Vulnerability CVE-2019-9155
Published: 2019-08-22

Description:
A cryptographic issue in OpenPGP.js <=4.2.0 allows an attacker who is able provide forged messages and gain feedback about whether decryption of these messages succeeded to conduct an invalid curve attack in order to gain the victim's ECDH private key.

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-310

 (Cryptographic Issues)

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

CVSS Base Score
Impact Subscore
Exploitability Subscore
4.3/10
2.9/10
8.6/10
Exploit range
Attack complexity
Authentication
Remote
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
None
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/853
https://github.com/openpgpjs/openpgpjs/pull/853/commits/7ba4f8c655e7fd7706e8d7334e44b40fdf56c43e
https://github.com/openpgpjs/openpgpjs/releases/tag/v4.3.0
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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