Read the docs
TI-2005-00142 Aliases CVE-2005-0173GHSA-2r4j-x5mr-ch9c

squid_ldap_auth in Squid 2.5 and earlier allows remote authenticated users to bypass…

Priority MEDIUM 57Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
— Not recorded in CVSS 2.0
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
Partial · Partial · Partial
Fix status
Fixed

Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat.

Summary

squid_ldap_auth in Squid 2.5 and earlier allows remote authenticated users to bypass username-based Access Control Lists (ACLs) via a username with a space at the beginning or end, which is ignored by the LDAP server.

Why it matters now

EPSS 0.31942 98th percentileScored 2026-11-07
Fix Fixed Red Hat: 2 advisories

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 38

CPEVersionsRoleVendor
cpe:2.3:a:squid:squid:2.0.patch1:*:*:*:*:*:*:*2.0.patch1VulnerableSquid
cpe:2.3:a:squid:squid:2.0.patch2:*:*:*:*:*:*:*2.0.patch2VulnerableSquid
cpe:2.3:a:squid:squid:2.0.pre1:*:*:*:*:*:*:*2.0.pre1VulnerableSquid
cpe:2.3:a:squid:squid:2.0.release:*:*:*:*:*:*:*2.0.releaseVulnerableSquid
cpe:2.3:a:squid:squid:2.1.patch1:*:*:*:*:*:*:*2.1.patch1VulnerableSquid
cpe:2.3:a:squid:squid:2.1.patch2:*:*:*:*:*:*:*2.1.patch2VulnerableSquid
cpe:2.3:a:squid:squid:2.1.pre1:*:*:*:*:*:*:*2.1.pre1VulnerableSquid
cpe:2.3:a:squid:squid:2.1.pre3:*:*:*:*:*:*:*2.1.pre3VulnerableSquid
cpe:2.3:a:squid:squid:2.1.pre4:*:*:*:*:*:*:*2.1.pre4VulnerableSquid
cpe:2.3:a:squid:squid:2.1.release:*:*:*:*:*:*:*2.1.releaseVulnerableSquid
  • cpe:2.3:a:squid:squid:2.0.patch1:*:*:*:*:*:*:* Versions 2.0.patch1 Vulnerable ·Squid
  • cpe:2.3:a:squid:squid:2.0.patch2:*:*:*:*:*:*:* Versions 2.0.patch2 Vulnerable ·Squid
  • cpe:2.3:a:squid:squid:2.0.pre1:*:*:*:*:*:*:* Versions 2.0.pre1 Vulnerable ·Squid
  • cpe:2.3:a:squid:squid:2.0.release:*:*:*:*:*:*:* Versions 2.0.release Vulnerable ·Squid
  • cpe:2.3:a:squid:squid:2.1.patch1:*:*:*:*:*:*:* Versions 2.1.patch1 Vulnerable ·Squid
  • cpe:2.3:a:squid:squid:2.1.patch2:*:*:*:*:*:*:* Versions 2.1.patch2 Vulnerable ·Squid
  • cpe:2.3:a:squid:squid:2.1.pre1:*:*:*:*:*:*:* Versions 2.1.pre1 Vulnerable ·Squid
  • cpe:2.3:a:squid:squid:2.1.pre3:*:*:*:*:*:*:* Versions 2.1.pre3 Vulnerable ·Squid
  • cpe:2.3:a:squid:squid:2.1.pre4:*:*:*:*:*:*:* Versions 2.1.pre4 Vulnerable ·Squid
  • cpe:2.3:a:squid:squid:2.1.release:*:*:*:*:*:*:* Versions 2.1.release Vulnerable ·Squid
Show 28 more CPE
CPEVersionsRoleVendor
cpe:2.3:a:squid:squid:2.2.devel3:*:*:*:*:*:*:*2.2.devel3VulnerableSquid
cpe:2.3:a:squid:squid:2.2.devel4:*:*:*:*:*:*:*2.2.devel4VulnerableSquid
cpe:2.3:a:squid:squid:2.2.pre1:*:*:*:*:*:*:*2.2.pre1VulnerableSquid
cpe:2.3:a:squid:squid:2.2.pre2:*:*:*:*:*:*:*2.2.pre2VulnerableSquid
cpe:2.3:a:squid:squid:2.2.stable1:*:*:*:*:*:*:*2.2.stable1VulnerableSquid
cpe:2.3:a:squid:squid:2.2.stable2:*:*:*:*:*:*:*2.2.stable2VulnerableSquid
cpe:2.3:a:squid:squid:2.2.stable3:*:*:*:*:*:*:*2.2.stable3VulnerableSquid
cpe:2.3:a:squid:squid:2.2.stable4:*:*:*:*:*:*:*2.2.stable4VulnerableSquid
cpe:2.3:a:squid:squid:2.2.stable5:*:*:*:*:*:*:*2.2.stable5VulnerableSquid
cpe:2.3:a:squid:squid:2.3.devel2:*:*:*:*:*:*:*2.3.devel2VulnerableSquid
cpe:2.3:a:squid:squid:2.3.devel3:*:*:*:*:*:*:*2.3.devel3VulnerableSquid
cpe:2.3:a:squid:squid:2.3.stable1:*:*:*:*:*:*:*2.3.stable1VulnerableSquid
cpe:2.3:a:squid:squid:2.3.stable2:*:*:*:*:*:*:*2.3.stable2VulnerableSquid
cpe:2.3:a:squid:squid:2.3.stable3:*:*:*:*:*:*:*2.3.stable3VulnerableSquid
cpe:2.3:a:squid:squid:2.3.stable4:*:*:*:*:*:*:*2.3.stable4VulnerableSquid
cpe:2.3:a:squid:squid:2.3.stable5:*:*:*:*:*:*:*2.3.stable5VulnerableSquid
cpe:2.3:a:squid:squid:2.4.stable1:*:*:*:*:*:*:*2.4.stable1VulnerableSquid
cpe:2.3:a:squid:squid:2.4.stable2:*:*:*:*:*:*:*2.4.stable2VulnerableSquid
cpe:2.3:a:squid:squid:2.4.stable3:*:*:*:*:*:*:*2.4.stable3VulnerableSquid
cpe:2.3:a:squid:squid:2.4.stable4:*:*:*:*:*:*:*2.4.stable4VulnerableSquid
cpe:2.3:a:squid:squid:2.4.stable6:*:*:*:*:*:*:*2.4.stable6VulnerableSquid
cpe:2.3:a:squid:squid:2.4.stable7:*:*:*:*:*:*:*2.4.stable7VulnerableSquid
cpe:2.3:a:squid:squid:2.5.stable1:*:*:*:*:*:*:*2.5.stable1VulnerableSquid
cpe:2.3:a:squid:squid:2.5.stable2:*:*:*:*:*:*:*2.5.stable2VulnerableSquid
cpe:2.3:a:squid:squid:2.5.stable3:*:*:*:*:*:*:*2.5.stable3VulnerableSquid
cpe:2.3:a:squid:squid:2.5.stable4:*:*:*:*:*:*:*2.5.stable4VulnerableSquid
cpe:2.3:a:squid:squid:2.5.stable5:*:*:*:*:*:*:*2.5.stable5VulnerableSquid
cpe:2.3:a:squid:squid:2.5.stable6:*:*:*:*:*:*:*2.5.stable6VulnerableSquid
  • cpe:2.3:a:squid:squid:2.2.devel3:*:*:*:*:*:*:* Versions 2.2.devel3 Vulnerable ·Squid
  • cpe:2.3:a:squid:squid:2.2.devel4:*:*:*:*:*:*:* Versions 2.2.devel4 Vulnerable ·Squid
  • cpe:2.3:a:squid:squid:2.2.pre1:*:*:*:*:*:*:* Versions 2.2.pre1 Vulnerable ·Squid
  • cpe:2.3:a:squid:squid:2.2.pre2:*:*:*:*:*:*:* Versions 2.2.pre2 Vulnerable ·Squid
  • cpe:2.3:a:squid:squid:2.2.stable1:*:*:*:*:*:*:* Versions 2.2.stable1 Vulnerable ·Squid
  • cpe:2.3:a:squid:squid:2.2.stable2:*:*:*:*:*:*:* Versions 2.2.stable2 Vulnerable ·Squid
  • cpe:2.3:a:squid:squid:2.2.stable3:*:*:*:*:*:*:* Versions 2.2.stable3 Vulnerable ·Squid
  • cpe:2.3:a:squid:squid:2.2.stable4:*:*:*:*:*:*:* Versions 2.2.stable4 Vulnerable ·Squid
  • cpe:2.3:a:squid:squid:2.2.stable5:*:*:*:*:*:*:* Versions 2.2.stable5 Vulnerable ·Squid
  • cpe:2.3:a:squid:squid:2.3.devel2:*:*:*:*:*:*:* Versions 2.3.devel2 Vulnerable ·Squid
  • cpe:2.3:a:squid:squid:2.3.devel3:*:*:*:*:*:*:* Versions 2.3.devel3 Vulnerable ·Squid
  • cpe:2.3:a:squid:squid:2.3.stable1:*:*:*:*:*:*:* Versions 2.3.stable1 Vulnerable ·Squid
  • cpe:2.3:a:squid:squid:2.3.stable2:*:*:*:*:*:*:* Versions 2.3.stable2 Vulnerable ·Squid
  • cpe:2.3:a:squid:squid:2.3.stable3:*:*:*:*:*:*:* Versions 2.3.stable3 Vulnerable ·Squid
  • cpe:2.3:a:squid:squid:2.3.stable4:*:*:*:*:*:*:* Versions 2.3.stable4 Vulnerable ·Squid
  • cpe:2.3:a:squid:squid:2.3.stable5:*:*:*:*:*:*:* Versions 2.3.stable5 Vulnerable ·Squid
  • cpe:2.3:a:squid:squid:2.4.stable1:*:*:*:*:*:*:* Versions 2.4.stable1 Vulnerable ·Squid
  • cpe:2.3:a:squid:squid:2.4.stable2:*:*:*:*:*:*:* Versions 2.4.stable2 Vulnerable ·Squid
  • cpe:2.3:a:squid:squid:2.4.stable3:*:*:*:*:*:*:* Versions 2.4.stable3 Vulnerable ·Squid
  • cpe:2.3:a:squid:squid:2.4.stable4:*:*:*:*:*:*:* Versions 2.4.stable4 Vulnerable ·Squid
  • cpe:2.3:a:squid:squid:2.4.stable6:*:*:*:*:*:*:* Versions 2.4.stable6 Vulnerable ·Squid
  • cpe:2.3:a:squid:squid:2.4.stable7:*:*:*:*:*:*:* Versions 2.4.stable7 Vulnerable ·Squid
  • cpe:2.3:a:squid:squid:2.5.stable1:*:*:*:*:*:*:* Versions 2.5.stable1 Vulnerable ·Squid
  • cpe:2.3:a:squid:squid:2.5.stable2:*:*:*:*:*:*:* Versions 2.5.stable2 Vulnerable ·Squid
  • cpe:2.3:a:squid:squid:2.5.stable3:*:*:*:*:*:*:* Versions 2.5.stable3 Vulnerable ·Squid
  • cpe:2.3:a:squid:squid:2.5.stable4:*:*:*:*:*:*:* Versions 2.5.stable4 Vulnerable ·Squid
  • cpe:2.3:a:squid:squid:2.5.stable5:*:*:*:*:*:*:* Versions 2.5.stable5 Vulnerable ·Squid
  • cpe:2.3:a:squid:squid:2.5.stable6:*:*:*:*:*:*:* Versions 2.5.stable6 Vulnerable ·Squid

Remediation

Red Hat 2 advisories

  • RHSA-2005:060 Released 2005-02-15 · Red Hat rating Important
    squid security update
    • Red Hat Enterprise Linux AS version 4 squid-7:2.5.STABLE6-3.4E.3, squid-7:2.5.STABLE6-3.4E.3.i386, squid-7:2.5.STABLE6-3.4E.3.ia64 +1
    • Red Hat Enterprise Linux Desktop version 4 squid-7:2.5.STABLE6-3.4E.3, squid-7:2.5.STABLE6-3.4E.3.i386
    • Red Hat Enterprise Linux ES version 4 squid-7:2.5.STABLE6-3.4E.3, squid-7:2.5.STABLE6-3.4E.3.i386, squid-7:2.5.STABLE6-3.4E.3.ia64
    • Red Hat Enterprise Linux WS version 4 squid-7:2.5.STABLE6-3.4E.3, squid-7:2.5.STABLE6-3.4E.3.i386, squid-7:2.5.STABLE6-3.4E.3.ia64
  • RHSA-2005:061 Released 2005-02-11 · Red Hat rating Important
    squid security update
    • Red Hat Desktop version 3 squid-7:2.5.STABLE3-6.3E.7, squid-7:2.5.STABLE3-6.3E.7.i386
    • Red Hat Enterprise Linux AS version 3 squid-7:2.5.STABLE3-6.3E.7, squid-7:2.5.STABLE3-6.3E.7.i386, squid-7:2.5.STABLE3-6.3E.7.ia64 +1
    • Red Hat Enterprise Linux ES version 3 squid-7:2.5.STABLE3-6.3E.7, squid-7:2.5.STABLE3-6.3E.7.i386, squid-7:2.5.STABLE3-6.3E.7.ia64
    • Red Hat Enterprise Linux WS version 3 squid-7:2.5.STABLE3-6.3E.7, squid-7:2.5.STABLE3-6.3E.7.i386, squid-7:2.5.STABLE3-6.3E.7.ia64

Vendor assessments

Red Hat

Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Desktop version 3Fixed RHSA-2005:061
Red Hat Enterprise Linux AS version 3Fixed RHSA-2005:061
Red Hat Enterprise Linux AS version 4Fixed RHSA-2005:060
Red Hat Enterprise Linux Desktop version 4Fixed RHSA-2005:060
Red Hat Enterprise Linux ES version 3Fixed RHSA-2005:061
Red Hat Enterprise Linux ES version 4Fixed RHSA-2005:060
Red Hat Enterprise Linux WS version 3Fixed RHSA-2005:061
Red Hat Enterprise Linux WS version 4Fixed RHSA-2005:060

Timeline

  1. 2026-10-02 Threatist record created from CVE-2005-0173
  2. 2026-10-03 Alias added: GHSA-2r4j-x5mr-ch9c

References

Patch 8

Advisory 2

Other 3

  • TI-2009-00458 Squid 2.7 to 2.7.STABLE5, 3.0 to 3.0.STABLE12, and 3.1 to 3.1.0.4 allows remote attackers… CVSS 2.0MEDIUM 5.0
  • TI-2005-00207 The httpProcessReplyHeader function in http.c for Squid 2.5-STABLE7 and earlier does not… CVSS 2.0MEDIUM 5.0
  • TI-2005-00080 The WCCP message parsing code in Squid 2.5.STABLE7 and earlier allows remote attackers to… CVSS 2.0MEDIUM 5.0
  • TI-2005-00143 Squid 2.5 up to 2.5.STABLE7 allows remote attackers to poison the cache or conduct… CVSS 2.0MEDIUM 5.0
  • TI-2005-00404 Squid 2.5.STABLE8 and earlier allows remote attackers to cause a denial of service… CVSS 2.0MEDIUM 5.0
  • TI-2005-00162 Squid 2.5, when processing the configuration file, parses empty Access Control Lists… CVSS 2.0HIGH 10.0
See all 36 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences