libzstd1: In the Zstandard command-line utility prior to v1.4.1, output files were created with default permissions
CVE-2021-24031 is fixed in 2 products on 1 platform, first by libzstd1 1.3.3+dfsg-2ubuntu1.2, released February 19, 2021. It is not reported as exploited. Patch Radar priority: Routine.
In the Zstandard command-line utility prior to v1.4.1, output files were created with default permissions. Correct file permissions (matching the input) would only be set at completion time. Output files could therefore be readable or writable to unintended parties.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| libzstd1 · Ubuntu 18.04.6 LTS (bionic) | 1.3.3+dfsg-2ubuntu1.2 | libzstd1 1.3.3+dfsg-2ubuntu1.2 | Feb 19, 2021 |
| libzstd1 · Ubuntu 20.04 LTS (focal) | 1.4.4+dfsg-3ubuntu0.1 | libzstd1 1.4.4+dfsg-3ubuntu0.1 | Feb 19, 2021 |
| zstd · Ubuntu 18.04.6 LTS (bionic) | 1.3.3+dfsg-2ubuntu1.2 | zstd 1.3.3+dfsg-2ubuntu1.2 | Feb 19, 2021 |
| zstd · Ubuntu 20.04 LTS (focal) | 1.4.4+dfsg-3ubuntu0.1 | zstd 1.4.4+dfsg-3ubuntu0.1 | Feb 19, 2021 |
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