PT-2019-8900 · Yarnpkg · Yarnpkg

Marcus Brinkmann · Publicado 2019-05-16 · Atualizado 2019-05-21 · CVE-2018-12556

Positive Technologies (AI Summary)

CVSS v3.1

5.9

Média

Vetor base

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

Name of the Vulnerable Software and Affected Versions yarnpkg/website versions prior to 2018-06-05

Description The issue lies in the signature verification routine of the install.sh script, which only checks if a yarn release is signed by any key in the user's local keyring. This does not ensure the release is signed by the official yarn release key, allowing remote attackers to sign tampered packages with their own key.

Recommendations For versions prior to 2018-06-05, update to a version released after 2018-06-05 to ensure the signature verification routine correctly pins the signature to the yarn release key.

Correção

Improper Verification of Cryptographic Signature

Enumeração de Fraquezas

CWE-347

Identificadores relacionados

CVE-2018-12556

Produtos afetados

Yarnpkg

Referências · 12

• https://github.com/yarnpkg/website/commits/master · Nota
• https://github.com/RUB-NDS/Johnny-You-Are-Fired · Nota
• https://github.com/RUB-NDS/Johnny-You-Are-Fired/blob/master/paper/johnny-fired.pdf · Nota
• https://neopg.io/blog/yarn-signature-bypass · Nota
• http://packetstormsecurity.com/files/152703/Johnny-You-Are-Fired.html · Nota
• http://seclists.org/fulldisclosure/2019/Apr/38 · Nota
• https://ubuntu.com/security/CVE-2018-12556 · Aviso do Fabricante
• https://osv.dev/vulnerability/CVE-2018-12556 · Aviso do Fabricante
• https://cve.org/CVERecord?id=CVE-2018-12556 · Nota de Segurança
• https://nvd.nist.gov/vuln/detail/CVE-2018-12556 · Nota de Segurança
• https://osv.dev/vulnerability/UBUNTU-CVE-2018-12556 · Aviso do Fabricante
• https://openwall.com/lists/oss-security/2019/04/30/4 · Nota