CVE-2019-9153

HIGH

Openpgpjs < 4.1.2 - Signature Verification Bypass

Title source: rule

Description

Improper Verification of a Cryptographic Signature in OpenPGP.js <=4.1.2 allows an attacker to forge signed messages by replacing its signatures with a "standalone" or "timestamp" signature.

Exploits (1)

nomisec WORKING POC

by ZenyWay · poc

https://github.com/ZenyWay/opgp-service-cve-2019-9153

View Code ZIP pw:eip

References (6)

[Third Party Advisory, VDB Entry] http://packetstormsecurity.com/files/154191/OpenPGP.js-4.2.0-Signature-Bypass-Invalid-Curve-Attack.html

[Patch, Third Party Advisory] https://github.com/openpgpjs/openpgpjs/pull/797/commits/327d3e5392a6f59a4270569d200c7f7a2bfc4cbc

[Third Party Advisory] https://github.com/openpgpjs/openpgpjs/pull/816

[Release Notes] https://github.com/openpgpjs/openpgpjs/releases/tag/v4.2.0

[Exploit, Third Party Advisory] https://sec-consult.com/en/blog/advisories/multiple-vulnerabilities-in-openpgp-js/

[Third Party Advisory] https://www.bsi.bund.de/SharedDocs/Downloads/EN/BSI/Publications/Studies/Mailvelope_Extensions/Mailvelope_Extensions_pdf.html#download=1

Scores

CVSS v3 7.5

EPSS 0.0036

EPSS Percentile 58.3%

Attack Vector NETWORK

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Details

CWE

CWE-347

Status published

Products (2)

npm/openpgp 0 - 4.2.0npm

openpgpjs/openpgpjs < 4.1.2

Published Aug 22, 2019

Tracked Since Feb 18, 2026