CVE-2018-12556 Detail

Current 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.


View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score:  5.9 MEDIUM
Vector:  CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
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 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-347 Improper Verification of Cryptographic Signature cwe source acceptance level NIST  

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Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2018-12556
NVD Published Date:
05/16/2019
NVD Last Modified:
05/21/2019
Source:
MITRE