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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4.8$0-$5k0.00

Summaryinfo

A vulnerability was found in Squid Proxy up to 2.4.STABLE3. It has been classified as problematic. This issue affects some unknown processing of the component FTP URI Handler. Performing a manipulation results in denial of service. This vulnerability is reported as CVE-2002-0068. Moreover, an exploit is present. Upgrading the affected component is recommended.

Detailsinfo

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. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. The summary by CVE is:

Squid 2.4 STABLE3 and earlier allows remote attackers to cause a denial of service (core dump) and possibly execute arbitrary code with an ftp:// URL with a larger number of special characters, which exceed the buffer when Squid URL-escapes the characters.

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.

A public exploit has been developed in ANSI C. The exploit is shared for download at securityfocus.com. It is declared as proof-of-concept. 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 r. The commercial vulnerability scanner Qualys is able to test this issue with plugin 62012 (Squid Cache FTP Proxy URL Buffer Overflow Vulnerability).

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (8258), Exploit-DB (21297), Tenable (10923), SecurityFocus (BID 4148†) and OSVDB (5378†). The entries VDB-17966 and VDB-17968 are pretty similar. Be aware that VulDB is the high quality 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: 5.3
VulDB Meta Temp Score: 4.8

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

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

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

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
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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: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍
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Timelineinfo

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 🔍
09/23/2025 +4092 days 🔍

Sourcesinfo

Vendor: squid-cache.org

Advisory: redhat.com
Researcher: Jouko Pynnonen
Organization: Squid
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2002-0068 (🔍)
GCVE (CVE): GCVE-0-2002-0068
GCVE (VulDB): GCVE-100-17967
X-Force: 8258
SecurityFocus: 4148 - Squid Cache FTP Proxy URL Buffer Overflow Vulnerability
OSVDB: 5378 - Squid FTP URL Special Character Handling Remote Overflow
Vulnerability Center: 1869 - DoS in Squid 2.4 STABLE3 and earlier, Critical

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

Entryinfo

Created: 07/11/2014 13:41
Updated: 09/23/2025 04:41
Changes: 07/11/2014 13:41 (76), 05/12/2019 09:30 (7), 03/30/2025 23:51 (19), 09/23/2025 04:41 (2)
Complete: 🔍
Cache ID: 216::103

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