#VU25736 Improper validation of integrity check value in yarn
Published: March 3, 2020
Vulnerability identifier: #VU25736
Vulnerability risk: High
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: N/A
CWE-ID: CWE-354
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
yarn
yarn
Software vendor:
Yarn
Yarn
Description
The vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to the software of the affected products does not check the integrity. A remote attacker can pollute yarn cache via a crafted yarn.lock file and place a malicious package into cache under any name/version, bypassing both integrity and hash checks in yarn.lock so that any future installs of that package will install the fake version (regardless of integrity and hashes).
Remediation
Install updates from vendor's website.