CVEvulnerability

CVE-2004-0189

7.5 HIGH Published 2004-03-15 Modified 2026-06-16 Official page ↗
Status
Modified
Published
2004-03-15
Last modified
2026-06-16
Assigner
[email protected]
CVSS 2.0 ([email protected])
7.5 HIGH — AV:N/AC:L/Au:N/C:P/I:P/A:P

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.

Affected configurations

• squid squid 2.0 patch2 • squid squid 2.1 patch2 • squid squid 2.3 stable5 • squid squid 2.4 • squid squid 2.4 stable7 • squid squid 2.5 stable3 • squid squid 2.5 stable4

Related

Referenced by CWE · observed example (2)

  • CWE-158 Improper Neutralization of Null Byte or NUL Character weakness
  • CWE-177 Improper Handling of URL Encoding (Hex Encoding) weakness

References