libhogweed6t64: A flaw was found in Nettle in versions before 3.7.2, where several Nettlesignature verification functions (GOST DSA,...
CVE-2021-20305 is fixed in 14 products on 1 platform, first by libhogweed4 3.4-1ubuntu0.1, released April 5, 2021. It is not reported as exploited. Patch Radar priority: High.
A flaw was found in Nettle in versions before 3.7.2, where several Nettlesignature verification functions (GOST DSA, EDDSA & ECDSA) result in theElliptic Curve Cryptography point (ECC) multiply function being called without-of-range scalers, possibly resulting in incorrect results. This flawallows an attacker to force an invalid signature, causing an assertionfailure or possible validation. The highest threat to this vulnerability isto confidentiality, integrity, as well as system availability.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| gnutls · RHEL 8 | 0:3.6.14-8.el8_3 | RHSA-2021:1206 | Apr 14, 2021 |
| gnutls · ol 8 | 0:3.6.14-8.el8_3 | ELSA-2021-1206 | Apr 16, 2021 |
| gnutls-c++ · RHEL 8 | 0:3.6.14-8.el8_3 | RHSA-2021:1206 | Apr 14, 2021 |
| gnutls-c++ · ol 8 | 0:3.6.14-8.el8_3 | ELSA-2021-1206 | Apr 16, 2021 |
| gnutls-dane · RHEL 8 | 0:3.6.14-8.el8_3 | RHSA-2021:1206 | Apr 14, 2021 |
| gnutls-dane · ol 8 | 0:3.6.14-8.el8_3 | ELSA-2021-1206 | Apr 16, 2021 |
| gnutls-devel · RHEL 8 | 0:3.6.14-8.el8_3 | RHSA-2021:1206 | Apr 14, 2021 |
| gnutls-devel · ol 8 | 0:3.6.14-8.el8_3 | ELSA-2021-1206 | Apr 16, 2021 |
| gnutls-utils · RHEL 8 | 0:3.6.14-8.el8_3 | RHSA-2021:1206 | Apr 14, 2021 |
| gnutls-utils · ol 8 | 0:3.6.14-8.el8_3 | ELSA-2021-1206 | Apr 16, 2021 |
| libhogweed4 · Ubuntu 18.04.6 LTS (bionic) | 3.4-1ubuntu0.1 | libhogweed4 3.4-1ubuntu0.1 | Apr 5, 2021 |
| libhogweed5 · Ubuntu 20.04 LTS (focal) | 3.5.1+really3.5.1-2ubuntu0.1 | libhogweed5 3.5.1+really3.5.1-2ubuntu0.1 | Apr 5, 2021 |
| libhogweed6t64 · Ubuntu 24.10 (oracular) | 3.7-2.1ubuntu1 | libhogweed6t64 3.7-2.1ubuntu1 | Jan 16, 2026 |
| libhogweed6t64 · Ubuntu 25.04 (plucky) | 3.7-2.1ubuntu1 | libhogweed6t64 3.7-2.1ubuntu1 | Jan 16, 2026 |
| libnettle6 · Ubuntu 18.04.6 LTS (bionic) | 3.4-1ubuntu0.1 | libnettle6 3.4-1ubuntu0.1 | Apr 5, 2021 |
| libnettle7 · Ubuntu 20.04 LTS (focal) | 3.5.1+really3.5.1-2ubuntu0.1 | libnettle7 3.5.1+really3.5.1-2ubuntu0.1 | Apr 5, 2021 |
| libnettle8t64 · Ubuntu 24.10 (oracular) | 3.7-2.1ubuntu1 | libnettle8t64 3.7-2.1ubuntu1 | Jan 16, 2026 |
| libnettle8t64 · Ubuntu 25.04 (plucky) | 3.7-2.1ubuntu1 | libnettle8t64 3.7-2.1ubuntu1 | Jan 16, 2026 |
| nettle · RHEL 8 | 0:3.4.1-4.el8_3 | RHSA-2021:1206 | Apr 14, 2021 |
| nettle · ol 8 | 0:3.4.1-4.el8_3 | ELSA-2021-1206 | Apr 16, 2021 |
| nettle-bin · Ubuntu 18.04.6 LTS (bionic) | 3.4-1ubuntu0.1 | nettle-bin 3.4-1ubuntu0.1 | Apr 5, 2021 |
| nettle-bin · Ubuntu 20.04 LTS (focal) | 3.5.1+really3.5.1-2ubuntu0.1 | nettle-bin 3.5.1+really3.5.1-2ubuntu0.1 | Apr 5, 2021 |
| nettle-bin · Ubuntu 24.10 (oracular) | 3.7-2.1ubuntu1 | nettle-bin 3.7-2.1ubuntu1 | Jan 16, 2026 |
| nettle-bin · Ubuntu 25.04 (plucky) | 3.7-2.1ubuntu1 | nettle-bin 3.7-2.1ubuntu1 | Jan 16, 2026 |
| nettle-devel · RHEL 8 | 0:3.4.1-4.el8_3 | RHSA-2021:1206 | Apr 14, 2021 |
| nettle-devel · ol 8 | 0:3.4.1-4.el8_3 | ELSA-2021-1206 | Apr 16, 2021 |
Patch Radar data is free to use with attribution. Terms and how to credit it.
Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.