CVE-2021-29507Network attack vector

Daemon crash via malformed numeric configuration values

Published May 28, 2021 · Updated Aug 3, 2024

Improper input validation in COVESA DLT Daemon 2.10.0 through 2.18.6 allows attackers to crash the daemon via a crafted dlt.conf. The option-file parser accepts trailing characters while scanning ring-buffer and FIFO sizes as unsigned integers, then uses the invalid values during buffer initialization. The attacker must cause the daemon to load the modified configuration, and the crash prevents dependent applications from generating DLT logs.

CVSS severity5.7
Medium
EPSS probability0.75%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in COVESA DLT Daemon 2.10.0 through 2.18.6 allows attackers to crash the daemon via a crafted dlt.conf. The option-file parser accepts trailing characters while scanning ring-buffer and FIFO sizes as unsigned integers, then uses the invalid values during buffer initialization. The attacker must cause the daemon to load the modified configuration, and the crash prevents dependent applications from generating DLT logs.

The record

CVE
CVE-2021-29507
Published
May 28, 2021
Updated
Aug 3, 2024
Vendor
COVESA
Product
DLT Daemon
Classifications
CWE-20, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 28, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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=> 2.10.0, <= 2.18.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

COVESA · DLT Daemonversion=> 2.10.0, <= 2.18.6

Published CVSS scores

5.7GitHub CNACVSS:3.1/AV:N/AC:L/PR:L/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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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