Skip to content
Fencer Vulns
high 8.6

CVE-2022-41318 json

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

published 2022-12-25 3 y ago modified 2026-06-17 4 mo ago also EUVD-2022-44526

cvss
8.6
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
3.1%
EPSS 3.1% chance of exploitation in 30 days, percentile 87%
public exploits
0
none known

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.

Patch / fix

  • squid-cache squid 5.7
  • squid Debian 14, Debian 13, Debian 12 5.7-1

debian advisories DEBIAN-CVE-2022-41318

  • squid Ubuntu 20.04 LTS 4.10-1ubuntu1.7
  • squid Ubuntu 22.04 LTS 5.2-1ubuntu4.2
  • squid3 Ubuntu 18.04 LTS 3.5.27-1ubuntu1.14
  • squid3 Ubuntu Pro 16.04 LTS 3.5.12-1ubuntu7.16+esm3

ubuntu advisories UBUNTU-CVE-2022-41318

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • squid RHEL 9 7:5.2-1.el9_0.2
  • squid RHEL 7 7:3.5.20-17.el7_9.8
  • squid-sysvinit RHEL 7 7:3.5.20-17.el7_9.8
  • squid-migration-script RHEL 7 7:3.5.20-17.el7_9.8
  • libecap RHEL 8, RHEL 8.4 EUS, RHEL 8.2 EUS +1 more 1.0.1-2.module+el8.1.0+4044+36416a77
  • squid RHEL 8 7:4.15-3.module+el8.6.0+16749+7b6feaf0.2
  • squid RHEL 8.2 EUS 7:4.4-8.module+el8.2.0+16757+26d6b59c.5
  • squid RHEL 8.4 EUS 7:4.11-4.module+el8.4.0+16750+7556a224.4

red hat advisories RHSA-2022:6839RHSA-2022:6815RHSA-2022:6777RHSA-2022:6776RHSA-2022:6775RHSA-2022:6774

  • squid SLES for SAP 15 SP2, SLES for SAP 15 SP1, SLES for SAP 15 +18 more 4.17-150000.5.35.1
  • squid SLES for SAP 12 SP4, SLES 12 SP4-LTSS, SLES 12 SP3-BCL +3 more 3.5.21-26.38.1
  • squid SLES for SAP 12 SP5, SLES 12 SP5 4.17-4.27.1
  • squid SLE Module for Server Applications 15 SP4, openSUSE Leap 15.4 5.7-150400.3.6.1

suse advisories SUSE-SU-2022:3596-1SUSE-SU-2022:3533-1SUSE-SU-2022:3532-1SUSE-SU-2022:3531-1

  • squid openSUSE Tumbleweed 5.7-2.1

opensuse advisories openSUSE-SU-2024:12364-1

  • squid AlmaLinux 9 7:5.2-1.el9_0.2
  • squid AlmaLinux 8 7:4.15-3.module_el8.6.0+3275+7a670b72.2
  • libecap AlmaLinux 8 1.0.1-2.module_el8.6.0+2741+01592ae8
  • libecap AlmaLinux 8 1.0.1-2.module_el8.6.0+3048+383bc947

almalinux advisories ALSA-2022:6839ALSA-2022:6775

  • squid Rocky Linux 9 7:5.2-1.el9_0.2
  • squid Rocky Linux 8 7:4.15-3.module+el8.6.0+1044+67ab5d0a.2
  • libecap Rocky Linux 8 1.0.1-2.module+el8.4.0+404+316a0dc5

rocky linux advisories RLSA-2022:6839RLSA-2022:6775

  • squid Alpine 3.16, Alpine 3.15 5.2-r1

alpine advisories ALPINE-CVE-2022-41318

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • squid Arch Linux 5.7-1

arch linux advisories AVG-2816

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2022-41318 updated cvss 8.6

squid: buffer-over-read in SSPI and SMB authentication

  • Red Hat Enterprise Linux 6 squid, squid34
    affected: workaround, no fix planned “Disable use of the vulnerable authentication scheme.”
  • Red Hat Enterprise Linux AppStream (v. 8) libecap 1.0.1-2.module+el8.1.0+4044+36416a77, squid 4.15-3.module+el8.6.0+16749+7b6feaf0.2
    fixed: vendor fix “Disable use of the vulnerable authentication scheme.” RHSA-2022:6775
  • Red Hat Enterprise Linux AppStream (v. 9) squid 5.2-1.el9_0.2
    fixed: vendor fix “Disable use of the vulnerable authentication scheme.” RHSA-2022:6839
  • Red Hat Enterprise Linux AppStream E4S (v. 8.1) squid 4.4-8.module+el8.1.0+16758+65e5269e.5, libecap 1.0.1-2.module+el8.1.0+4044+36416a77
    fixed: vendor fix “Disable use of the vulnerable authentication scheme.” RHSA-2022:6774
  • Red Hat Enterprise Linux AppStream EUS (v. 8.2) squid 4.4-8.module+el8.2.0+16757+26d6b59c.5, libecap 1.0.1-2.module+el8.1.0+4044+36416a77
    fixed: vendor fix “Disable use of the vulnerable authentication scheme.” RHSA-2022:6777
  • Red Hat Enterprise Linux AppStream EUS (v.8.4) libecap 1.0.1-2.module+el8.1.0+4044+36416a77, squid 4.11-4.module+el8.4.0+16750+7556a224.4
    fixed: vendor fix “Disable use of the vulnerable authentication scheme.” RHSA-2022:6776
  • Red Hat Enterprise Linux Server (v. 7) squid 3.5.20-17.el7_9.8, squid-migration-script 3.5.20-17.el7_9.8 Red Hat Enterprise Linux Server Optional (v. 7) squid-sysvinit 3.5.20-17.el7_9.8 Red Hat Enterprise Linux Workstation (v. 7) squid 3.5.20-17.el7_9.8, squid-migration-script 3.5.20-17.el7_9.8 Red Hat Enterprise Linux Workstation Optional (v. 7) squid-sysvinit 3.5.20-17.el7_9.8
    fixed: vendor fix “Disable use of the vulnerable authentication scheme.” RHSA-2022:6815

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
18 mo ago

Exploit prediction

3.08% chance of exploitation in the next 30 days, higher than 87% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 8.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
NVD 3.1 8.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
CNA 3.1 8.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

Classification

Weakness
  • CWE-190 Integer Overflow or Wraparound

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.