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.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade fort-validator | Feb 25, 2025 | Aug 24, 2024 |
| Ubuntu | — | Upgrade fort-validator (Ubuntu Pro)Upgrade fort-validator | Oct 10, 2025 | Oct 8, 2025 |
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