VDB
CVE-2018-12556
CVE-2018-12556
PUBLISHED
CVSS 5.900000095367432 MEDIUM
The signature verification routine in install.sh in yarnpkg/website through 2018-06-05 only verifies that the yarn release is signed by any (arbitrary) key in the local keyring of the user, and does not pin the signature to the yarn release key, which allows remote attackers to sign tampered yarn release packages with their own key.
EPSS 1.78% · 76.6th percentile
Risk Scores
CVSS 3.0
5.900000095367432
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS Score
1.78%
76.6th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:20.04:LTS | node-yarnpkg | 1.22.4-2, 1.19.1-1, 1.13.0-3 |
| Ubuntu:22.04:LTS | node-yarnpkg | 1.22.10+~cs22.25.14-3, 1.22.10+~cs22.25.14-5, 1.22.10+~cs22.25.14-8 |
| Ubuntu:25.10 | node-yarnpkg | 0, 4.0.2+dfsg-3, 4.1.0+dfsg-1 |
| Ubuntu:24.04:LTS | node-yarnpkg | *, 1.22.19+~cs24.27.18-4, 0 |
Timeline
- May 16, 2019 CVE Published
- Apr 14, 2021 EPSS Score
- Jun 23, 2021 EPSS Score
- Aug 24, 2021 EPSS Score
- Oct 26, 2021 EPSS Score
- Dec 28, 2021 EPSS Score
- Mar 1, 2022 EPSS Score
- May 2, 2022 EPSS Score
- Jul 4, 2022 EPSS Score
- Sep 6, 2022 EPSS Score
- Nov 8, 2022 EPSS Score
- Jan 9, 2023 EPSS Score
References
- https://ubuntu.com/security/CVE-2018-12556 third-party-advisory
- http://packetstormsecurity.com/files/152703/Johnny-You-Are-Fired.html third-party-advisory
- http://seclists.org/fulldisclosure/2019/Apr/38 third-party-advisory
- https://github.com/RUB-NDS/Johnny-You-Are-Fired third-party-advisory
- https://github.com/RUB-NDS/Johnny-You-Are-Fired/blob/master/paper/johnny-fired.pdf third-party-advisory
- https://github.com/yarnpkg/website/commits/master third-party-advisory
- https://www.openwall.com/lists/oss-security/2019/04/30/4 third-party-advisory
- https://neopg.io/blog/yarn-signature-bypass/ third-party-advisory
- https://www.cve.org/CVERecord?id=CVE-2018-12556 third-party-advisory