CVE-2023-24019Network attack vector

Memory corruption via unbounded HTTP status parsing

Published Jul 6, 2023 · Updated Mar 5, 2025

Stack-based buffer overflow in Milesight UR32L 32.3.0.5 allows remote attackers to corrupt memory via a crafted VPN-server response. The http_connection_readcb function parses an untrusted HTTP status message with an unbounded %s conversion into a 52-byte stack buffer. The Milesight VPN service must be enabled by an administrator, and a malicious server or man-in-the-middle position can overwrite adjacent stack data.

CVSS severity8.1
High
EPSS probability0.98%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in Milesight UR32L 32.3.0.5 allows remote attackers to corrupt memory via a crafted VPN-server response. The http_connection_readcb function parses an untrusted HTTP status message with an unbounded %s conversion into a 52-byte stack buffer. The Milesight VPN service must be enabled by an administrator, and a malicious server or man-in-the-middle position can overwrite adjacent stack data.

The record

CVE
CVE-2023-24019
Published
Jul 6, 2023
Updated
Mar 5, 2025
Vendor
Milesight
Product
UR32L
Classifications
CWE-120, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 6, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 5, 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=v32.3.0.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Milesight · UR32Lversion=v32.3.0.5

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.

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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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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