CVE-2019-20634 Information

Description

An issue was discovered in Proofpoint Email Protection through 2019-09-08. By collecting scores from Proofpoint email headers it is possible to build a copy-cat Machine Learning Classification model and extract insights from this model. The insights gathered allow an attacker to craft emails that receive preferable scores with a goal of delivering malicious emails.

CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Reference

https://github.com/moohax/Proof-Pudding https://github.com/moohax/Talks/blob/master/slides/DerbyCon19.pdf https://www.proofpoint.com/us/security/CVE-2019-20634 https://www.proofpoint.com/us/security/security-advisories/pfpt-sn-2020-0001

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

LOW

Availability Impact

NONE

Base Score

NONE

Base Severity

3.7