CyberSecBulletin
CVE-2024-50596NVD status: Modified

X-CUBE-AZRT-H7RS: Integer Underflow (Wrap or Wraparound)

Published Updated By the CyberSecBulletin desk

CVE-2024-50596 is a high-severity integer underflow (wrap or wraparound) vulnerability in X-CUBE-AZRT-H7RS from STMicroelectronics, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected X-CUBE-AZRT-H7RS versions: 1.0.0. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.79% chance of exploitation within 30 days, higher than 57% of scored CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Check which version of X-CUBE-AZRT-H7RS you run against the affected versions below, and install the vendor's latest release.
  2. Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.

Affected products and versions

VendorProductAffected versionsFixed in
STMicroelectronicsX-CUBE-AZRT-H7RS1.0.0Not stated
STMicroelectronicsX-CUBE-AZRTOS-F41.1.0Not stated
STMicroelectronicsX-CUBE-AZRTOS-F71.1.0Not stated
STMicroelectronicsX-CUBE-AZRTOS-G01.1.0Not stated
STMicroelectronicsX-CUBE-AZRTOS-G42.0.0Not stated
STMicroelectronicsX-CUBE-AZRTOS-H73.3.0Not stated
STMicroelectronicsX-CUBE-AZRTOS-L42.0.0Not stated
STMicroelectronicsX-CUBE-AZRTOS-L52.0.0Not stated
STMicroelectronicsX-CUBE-AZRTOS-WB2.0.0Not stated
STMicroelectronicsX-CUBE-AZRTOS-WL2.0.0Not stated

Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
NetworkCan be exploited remotely over a network, including the internet.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
NoneNo account or login is needed.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
NoneNo data is disclosed.
Integrity
NoneNothing can be modified.
Availability
HighThe component can be taken down completely.

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. Scored by NVD.

Scoring systemScoreSeverityScored by
CVSS 3.14.3MediumCNA (cisco.com)
CVSS 3.17.5HighNVD

Official description

An integer underflow vulnerability exists in the HTTP server PUT request functionality of STMicroelectronics X-CUBE-AZRTOS-WL 2.0.0. A specially crafted network packet can lead to denial of service. An attacker can send a malicious packet to trigger this vulnerability.This vulnerability affects the NetX Duo Web Component HTTP Server implementation which can be found in x-cube-azrtos-f7\Middlewares\ST\netxduo\addons\web\nx_web_http_server.c

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Integer Underflow (Wrap or Wraparound)

The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result.

More Integer Underflow (Wrap or Wraparound) vulnerabilities (CWE-191)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
  3. Record last changed materially (score, affected products, status or references).

References

Technical write-ups (may include proof of concept)

Other vulnerabilities in X-CUBE-AZRT-H7RS

All X-CUBE-AZRT-H7RS vulnerabilities

Recent Integer Underflow (Wrap or Wraparound) vulnerabilities

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