Vulnerability CVE-2019-9153
Published: 2019-08-22

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.

See advisories in our WLB2 database:
Topic
Author
Date
High
OpenPGP.js 4.2.0 Signature Bypass / Invalid Curve Attack
Wolfgang Ettling...
22.08.2019

Type:

CWE-347

 (Improper Verification of Cryptographic Signature)

CVSS2 => (AV:N/AC:L/Au:N/C:N/I:P/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5/10
2.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
Partial
None
Affected software
Openpgpjs -> Openpgpjs 

 References:
http://packetstormsecurity.com/files/154191/OpenPGP.js-4.2.0-Signature-Bypass-Invalid-Curve-Attack.html
https://github.com/openpgpjs/openpgpjs/pull/797/commits/327d3e5392a6f59a4270569d200c7f7a2bfc4cbc
https://github.com/openpgpjs/openpgpjs/pull/816
https://github.com/openpgpjs/openpgpjs/releases/tag/v4.2.0
https://sec-consult.com/en/blog/advisories/multiple-vulnerabilities-in-openpgp-js/
https://www.bsi.bund.de/SharedDocs/Downloads/EN/BSI/Publications/Studies/Mailvelope_Extensions/Mailvelope_Extensions_pdf.html#download=1
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