CVE-2022-41318· NVD / CVE Program· CNA mitre

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

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.

HighCVSS 8.6 · v3.1—No exploit Fix available

Published: Dec 25, 2022
Updated: Jun 17, 2026
EPSS: 3.0% · 87th percentile
CWE: CWE-190

Follow this CVE

Report tools

JSON

Action score

Monitor

Low priority for now.

CVSS: 34 / 40 · 8.6 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 1 / 30 · 3.0%

CISA SSVC decision

Exploitation: none
Automatable: no
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

We use this product, ask for help

Affected systems

Vendor	Product	CPE
squid-cache	squid	cpe:2.3:a:squid-cache:squid

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

squid-cache squid2.5 and later · before 5.7

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
AlmaLinux:8	libecap	before 1.0.1-2.module_el8.6.0+2741+01592ae8	1.0.1-2.module_el8.6.0+2741+01592ae8
AlmaLinux:8	libecap	before 1.0.1-2.module_el8.6.0+3048+383bc947	1.0.1-2.module_el8.6.0+3048+383bc947
AlmaLinux:8	libecap-devel	before 1.0.1-2.module_el8.6.0+2741+01592ae8	1.0.1-2.module_el8.6.0+2741+01592ae8
AlmaLinux:8	libecap-devel	before 1.0.1-2.module_el8.6.0+3048+383bc947	1.0.1-2.module_el8.6.0+3048+383bc947
AlmaLinux:8	squid	before 7:4.15-3.module_el8.6.0+3275+7a670b72.2	7:4.15-3.module_el8.6.0+3275+7a670b72.2
AlmaLinux:9	squid	before 7:5.2-1.el9_0.2	7:5.2-1.el9_0.2
Alpine:v3.15	squid	from 2.5 · before 5.2-r1	5.2-r1
Debian:10	squid	before 4.6-1+deb10u8	4.6-1+deb10u8
Debian:11	squid	before 4.13-10+deb11u2	4.13-10+deb11u2
Debian:12	squid	before 5.7-1	5.7-1
openSUSE:Tumbleweed	squid	before 5.7-2.1	5.7-2.1
Red Hat:enterprise_linux:7::server	squid	before 7:3.5.20-17.el7_9.8	7:3.5.20-17.el7_9.8
Red Hat:enterprise_linux:7::server	squid-debuginfo	before 7:3.5.20-17.el7_9.8	7:3.5.20-17.el7_9.8
Red Hat:enterprise_linux:7::server	squid-migration-script	before 7:3.5.20-17.el7_9.8	7:3.5.20-17.el7_9.8
Red Hat:enterprise_linux:7::server	squid-sysvinit	before 7:3.5.20-17.el7_9.8	7:3.5.20-17.el7_9.8
Red Hat:enterprise_linux:8::appstream	squid	before 7:4.15-3.module+el8.6.0+16749+7b6feaf0.2	7:4.15-3.module+el8.6.0+16749+7b6feaf0.2
Red Hat:enterprise_linux:8::appstream	squid-debuginfo	before 7:4.15-3.module+el8.6.0+16749+7b6feaf0.2	7:4.15-3.module+el8.6.0+16749+7b6feaf0.2
Red Hat:enterprise_linux:8::appstream	squid-debugsource	before 7:4.15-3.module+el8.6.0+16749+7b6feaf0.2	7:4.15-3.module+el8.6.0+16749+7b6feaf0.2
Red Hat:enterprise_linux:9::appstream	squid	before 7:5.2-1.el9_0.2	7:5.2-1.el9_0.2
Red Hat:enterprise_linux:9::appstream	squid-debuginfo	before 7:5.2-1.el9_0.2	7:5.2-1.el9_0.2
Red Hat:enterprise_linux:9::appstream	squid-debugsource	before 7:5.2-1.el9_0.2	7:5.2-1.el9_0.2
Red Hat:rhel_e4s:8.1::appstream	libecap	before 0:1.0.1-2.module+el8.1.0+4044+36416a77	0:1.0.1-2.module+el8.1.0+4044+36416a77
Red Hat:rhel_e4s:8.1::appstream	libecap-debuginfo	before 0:1.0.1-2.module+el8.1.0+4044+36416a77	0:1.0.1-2.module+el8.1.0+4044+36416a77
Red Hat:rhel_e4s:8.1::appstream	libecap-debugsource	before 0:1.0.1-2.module+el8.1.0+4044+36416a77	0:1.0.1-2.module+el8.1.0+4044+36416a77

+19

Same product

squid-cache: all records

Other highest-scoring records for the same primary product.

CVE-2023-46847Squid: denial of service in http digest authentication
57Plan
CVE-2024-25617Denial of Service in HTTP Header parser in squid proxy
56Plan
CVE-2023-49285Denial of Service in HTTP Message Processing in Squid
56Plan
CVE-2021-31806An issue was discovered in Squid before 4.15 and 5.x before 5.0.6.
55Plan
CVE-2020-8450An issue was discovered in Squid before 4.10.
51Plan
CVE-2024-25111SQUID-2024:1 Denial of Service in HTTP Chunked Decoding
50Plan

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
n/a n/a	5.7 · description	Vendor (CNA)
almalinux:libecap	1.0.1-2.module_el8.6.0+2741+01592ae8 · AlmaLinux:8	Package registry (OSV)
almalinux:libecap-devel	1.0.1-2.module_el8.6.0+2741+01592ae8 · AlmaLinux:8	Package registry (OSV)
almalinux:squid	7:4.15-3.module_el8.6.0+3275+7a670b72.2 · AlmaLinux:8	Package registry (OSV)
alpine:squid	5.2-r1 · Alpine:v3.15	Package registry (OSV)
debian:squid	5.7-1 · Debian:12	Package registry (OSV)
opensuse:squid	5.7-150400.3.6.1 · openSUSE:Leap 15.4	Package registry (OSV)
red hat:libecap	0:1.0.1-2.module+el8.1.0+4044+36416a77 · Red Hat:rhel_e4s:8.1::appstream	Package registry (OSV)
red hat:libecap-debuginfo	0:1.0.1-2.module+el8.1.0+4044+36416a77 · Red Hat:rhel_e4s:8.1::appstream	Package registry (OSV)
red hat:libecap-debugsource	0:1.0.1-2.module+el8.1.0+4044+36416a77 · Red Hat:rhel_e4s:8.1::appstream	Package registry (OSV)
red hat:libecap-devel	0:1.0.1-2.module+el8.1.0+4044+36416a77 · Red Hat:rhel_e4s:8.1::appstream	Package registry (OSV)
red hat:squid	7:4.4-8.module+el8.1.0+16758+65e5269e.5 · Red Hat:rhel_e4s:8.1::appstream	Package registry (OSV)
red hat:squid-debuginfo	7:4.4-8.module+el8.1.0+16758+65e5269e.5 · Red Hat:rhel_e4s:8.1::appstream	Package registry (OSV)
red hat:squid-debugsource	7:4.4-8.module+el8.1.0+16758+65e5269e.5 · Red Hat:rhel_e4s:8.1::appstream	Package registry (OSV)
red hat:squid-migration-script	7:3.5.20-17.el7_9.8 · Red Hat:enterprise_linux:7::server	Package registry (OSV)
red hat:squid-sysvinit	7:3.5.20-17.el7_9.8 · Red Hat:enterprise_linux:7::server	Package registry (OSV)
rocky linux:libecap	0:1.0.1-2.module+el8.4.0+404+316a0dc5 · Rocky Linux:8	Package registry (OSV)
rocky linux:squid	7:4.15-3.module+el8.6.0+1044+67ab5d0a.2 · Rocky Linux:8	Package registry (OSV)
suse:squid	5.7-150400.3.6.1 · SUSE:Linux Enterprise Module for Server Applications 15 SP4	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
No account or password is required.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: high · data can be read
Integrity: none
Availability: none

Impact can extend beyond the vulnerable component (scope changes).

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Changed
Confidentiality impact: High
Integrity impact: None
Availability impact: None

Weakness class (CWE)

CWE-190 · Integer Overflow or Wraparound

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

Forced Integer OverflowCAPEC-92likelihood: High · High

ATT&CK techniques

—

Change log

Fix✗ → ✓Sep 28, 2026, 10:45 PM UTC

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records

Noroxi analysis

No Noroxi analysis for this record yet

We use this product, ask for help

Data sources and verification

CNA: mitre

CVE.org (CNA)Apr 14, 2025, 6:33 PM UTC
CISA ADPApr 14, 2025, 6:33 PM UTC
NVDJun 17, 2026, 1:03 AM UTC
FIRST EPSSOct 11, 2026, 12:00 AM UTC
OSV / GHSAOct 12, 2026, 3:22 AM UTC

Each line is when that source was last processed for this record.

You’re seeing every CVE. Add your stack to narrow the list down to the ones that affect you.

Add your stack