CVE-2024-50597Network attack vector

Service interruption via HTTP PUT integer underflow

Published Apr 2, 2025 · Updated Nov 3, 2025

Integer underflow in STMicroelectronics STM32 Azure RTOS packages allows remote authenticated users to exhaust file-system resources via HTTP PUT. The NetX Duo Component HTTP Server subtracts the request-body byte count from an unsigned Content-Length value without ensuring the body is no larger, wrapping the remainder to 0xffffffff. Access to the HTTP PUT path is required; continued data transmission then fills the target file system and interrupts service.

CVSS severity4.3
Medium
EPSS probability0.76%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer underflow in STMicroelectronics STM32 Azure RTOS packages allows remote authenticated users to exhaust file-system resources via HTTP PUT. The NetX Duo Component HTTP Server subtracts the request-body byte count from an unsigned Content-Length value without ensuring the body is no larger, wrapping the remainder to 0xffffffff. Access to the HTTP PUT path is required; continued data transmission then fills the target file system and interrupts service.

The record

CVE
CVE-2024-50597
Published
Apr 2, 2025
Updated
Nov 3, 2025
Vendor
STMicroelectronics
Product
X-CUBE-AZRTOS-G4
Classifications
CWE-191, T1499.003
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 2, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 3, 2025Record 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=2.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

STMicroelectronics · X-CUBE-AZRTOS-G4version=2.0.0
STMicroelectronics · X-CUBE-AZRTOS-WLversion=2.0.0
STMicroelectronics · X-CUBE-AZRTOS-L5version=2.0.0
STMicroelectronics · X-CUBE-AZRTOS-F4version=1.1.0
STMicroelectronics · X-CUBE-AZRTOS-G0version=1.1.0
STMicroelectronics · X-CUBE-AZRT-H7RSversion=1.0.0
STMicroelectronics · X-CUBE-AZRTOS-L4version=2.0.0
STMicroelectronics · X-CUBE-AZRTOS-H7version=3.3.0
STMicroelectronics · X-CUBE-AZRTOS-WBversion=2.0.0
STMicroelectronics · X-CUBE-AZRTOS-F7version=1.1.0

Published CVSS scores

4.3TalosCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-191Integer Underflow (Wrap or Wraparound)
T1499.003Application Exhaustion Flood

Public exploit references

No public exploit references are available in this record.

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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