Vulnerability in Squid

CVE-2004-0189

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.

EPSS: 0.138 (96.1th percentile) — read the EPSS interpretation.

Affected products

  • Squid — versions 2.0_patch2, 2.1_patch2, 2.3_stable5
  • N/a — versions n/a

References