CVE-2024-56375

Name	CVE-2024-56375
Description	An integer underflow was discovered in Fort 1.6.3 and 1.6.4 before 1.6.5. A malicious RPKI repository that descends from a (trusted) Trust Anchor can serve (via rsync or RRDP) a Manifest RPKI object containing an empty fileList. Fort dereferences (and, shortly afterwards, writes to) this array during a shuffle attempt, before the validation that would normally reject it when empty. This out-of-bounds access is caused by an integer underflow that causes the surrounding loop to iterate infinitely. Because the product is permanently stuck attempting to overshuffle an array that doesn't actually exist, a crash is nearly guaranteed.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
fort-validator (PTS)	bullseye (security), bullseye	1.5.3-1~deb11u1	fixed
	bookworm	1.5.4-1	fixed
	trixie	1.6.4+20240930-1	vulnerable
	sid	1.6.5-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version
fort-validator	source	bullseye	(not affected)
fort-validator	source	bookworm	(not affected)
fort-validator	source	(unstable)	1.6.5-1

Notes

[bookworm] - fort-validator <not-affected> (Vulnerable code introduced later in 1.6.3)
[bullseye] - fort-validator <not-affected> (Vulnerable code introduced later in 1.6.3)
https://github.com/NICMx/FORT-validator/commit/17f095210553182b0e0a28ee6fd41b0d3c8fc1d3 (1.6.5)
https://github.com/NICMx/FORT-validator/issues/154