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libzmq before 4.0.6 and 4.1.x before 4.1.1 allows remote attackers to conduct downgrade attacks and bypass ZMTP v3 protocol security mechanisms via a ZMTP v2 or earlier header.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade zeromq3 | Jul 30, 2024 | Jun 3, 2015 |
| Freebsd | — | Upgrade libzmq4 | Dec 10, 2025 | Jun 10, 2015 |
| Suse | — | Upgrade zeromq-develUpgrade libzmq3Upgrade libzmq5 | Dec 18, 2015 | Jun 3, 2015 |
| Ubuntu | — | Upgrade zeromq3 | Nov 19, 2024 | Jun 3, 2015 |
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