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Heimdal 0.6.x before 0.6.1 and 0.5.x before 0.5.3 does not properly perform certain consistency checks for cross-realm requests, which allows remote attackers with control of a realm to impersonate others in the cross-realm trust path.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade heimdal | Jul 30, 2024 | May 4, 2004 |
| Freebsd | — | Upgrade FreeBSDUpgrade heimdal | Dec 10, 2025 | Apr 2, 2004 |
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