CVE-2023-34924Public exploitNetwork attack vector

Web-service crash via unchecked POST parameter

Published Jun 26, 2023 · Updated Dec 3, 2024

Stack overflow in H3C Magic B1STW B1STV100R012 allows remote attackers to crash its web service via a crafted POST request. SetAPInfoById passes the request-body param value to sscanf without checking its length, overwriting a stack buffer that lacks canary protection. No authentication or user interaction is required, and the demonstrated consequence is a web-service crash followed by restart.

CVSS severity7.5
High
EPSS probability0.91%
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

Stack overflow in H3C Magic B1STW B1STV100R012 allows remote attackers to crash its web service via a crafted POST request. SetAPInfoById passes the request-body param value to sscanf without checking its length, overwriting a stack buffer that lacks canary protection. No authentication or user interaction is required, and the demonstrated consequence is a web-service crash followed by restart.

The record

CVE
CVE-2023-34924
Published
Jun 26, 2023
Updated
Dec 3, 2024
Vendor
New H3C Technologies Co., Ltd.
Product
H3C Magic B1STW
Classifications
CWE-787, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 26, 2023CVE publishedPublication date reported by the CVE source.
  2. Dec 3, 2024Record 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=B1STV100R012

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

New H3C Technologies Co., Ltd. · H3C Magic B1STWversion=B1STV100R012

Published CVSS scores

7.5NIST NVDCVSS: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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1499.004Endpoint Denial of Service: Application or System Exploitation

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