CVE-2019-15608 Information

Description

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.

CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Reference

https://github.com/yarnpkg/yarn/blob/master/CHANGELOG.md1190 https://github.com/yarnpkg/yarn/commit/0474b8c66a8ea298f5e4dedc67b2de464297ad1c https://hackerone.com/reports/703138

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

HIGH

Base Score

NONE

Base Severity

5.9