Read the docs
TI-2022-19815 Aliases CVE-2022-41318

A buffer over-read was discovered in libntlmauth in Squid 2.5 through 5.6.

Priority MEDIUM 43CWE-190Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · None · None
Fix status
Partial Red Hat: 9 fixed, 1 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat.

Summary

A buffer over-read was discovered in libntlmauth in Squid 2.5 through 5.6. Due to incorrect integer-overflow protection, the SSPI and SMB authentication helpers are vulnerable to reading unintended memory locations. In some configurations, cleartext credentials from these locations are sent to a client. This is fixed in 5.7.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.03084 87th percentileScored 2026-11-07
Fix Partial Red Hat: 6 advisoriesRed Hat: 9 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

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

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:*2.5 to before 5.7Vulnerablesquid-cache
  • cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:* Versions 2.5 to before 5.7 Vulnerable ·squid-cache

Remediation

Red Hat 6 advisories

  • RHSA-2022:6839 Released 2022-10-06 · Red Hat rating Important
    squid security update
    • Red Hat Enterprise Linux AppStream (v. 9) squid-7:5.2-1.el9_0.2
  • RHSA-2022:6815 Released 2022-10-05 · Red Hat rating Important
    squid security update
    • Red Hat Enterprise Linux Server (v. 7) squid-7:3.5.20-17.el7_9.8, squid-migration-script-7:3.5.20-17.el7_9.8
    • Red Hat Enterprise Linux Server Optional (v. 7) squid-sysvinit-7:3.5.20-17.el7_9.8
    • Red Hat Enterprise Linux Workstation (v. 7) squid-7:3.5.20-17.el7_9.8, squid-migration-script-7:3.5.20-17.el7_9.8
    • Red Hat Enterprise Linux Workstation Optional (v. 7) squid-sysvinit-7:3.5.20-17.el7_9.8
  • RHSA-2022:6775 Released 2022-10-04 · Red Hat rating Important
    squid:4 security update
    • Red Hat Enterprise Linux AppStream (v. 8) libecap-1.0.1-2.module+el8.1.0+4044+36416a77.aarch64::squid:4, libecap-1.0.1-2.module+el8.1.0+4044+36416a77.ppc64le::squid:4, libecap-1.0.1-2.module+el8.1.0+4044+36416a77.s390x::squid:4 +11
Show 3 more Red Hat advisories
  • RHSA-2022:6777 Released 2022-10-04 · Red Hat rating Important
    squid:4 security update
    • Red Hat Enterprise Linux AppStream EUS (v. 8.2) libecap-1.0.1-2.module+el8.1.0+4044+36416a77.aarch64::squid:4, libecap-1.0.1-2.module+el8.1.0+4044+36416a77.ppc64le::squid:4, libecap-1.0.1-2.module+el8.1.0+4044+36416a77.s390x::squid:4 +11
  • RHSA-2022:6776 Released 2022-10-04 · Red Hat rating Important
    squid:4 security update
    • Red Hat Enterprise Linux AppStream EUS (v.8.4) libecap-1.0.1-2.module+el8.1.0+4044+36416a77.aarch64::squid:4, libecap-1.0.1-2.module+el8.1.0+4044+36416a77.ppc64le::squid:4, libecap-1.0.1-2.module+el8.1.0+4044+36416a77.s390x::squid:4 +11
  • RHSA-2022:6774 Released 2022-10-04 · Red Hat rating Important
    squid:4 security update
    • Red Hat Enterprise Linux AppStream E4S (v. 8.1) libecap-1.0.1-2.module+el8.1.0+4044+36416a77.ppc64le::squid:4, libecap-1.0.1-2.module+el8.1.0+4044+36416a77.src::squid:4, libecap-1.0.1-2.module+el8.1.0+4044+36416a77.x86_64::squid:4 +5

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2022:6775
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2022:6839
Red Hat Enterprise Linux AppStream E4S (v. 8.1)Fixed RHSA-2022:6774
Red Hat Enterprise Linux AppStream EUS (v. 8.2)Fixed RHSA-2022:6777
Red Hat Enterprise Linux AppStream EUS (v.8.4)Fixed RHSA-2022:6776
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2022:6815
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2022:6815
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2022:6815
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2022:6815

Timeline

  1. 2026-10-02 Threatist record created from CVE-2022-41318

References

Patch 4

  • TI-2025-38486 Squid vulnerable to information disclosure via authentication credential leakage in error handling CVSS 3.1CRITICAL 10.0
  • TI-2024-16845 Denial of Service in HTTP Header parser in squid proxy CVSS 3.1HIGH 7.5
  • TI-2024-16566 SQUID-2024:1 Denial of Service in HTTP Chunked Decoding CVSS 3.1HIGH 8.6
  • TI-2023-26921 Denial of Service in HTTP Message Processing in Squid CVSS 3.1HIGH 8.6
  • TI-2023-27496 SQUID-2023:10 Denial of Service in HTTP Request parsing CVSS 3.1HIGH 8.6
  • TI-2023-25306 Squid: denial of service in http digest authentication CVSS 3.1HIGH 8.6
See all 110 →

Sources

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