CVE-2004-0189

Squid Proxy 2.4/2.5 - NULL URL Character Unauthorized Access

Severity Score

9.1

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The "%xx" URL decoding function in Squid 2.5STABLE4 and earlier allows remote attackers to bypass url_regex ACLs via a URL with a NULL ("%00") character, which causes Squid to use only a portion of the requested URL when comparing it against the access control lists.

La función de decodificación de URL "%xx" en Squid 2.5STABLE4 y anteriores permite a atacantes remotos saltarse las listas de control de acceso (ACL) url_regex mediante una URL con un carácter nulo ("%00"), lo que hace que Squid use sólo un parte de la URL solicitada para compararla con la lista de control de acceso.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2004-03-01 First Exploit
2004-03-03 CVE Reserved
2004-03-15 CVE Published
2024-08-08 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CAPEC

References (18)

URL	Tag	Source
http://marc.info/?l=bugtraq&m=108084935904110&w=2	Mailing List
http://www.osvdb.org/5916	Vdb Entry
https://exchange.xforce.ibmcloud.com/vulnerabilities/15366	Vdb Entry
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A877	Signature
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A941	Signature

URL	Date	SRC
https://www.exploit-db.com/exploits/23777	2004-03-01
http://www.securityfocus.com/bid/9778	2024-08-08
http://www.squid-cache.org/Advisories/SQUID-2004_1.txt	2024-08-08

URL	Date	SRC

URL	Date	SRC
ftp://ftp.sco.com/pub/updates/UnixWare/SCOSA-2005.16/SCOSA-2005.16.txt	2017-10-10
ftp://patches.sgi.com/support/free/security/advisories/20040404-01-U.asc	2017-10-10
http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000838	2017-10-10
http://security.gentoo.org/glsa/glsa-200403-11.xml	2017-10-10
http://www.debian.org/security/2004/dsa-474	2017-10-10
http://www.mandrakesoft.com/security/advisories?name=MDKSA-2004:025	2017-10-10
http://www.redhat.com/support/errata/RHSA-2004-133.html	2017-10-10
http://www.redhat.com/support/errata/RHSA-2004-134.html	2017-10-10
https://access.redhat.com/security/cve/CVE-2004-0189	2004-03-29
https://bugzilla.redhat.com/show_bug.cgi?id=1617177	2004-03-29

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Squid Search vendor "Squid"		Squid Search vendor "Squid" for product "Squid"				2.0_patch2 Search vendor "Squid" for product "Squid" and version "2.0_patch2"		-		Affected
Squid Search vendor "Squid"		Squid Search vendor "Squid" for product "Squid"				2.1_patch2 Search vendor "Squid" for product "Squid" and version "2.1_patch2"		-		Affected
Squid Search vendor "Squid"		Squid Search vendor "Squid" for product "Squid"				2.3_stable5 Search vendor "Squid" for product "Squid" and version "2.3_stable5"		-		Affected
Squid Search vendor "Squid"		Squid Search vendor "Squid" for product "Squid"				2.4 Search vendor "Squid" for product "Squid" and version "2.4"		-		Affected
Squid Search vendor "Squid"		Squid Search vendor "Squid" for product "Squid"				2.4_stable7 Search vendor "Squid" for product "Squid" and version "2.4_stable7"		-		Affected
Squid Search vendor "Squid"		Squid Search vendor "Squid" for product "Squid"				2.5_stable3 Search vendor "Squid" for product "Squid" and version "2.5_stable3"		-		Affected
Squid Search vendor "Squid"		Squid Search vendor "Squid" for product "Squid"				2.5_stable4 Search vendor "Squid" for product "Squid" and version "2.5_stable4"		-		Affected