National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

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.

Source:  MITRE
View Analysis Description

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 5.9 MEDIUM
Vector: AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N (V3 legend)
Impact Score: 3.6
Exploitability Score: 2.2


Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): High
Availability (A): None

CVSS v2.0 Severity and Metrics:

Base Score: 4.3 MEDIUM
Vector: (AV:N/AC:M/Au:N/C:N/I:P/A:N) (V2 legend)
Impact Subscore: 2.9
Exploitability Subscore: 8.6


Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (AU): None
Confidentiality (C): None
Integrity (I): Partial
Availability (A): None
Additional Information:
Allows unauthorized modification

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

Technical Details

Vulnerability Type (View All)

  • Improper Verification of Cryptographic Signature (CWE-347)

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:a:yarnpkg:website:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (including)
2018-06-05


Change History

1 change record found - show changes

Quick Info

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