CVE-2024-29149Public exploit

Root access via post-verification firmware replacement

Published May 7, 2024 · Updated Aug 2, 2024

A firmware-update race in Alcatel-Lucent Enterprise ALE DeskPhones allows local users to install malicious firmware and gain root access. The update workflow verifies a world-writable image in /tmp, releases it without retaining a lock or file handle, and later installs the same path after its contents can be overwritten. Exploitation requires the low-privileged admin shell through authenticated SSH or physical UART access and initiation of an update with valid firmware.

CVSS severity7.4
High
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A firmware-update race in Alcatel-Lucent Enterprise ALE DeskPhones allows local users to install malicious firmware and gain root access. The update workflow verifies a world-writable image in /tmp, releases it without retaining a lock or file handle, and later installs the same path after its contents can be overwritten. Exploitation requires the low-privileged admin shell through authenticated SSH or physical UART access and initiation of an update with valid firmware.

The record

CVE
CVE-2024-29149
Published
May 7, 2024
Updated
Aug 2, 2024
Vendor
Alcatel-Lucent Enterprise
Product
ALE-300 Enterprise DeskPhone
Classifications
CWE-367, CAPEC-29, T1542.002
Attack vector
physical
Privileges
authenticated

Timeline

How it unfolded

  1. May 7, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=-

What conditions does exploitation require?

Attack vectorphysical
Required privilegesauthenticated

What is affected?

Alcatel-Lucent Enterprise · ALE-300 Enterprise DeskPhoneversion=-
Alcatel-Lucent Enterprise · ALE-20h Essential DeskPhoneversion=-
Alcatel-Lucent Enterprise · ALE-400 Enterprise DeskPhoneversion=-
Alcatel-Lucent Enterprise · ALE-500 Enterprise DeskPhoneversion=-
Alcatel-Lucent Enterprise · ALE-30 Essential DeskPhoneversion=-
Alcatel-Lucent Enterprise · ALE-30h Essential DeskPhoneversion=-
Alcatel-Lucent Enterprise · ALE-20 Essential DeskPhoneversion=-

Published CVSS scores

7.4CISA ADPCVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:C/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.

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No observations available

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

Weakness, pattern, technique

CWE-367Time-of-check Time-of-use (TOCTOU) Race Condition
CAPEC-29Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions
T1542.002Pre-OS Boot Component Firmware

Public exploit references

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

Technologies

Your stack

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Your stack

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