CVE-2005-0194

Squid 2.5, when processing the configuration file, parses empty Access Control Lists (ACLs), including proxy_auth ACLs without defined auth schemes, in a way that effectively removes arguments, which could allow remote attackers to bypass intended ACLs if the administrator ignores the parser warnings.

Published: 2005-05-02 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2005-0194 is rated Moderate Risk (64.2/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 0.66%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2005-0194

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-12-07 1.01% 0.66% -0.35%
2 2025-03-30 1.69% 1.01% -0.68%
3 2025-03-29 — 1.69% —

Full EPSS history (11 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2005-0194

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
10.0 2.0 HIGH
AV:N/AC:L/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 10.0 10.0 [email protected]

Weakness enumeration for CVE-2005-0194

OS Trackers for CVE-2005-0194

vendor priority summary link
debian not yet assigned CVE-2005-0194 not yet assigned priority: Debian including 1 source packages (squid), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2005-0194
ubuntu medium CVE-2005-0194 medium priority: Ubuntu including 1 source packages (squid), 4 status rows across 4 suites (dapper, edgy, feisty, upstream): released 3, needs-triage 1. https://ubuntu.com/security/CVE-2005-0194

Affected software / configurations for CVE-2005-0194

Vendor Product Version Raw CPE
squid squid 2.0.patch1 cpe:2.3:a:squid:squid:2.0.patch1:*:*:*:*:*:*:*
squid squid 2.0.patch2 cpe:2.3:a:squid:squid:2.0.patch2:*:*:*:*:*:*:*
squid squid 2.0.pre1 cpe:2.3:a:squid:squid:2.0.pre1:*:*:*:*:*:*:*
squid squid 2.0.release cpe:2.3:a:squid:squid:2.0.release:*:*:*:*:*:*:*
squid squid 2.1.patch1 cpe:2.3:a:squid:squid:2.1.patch1:*:*:*:*:*:*:*
squid squid 2.1.patch2 cpe:2.3:a:squid:squid:2.1.patch2:*:*:*:*:*:*:*
squid squid 2.1.pre1 cpe:2.3:a:squid:squid:2.1.pre1:*:*:*:*:*:*:*
squid squid 2.1.pre3 cpe:2.3:a:squid:squid:2.1.pre3:*:*:*:*:*:*:*
squid squid 2.1.pre4 cpe:2.3:a:squid:squid:2.1.pre4:*:*:*:*:*:*:*
squid squid 2.1.release cpe:2.3:a:squid:squid:2.1.release:*:*:*:*:*:*:*
squid squid 2.2.devel3 cpe:2.3:a:squid:squid:2.2.devel3:*:*:*:*:*:*:*
squid squid 2.2.devel4 cpe:2.3:a:squid:squid:2.2.devel4:*:*:*:*:*:*:*
squid squid 2.2.pre1 cpe:2.3:a:squid:squid:2.2.pre1:*:*:*:*:*:*:*
squid squid 2.2.pre2 cpe:2.3:a:squid:squid:2.2.pre2:*:*:*:*:*:*:*
squid squid 2.2.stable1 cpe:2.3:a:squid:squid:2.2.stable1:*:*:*:*:*:*:*
squid squid 2.2.stable2 cpe:2.3:a:squid:squid:2.2.stable2:*:*:*:*:*:*:*
squid squid 2.2.stable3 cpe:2.3:a:squid:squid:2.2.stable3:*:*:*:*:*:*:*
squid squid 2.2.stable4 cpe:2.3:a:squid:squid:2.2.stable4:*:*:*:*:*:*:*
squid squid 2.2.stable5 cpe:2.3:a:squid:squid:2.2.stable5:*:*:*:*:*:*:*
squid squid 2.3.devel2 cpe:2.3:a:squid:squid:2.3.devel2:*:*:*:*:*:*:*
squid squid 2.3.devel3 cpe:2.3:a:squid:squid:2.3.devel3:*:*:*:*:*:*:*
squid squid 2.3.stable1 cpe:2.3:a:squid:squid:2.3.stable1:*:*:*:*:*:*:*
squid squid 2.3.stable2 cpe:2.3:a:squid:squid:2.3.stable2:*:*:*:*:*:*:*
squid squid 2.3.stable3 cpe:2.3:a:squid:squid:2.3.stable3:*:*:*:*:*:*:*
squid squid 2.3.stable4 cpe:2.3:a:squid:squid:2.3.stable4:*:*:*:*:*:*:*
squid squid 2.3.stable5 cpe:2.3:a:squid:squid:2.3.stable5:*:*:*:*:*:*:*
squid squid 2.4.stable1 cpe:2.3:a:squid:squid:2.4.stable1:*:*:*:*:*:*:*
squid squid 2.4.stable2 cpe:2.3:a:squid:squid:2.4.stable2:*:*:*:*:*:*:*
squid squid 2.4.stable3 cpe:2.3:a:squid:squid:2.4.stable3:*:*:*:*:*:*:*
squid squid 2.4.stable4 cpe:2.3:a:squid:squid:2.4.stable4:*:*:*:*:*:*:*
squid squid 2.4.stable6 cpe:2.3:a:squid:squid:2.4.stable6:*:*:*:*:*:*:*
squid squid 2.4.stable7 cpe:2.3:a:squid:squid:2.4.stable7:*:*:*:*:*:*:*
squid squid 2.5.stable1 cpe:2.3:a:squid:squid:2.5.stable1:*:*:*:*:*:*:*
squid squid 2.5.stable2 cpe:2.3:a:squid:squid:2.5.stable2:*:*:*:*:*:*:*
squid squid 2.5.stable3 cpe:2.3:a:squid:squid:2.5.stable3:*:*:*:*:*:*:*
squid squid 2.5.stable4 cpe:2.3:a:squid:squid:2.5.stable4:*:*:*:*:*:*:*
squid squid 2.5.stable5 cpe:2.3:a:squid:squid:2.5.stable5:*:*:*:*:*:*:*
squid squid 2.5.stable6 cpe:2.3:a:squid:squid:2.5.stable6:*:*:*:*:*:*:*

References for CVE-2005-0194

cvelogic Threat Intelligence