Special Character Handling Remote Overflow), 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 remote.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at SecurityFocus (BID 4148), X-Force (8258), Vulnerability Center (SBV-1869) and Tenable (10923). The entries 17966 and 17968 are pretty similar.





CPE 2.3infoedit

CPE 2.2infoedit


VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 4.8

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍



VulDB Base Score: 🔍
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VulDB Reliability: 🔍

NVD Base Score: 🔍


Class: Denial of service
CWE: CWE-404
ATT&CK: T1499

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Programming Language: 🔍
Download: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Nessus ID: 10923
Nessus Name: Squid FTP URL Special Character Handling Remote Overflow
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 103320
OpenVAS Name: Squid Cache FTP Proxy URL Buffer Overflow Vulnerability
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfoedit

Threat: 🔍
Adversaries: 🔍
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Economy: 🔍
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Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍
ISS Proventia IPS: 🔍


02/21/2002 🔍
02/21/2002 +0 days 🔍
02/21/2002 +0 days 🔍
03/08/2002 +15 days 🔍
03/08/2002 +0 days 🔍
03/27/2002 +19 days 🔍
09/01/2003 +523 days 🔍
04/09/2004 +220 days 🔍
07/11/2014 +3745 days 🔍
08/11/2017 +1127 days 🔍
05/12/2019 +639 days 🔍


Vendor: http://www.squid-cache.org/

Advisory: redhat.com
Researcher: Jouko Pynnonen
Organization: Squid
Status: Not defined
Confirmation: 🔍

CVE: CVE-2002-0068 (🔍)
SecurityFocus: 4148 - Squid Cache FTP Proxy URL Buffer Overflow Vulnerability
X-Force: 8258
Vulnerability Center: 1869 - DoS in Squid 2.4 STABLE3 and earlier, Critical
OSVDB: 5378 - Squid FTP URL Special Character Handling Remote Overflow

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


Created: 07/11/2014 01:41 PM
Updated: 05/12/2019 09:30 AM
Changes: (7) advisory_company_name advisory_confirm_url exploit_availability exploit_publicity exploit_url source_securityfocus_date source_securityfocus_class
Complete: 🔍


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