CVE-2024-45238Network attack vector

Remote validation crash via unchecked public-key pointer

Published Aug 24, 2024 · Updated Nov 3, 2025

NULL pointer dereference in FORT Validator before 1.6.3 allows remote attackers to crash validation via a malformed certificate. In validate_subject_public_key(), X509_PUBKEY_get0() can return NULL for a malformed subjectPublicKey, but affected builds pass that pointer to EVP_PKEY_get0_RSA() without checking it. Exploitation requires a malicious RPKI repository below a trusted Trust Anchor and a build linked to OpenSSL libcrypto before 3; the crash can interrupt Route Origin Validation.

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

What happened

NULL pointer dereference in FORT Validator before 1.6.3 allows remote attackers to crash validation via a malformed certificate. In validate_subject_public_key(), X509_PUBKEY_get0() can return NULL for a malformed subjectPublicKey, but affected builds pass that pointer to EVP_PKEY_get0_RSA() without checking it. Exploitation requires a malicious RPKI repository below a trusted Trust Anchor and a build linked to OpenSSL libcrypto before 3; the crash can interrupt Route Origin Validation.

The record

CVE
CVE-2024-45238
Published
Aug 24, 2024
Updated
Nov 3, 2025
Vendor
FORT Validator Project
Product
FORT Validator
Classifications
CWE-476, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 24, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 3, 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=0 <1.6.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

FORT Validator Project · FORT Validatorversion=0 <1.6.3

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
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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