CVE-2024-27567Public exploitNetwork attack vector

Authenticated router crash via oversized PPTP address

Published Mar 1, 2024 · Updated Aug 2, 2024

Stack-based buffer overflow in Shenzhen Libituo LBT-T300-T390 Firmware 2.2.1.8 allows remote authenticated users to crash the router. The config_vpn_pptp function fails to constrain the vpn_client_ip value obtained from a PPTP configuration request before placing it in stack storage. Reaching the flaw requires authenticated access to the VPN configuration interface, and exploitation interrupts the router service.

CVSS severity6.5
Medium
EPSS probability0.59%
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 Shenzhen Libituo LBT-T300-T390 Firmware 2.2.1.8 allows remote authenticated users to crash the router. The config_vpn_pptp function fails to constrain the vpn_client_ip value obtained from a PPTP configuration request before placing it in stack storage. Reaching the flaw requires authenticated access to the VPN configuration interface, and exploitation interrupts the router service.

The record

CVE
CVE-2024-27567
Published
Mar 1, 2024
Updated
Aug 2, 2024
Vendor
Shenzhen Libituo Technology Co., Ltd.
Product
LBT-T300-T390 Firmware
Classifications
CWE-121, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 1, 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=2.2.1.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Shenzhen Libituo Technology Co., Ltd. · LBT-T300-T390 Firmwareversion=2.2.1.8

Published CVSS scores

6.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
T1499.004Application or System Exploitation

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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