PT-2024-36807 · Fort · Fort

Niklas Vogel · Published 2024-12-22 · Updated 2025-04-22 · CVE-2024-56375

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Fort versions 1.6.3 through 1.6.4

Description An integer underflow was discovered in Fort, allowing a malicious RPKI repository that descends from a trusted Trust Anchor to serve a Manifest RPKI object containing an empty fileList. This causes Fort to dereference and write to the array during a shuffle attempt, before the validation that would normally reject it when empty, resulting in an out-of-bounds access due to the integer underflow. The surrounding loop iterates infinitely, causing the product to become permanently stuck and nearly guaranteeing a crash.

Recommendations For Fort versions 1.6.3 and 1.6.4, update to version 1.6.5 or later to resolve the issue. As a temporary workaround, consider restricting access to the RPKI repository to minimize the risk of exploitation.

Fix

Integer Underflow

Weakness Enumeration

CWE-191

Related Identifiers

CVE-2024-56375

Affected Products

Fort

References · 18

• https://github.com/NICMx/FORT-validator/issues/154 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-56375 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-56375 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2024-56375 · Vendor Advisory
• https://nicmx.github.io/FORT-validator/CVE.html · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2024-56375 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2024-56375 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2024-56375 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2024-56375 · Vendor Advisory
• https://github.com/NICMx/FORT-validator/commit/17f095210553182b0e0a28ee6fd41b0d3c8fc1d3 · Note
• https://twitter.com/VulmonFeeds/status/1870977679937126547 · Twitter Post
• https://twitter.com/CVEnew/status/1870962573455089808 · Twitter Post
• https://t.me/cvenotify/105351 · Telegram Post
• https://twitter.com/cracbot/status/1872522846100206048 · Twitter Post
• https://t.me/cvedetector/13518 · Telegram Post