CVE-2018-12556

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.

CVSS v3.0 5.9 MEDIUM
CVSS v2.0 4.3 MEDIUM

5.9^/10

CVSS v3.0 : MEDIUM

Vector : AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Exploitability : 2.2 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

4.3^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:M/Au:N/C:N/I:P/A:N

Exploitability : 8.6 / Impact : 2.9

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact NONE

References

Link	Resource
https://www.openwall.com/lists/oss-security/2019/04/30/4	Mailing List Third Party Advisory
https://github.com/yarnpkg/website/commits/master	Third Party Advisory
https://github.com/RUB-NDS/Johnny-You-Are-Fired/blob/master/paper/johnny-fired.pdf	Third Party Advisory
https://github.com/RUB-NDS/Johnny-You-Are-Fired	Third Party Advisory
http://seclists.org/fulldisclosure/2019/Apr/38	Mailing List Third Party Advisory
http://packetstormsecurity.com/files/152703/Johnny-You-Are-Fired.html	VDB Entry Third Party Advisory

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Configurations

Configuration 1 (hide)

cpe:2.3:a:yarnpkg:website:*:*:*:*:*:*:*:*

Information

Published : 2019-05-16 10:29

Updated : 2019-05-21 07:03

NVD link : CVE-2018-12556

Mitre link : CVE-2018-12556

JSON object : View

CWE

CWE-347

Improper Verification of Cryptographic Signature

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Products Affected

yarnpkg

website

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