Debian dla-4066 : fort-validator - security update

critical Nessus Plugin ID 216672

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Synopsis

The remote Debian host is missing one or more security-related updates.

Description

The remote Debian 11 host has a package installed that is affected by multiple vulnerabilities as referenced in the dla-4066 advisory.

------------------------------------------------------------------------- Debian LTS Advisory DLA-4066-1 [email protected] https://www.debian.org/lts/security/ Daniel Leidert February 24, 2025 https://wiki.debian.org/LTS
-------------------------------------------------------------------------

Package : fort-validator Version : 1.5.3-1~deb11u2 CVE ID : CVE-2024-45234 CVE-2024-45235 CVE-2024-45236 CVE-2024-45237 CVE-2024-45238 CVE-2024-45239 CVE-2024-48943

Multiple vulnerabilities have been discovered in fort-validator, a RPKI validator and RTR server.

CVE-2024-45234

A malicious RPKI repository that descends from a (trusted) Trust Anchor can serve (via rsync or RRDP) an ROA or a Manifest containing a signedAttrs encoded in non-canonical form. This bypasses Fort's BER decoder, reaching a point in the code that panics when faced with data not encoded in DER. Because Fort is an RPKI Relying Party, a panic can lead to Route Origin Validation unavailability, which can lead to compromised routing.

CVE-2024-45235

A malicious RPKI repository that descends from a (trusted) Trust Anchor can serve (via rsync or RRDP) a resource certificate containing an Authority Key Identifier extension that lacks the keyIdentifier field. Fort references this pointer without sanitizing it first. Because Fort is an RPKI Relying Party, a crash can lead to Route Origin Validation unavailability, which can lead to compromised routing.

CVE-2024-45236

A malicious RPKI repository that descends from a (trusted) Trust Anchor can serve (via rsync or RRDP) a signed object containing an empty signedAttributes field. Fort accesses the set's elements without sanitizing it first. Because Fort is an RPKI Relying Party, a crash can lead to Route Origin Validation unavailability, which can lead to compromised routing.

CVE-2024-45237

A malicious RPKI repository that descends from a (trusted) Trust Anchor can serve (via rsync or RRDP) a resource certificate containing a Key Usage extension composed of more than two bytes of data. Fort writes this string into a 2-byte buffer without properly sanitizing its length, leading to a buffer overflow.

CVE-2024-45238

A malicious RPKI repository that descends from a (trusted) Trust Anchor can serve (via rsync or RRDP) a resource certificate containing a bit string that doesn't properly decode into a Subject Public Key. OpenSSL does not report this problem during parsing, and when compiled with OpenSSL libcrypto versions below 3, Fort recklessly dereferences the pointer. Because Fort is an RPKI Relying Party, a crash can lead to Route Origin Validation unavailability, which can lead to compromised routing.

CVE-2024-45239

A malicious RPKI repository that descends from a (trusted) Trust Anchor can serve (via rsync or RRDP) an ROA or a Manifest containing a null eContent field. Fort dereferences the pointer without sanitizing it first. Because Fort is an RPKI Relying Party, a crash can lead to Route Origin Validation unavailability, which can lead to compromised routing.

CVE-2024-48943

A malicious RPKI rsync repository can prevent Fort from finishing its validation run by drip-feeding its content. The delayed validation can lead to stale or unavailable Route Origin Validation.

For Debian 11 bullseye, these problems have been fixed in version 1.5.3-1~deb11u2.

We recommend that you upgrade your fort-validator packages.

For the detailed security status of fort-validator please refer to its security tracker page at:
https://security-tracker.debian.org/tracker/fort-validator

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS

Attachment:
signature.asc Description: This is a digitally signed message part

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Upgrade the fort-validator packages.

Plugin Details

Severity: Critical

ID: 216672

File Name: debian_DLA-4066.nasl

Version: 1.1

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 2/23/2025

Updated: 2/23/2025

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2024-45237

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:11.0, p-cpe:/a:debian:debian_linux:fort-validator

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 2/24/2025

Vulnerability Publication Date: 8/24/2024

Reference Information

CVE: CVE-2024-45234, CVE-2024-45235, CVE-2024-45236, CVE-2024-45237, CVE-2024-45238, CVE-2024-45239, CVE-2024-48943

Detections

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