CVE-2023-39915Network attack vector

Route-origin validation outage via malformed RPKI decoding

Published Sep 13, 2023 · Updated Sep 12, 2024

Denial of service in NLnet Labs Routinator 0.12.1 and earlier allows remote attackers to crash validation via malformed RPKI objects. The bcder decoder fails to validate nested lengths, truncated primitive or tag data, bit strings, and object identifiers before operations that panic instead of returning decoding errors. A repository publisher can trigger the crash by supplying a crafted object that Routinator processes, remotely disabling route-origin validation.

CVSS severity7.5
High
EPSS probability0.62%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in NLnet Labs Routinator 0.12.1 and earlier allows remote attackers to crash validation via malformed RPKI objects. The bcder decoder fails to validate nested lengths, truncated primitive or tag data, bit strings, and object identifiers before operations that panic instead of returning decoding errors. A repository publisher can trigger the crash by supplying a crafted object that Routinator processes, remotely disabling route-origin validation.

The record

CVE
CVE-2023-39915
Published
Sep 13, 2023
Updated
Sep 12, 2024
Vendor
NLnet Labs
Product
Routinator
Classifications
CWE-240, CWE-232, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 13, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 12, 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=* <0.12.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

NLnet Labs · Routinatorversion=* <0.12.2

Published CVSS scores

7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5NLnet LabsCVSS: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 exploitUnconfirmed

Weakness, pattern, technique

CWE-240Improper Handling of Inconsistent Structural Elements
CWE-232Improper Handling of Undefined Values
T1499.004Application or System Exploitation

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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