CVE-2023-45842Public exploitNetwork attack vector

Builder command execution via unhashed mxsldr download

Published Dec 5, 2023 · Updated Nov 4, 2025

Download integrity failure in Buildroot 2023.08.1 and dev commit 622698d7847 allows man-in-the-middle attackers to execute builder commands. The mxsldr package lacks a .hash file, so check-hash accepts its archive after the HTTPS source is forced onto the default HTTP backup site. Exploitation requires control of the network path and a build that fetches mxsldr; a malicious archive can run commands on the builder and alter generated files.

CVSS severity8.1
High
EPSS probability0.81%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Download integrity failure in Buildroot 2023.08.1 and dev commit 622698d7847 allows man-in-the-middle attackers to execute builder commands. The mxsldr package lacks a .hash file, so check-hash accepts its archive after the HTTPS source is forced onto the default HTTP backup site. Exploitation requires control of the network path and a build that fetches mxsldr; a malicious archive can run commands on the builder and alter generated files.

The record

CVE
CVE-2023-45842
Published
Dec 5, 2023
Updated
Nov 4, 2025
Vendor
Buildroot
Product
Buildroot
Classifications
CWE-494, T1557
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 5, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 4, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2023.08.1
  2. Affected versionversion=dev commit 622698d7847

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Buildroot · Buildrootversion=2023.08.1; version=dev commit 622698d7847

Published CVSS scores

8.1Cisco TalosCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-494Download of Code Without Integrity Check
T1557Adversary-in-the-Middle

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo