Improper validation of integrity check value in yarn - #VU25736
Published: March 3, 2020
Vulnerability identifier: #VU25736
CSH Severity: High
CVSS v4.0: 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
Vendor: Yarn
Affected software:
yarn
yarn
Detailed vulnerability 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.