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Fort ValidatorApplication · Nicmx

CVE-2024-56169

MEDIUM · 5.3 CVSS v3.1 Published 2024-12-18
Fix available
A fix is available. Upgrade to after 1.6.6 or later.
See remediation →
62/100
Remediation priority · Elevated
Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
A validation integrity issue was discovered in Fort through 1.6.4 before 2.0.0. RPKI Relying Parties (such as Fort) are supposed to maintain a backup cache of the remote RPKI data. This can be employed as a fallback in case a new fetch fails or yields incorrect files. However, the product currently uses its cache merely as a bandwidth saving tool (because fetching is performed through deltas). If a fetch fails midway or yields incorrect files, there is no viable fallback. This leads to incomplete route origin validation data.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

Fort (RPKI Relying Party versions through 1.6.4 before 2.0.0) has a validation integrity flaw where it uses its local cache solely for bandwidth optimization via delta fetching, but fails to employ the cache as a functional fallback when remote RPKI data fetches fail or return incorrect files. This results in incomplete route origin validation data being used for BGP route validation.

MitigationUpgrade to Fort version 2.0.0 or later which implements proper cache fallback logic for failed or corrupted RPKI data fetches.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Fort ValidatorApplication
Affected:<= 1.6.6

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify Fort Validator installation and binary
    Locate the Fort binary (commonly at /usr/bin/fort, /usr/local/bin/fort, or via 'which fort' command). If installed as a package, check the installed package version using your system's package manager (e.g., 'dpkg -l | grep fort' or 'rpm -qa | grep fort').
    Affected if Fort Validator is installed and version is 1.6.6 or lower, or any version below 2.0.0.
  2. Determine the exact Fort version
    Run 'fort -v' or 'fort --version' to obtain the precise installed version number.
    Affected if Version is 1.6.6 or lower, or any version below 2.0.0 (the summary indicates versions through 1.6.4 before 2.0.0 are affected, while the product list specifies <= 1.6.6).
  3. Verify RPKI validation is enabled
    Inspect the Fort configuration file (typically at /etc/fort/fort.conf or /etc/rpki/fort.conf) and check if RPKI validation is actively configured and running. Check for 'enabled' or 'mode' settings related to RPKI origin validation.
    Affected if RPKI origin validation is enabled and Fort is performing BGP route validation using RPKI data.
  4. Check cache directory and configuration
    Examine the Fort configuration for cache settings (look for 'cache', 'local', 'repository' or 'rrdp'/'rsync' fetch parameters). Verify whether a local cache directory exists (commonly under /var/cache/fort or /var/lib/fort).
    Affected if A local cache is configured but the fallback behavior for failed fetches is not functioning (this is the vulnerability condition).

If Fort Validator version 1.6.6 or lower (or any version below 2.0.0) is installed and RPKI origin validation is enabled, the environment is affected by this cache fallback integrity flaw.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to a release after 1.6.6
Interim mitigation

Upgrade to Fort version 2.0.0 or later which implements proper cache fallback logic for failed or corrupted RPKI data fetches.

Recommended fix High confidence

Upgrade to Fort Validator >= 2.0.0

  1. 1. Identify the current Fort Validator version currently installed (e.g., fort-validator --version or equivalent command)
  2. 2. Navigate to the official Fort Validator GitHub repository at github.com/NICMx/Fort-Validator
  3. 3. Download Fort Validator version 2.0.0 (or latest stable release >= 2.0.0) from the releases section
  4. 4. Replace the existing Fort Validator installation with the new version
  5. 5. Verify the upgrade was successful by running fort-validator --version
  6. 6. Ensure the validation process now properly utilizes the backup cache as a fallback mechanism in case of fetch failures or incorrect files
Caveat Review release notes for version 2.0.0 to check for any configuration or behavior changes compared to 1.x versions

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Fort Validator Scoped from the published advisory
  • Consultation2.0 h
  • Implementation6.0 h
  • Testing3.0 h
  • Review / QA2.0 h
13.0 hours of engineering $2,290
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2024-56169 in production — separate from our analysis above.

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data