Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2004-0189

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
15/03/2004
Last modified:
03/04/2025

Description

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.

Impact

Vector 2.0
AV:N/AC:L/Au:N/C:P/I:P/A:P CVSS v2.0 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): Physical
Integrity (I): Physical
Availability (A): Physical

Base Score 2.0
7.50
Severity 2.0
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:squid:squid:2.0_patch2:*:*:*:*:*:*:*
cpe:2.3:a:squid:squid:2.1_patch2:*:*:*:*:*:*:*
cpe:2.3:a:squid:squid:2.3_stable5:*:*:*:*:*:*:*
cpe:2.3:a:squid:squid:2.4:*:*:*:*:*:*:*
cpe:2.3:a:squid:squid:2.4_stable7:*:*:*:*:*:*:*
cpe:2.3:a:squid:squid:2.5_stable3:*:*:*:*:*:*:*
cpe:2.3:a:squid:squid:2.5_stable4:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools