An issue was discovered in Tor before 0.4.6.5, aka TROVE-2021-005. Hashing is mishandled for certain retrieval of circuit data. Consequently. an attacker can trigger the use of an attacker-chosen circuit ID to cause algorithm inefficiency.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade tor | Oct 1, 2024 | Jun 29, 2021 |
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Jun 29, 2021 |
| Debian | — | Upgrade tor | Jun 21, 2021 | Jun 21, 2021 |
| Gentoo Linux | — | Upgrade net-vpn/tor. | Jul 12, 2021 | Jun 29, 2021 |
| Suse | — | Upgrade tor | Jun 26, 2021 | Jun 26, 2021 |
| Ubuntu | — | Upgrade tor (Ubuntu Pro) | Mar 22, 2023 | Jun 29, 2021 |
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