Note:
This project will be discontinued after December 13, 2021. [more]
2020-03-15
The package integrity validation in yarn < 1.19.0 contains a TOCTOU vulnerability where the hash is computed before writing a package to cache. It's not computed again when reading from the cache. This may lead to a cache pollution attack.
| Products | Yarn |
| Type | Time-of-check Time-of-use (TOCTOU) Race Condition (CWE-367) |
| First patch | - None (likely due to unavailable code) |
| Links |
• https://github.com/yarnpkg/yarn/blob/master/CHANGELOG.md#1190
• https://github.com/yarnpkg/yarn/commit/0474b8c66a8ea298f5e4dedc67b2de464297ad1c • https://hackerone.com/reports/703138 |