CVE Catalog

CVE-2004-0189

High
Published: Translated: NVD NIST

Summary

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, causing Squid to use only a portion of the requested URL when comparing it against the access control lists.

Risk Assessment

The organization may be exposed to unauthorized access to resources, as attackers can manipulate URLs to bypass security measures.

Recommendation

It is recommended to upgrade to a newer version of Squid that is not vulnerable to this issue and to review ACL rules to strengthen security.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS