CVEvulnerability
CVE-2018-12556
5.9 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2019-05-16
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.0 ([email protected])
- 5.9 MEDIUM — CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
- CVSS 2.0 ([email protected])
- 4.3 MEDIUM — AV:N/AC:M/Au:N/C:N/I:P/A:N
- Weaknesses
- CWE-347
Description
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.
Affected configurations
• yarnpkg website (<= 2018-06-05)
Related
Weakness · CWE (1)
- CWE-347 Improper Verification of Cryptographic Signature weakness
References
- http://packetstormsecurity.com/files/152703/Johnny-You-Are-Fired.html Third Party Advisory, VDB Entry
- http://seclists.org/fulldisclosure/2019/Apr/38 Mailing List, 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 Mailing List, Third Party Advisory
- http://packetstormsecurity.com/files/152703/Johnny-You-Are-Fired.html Third Party Advisory, VDB Entry
- http://seclists.org/fulldisclosure/2019/Apr/38 Mailing List, 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 Mailing List, Third Party Advisory