Debian dsa-6490 : fort-validator - security update

high Nessus Plugin ID 343871

Synopsis

The remote Debian host is missing a security-related update.

Description

The remote Debian 13 host has a package installed that is affected by a vulnerability as referenced in the dsa-6490 advisory.

- ------------------------------------------------------------------------- Debian Security Advisory DSA-6490-1 [email protected] https://www.debian.org/security/ Moritz Muehlenhoff September 08, 2026 https://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package : fort-validator CVE ID : CVE-2026-53499

Qi Wang and Jianjun Chen discovered that FORT validator, a RPKI validation service, performed incomplete validation of RRDP notifications, which could result in denial of service via cache poisoning.

For additional details please refer to the upstream advisory at https://github.com/NICMx/FORT-validator/security/advisories/GHSA-qfm3-577x-rh54

For the stable distribution (trixie), this problem has been fixed in version 1.6.8-0+deb13u1.

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 Security Advisories, how to apply these updates to your system and frequently asked questions can be found at: https://www.debian.org/security/

Mailing list: [email protected]

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

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

Solution

Upgrade the fort-validator packages.

Plugin Details

Severity: High

ID: 343871

File Name: debian_DSA-6490.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Debian Local Security Checks

Published: 9/8/2026

Updated: 9/8/2026

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

CVSS v2

Risk Factor: Medium

Base Score: 5.8

Temporal Score: 4.3

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

CVSS Score Source: CVE-2026-53499

CVSS v4

Risk Factor: High

Base Score: 7.2

Threat Score: 4.2

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:H/SA:H

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:13.0, 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: 9/8/2026

Vulnerability Publication Date: 8/21/2026

Reference Information

CVE: CVE-2026-53499

Detections

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