CVE-2024-45237

Publication date 24 August 2024

Last updated 9 October 2025

Ubuntu priority

Cvss 3 Severity Score

Description

An issue was discovered in Fort before 1.6.3. 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.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
fort-validator	25.10 questing	Not affected
	25.04 plucky	Not affected
	24.10 oracular	Ignored end of life, was needs-triage
	24.04 LTS noble	Fixed 1.6.1-1ubuntu0.1~esm2
	22.04 LTS jammy	Fixed 1.5.3-1ubuntu0.1
	20.04 LTS focal	Fixed 1.2.0-1ubuntu0.1~esm1

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
fort-validator	Upstream: 939d988

Severity score breakdown

Parameter	Value
Base score	9.8 · Critical
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

USN-7813-1
FORT Validator vulnerabilities
8 October 2025