CVE-2023-29929Public exploitNetwork attack vector

Remote appliance crash via DNS character expansion

Published Aug 21, 2024 · Updated Jul 5, 2026

Buffer overflow in Progress LoadMaster before 7.2.60.0 allows remote attackers to crash the appliance via a crafted DNS request. The libkemplink.so isreverse and locate_fqdn routines escape special or Unicode DNS-name characters into a 256-byte buffer, allowing expansion past its bounds. The target must expose its DNS service over TCP or UDP; one malicious query immediately crashes the appliance and interrupts traffic handling.

CVSS severity7.5
High
EPSS probability0.68%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in Progress LoadMaster before 7.2.60.0 allows remote attackers to crash the appliance via a crafted DNS request. The libkemplink.so isreverse and locate_fqdn routines escape special or Unicode DNS-name characters into a 256-byte buffer, allowing expansion past its bounds. The target must expose its DNS service over TCP or UDP; one malicious query immediately crashes the appliance and interrupts traffic handling.

The record

CVE
CVE-2023-29929
Published
Aug 21, 2024
Updated
Jul 5, 2026
Vendor
Progress Software Corporation
Product
LoadMaster
Classifications
CWE-787, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 21, 2024CVE publishedPublication date reported by the CVE source.
  2. Jul 5, 2026Record 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=0 <7.2.60.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Progress Software Corporation · LoadMasterversion=0 <7.2.60.0

Published CVSS scores

7.5CISA-ADPCVSS: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.

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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 exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
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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