CVE-2019-20634

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.

Category

3.7
CVSS
Severity: Low
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.46%
Vendor Advisory proofpoint.com Vendor Advisory proofpoint.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/moohax/Proof-Pudding third party advisory
https://github.com/moohax/Talks/blob/master/slides/DerbyCon19.pdf third party advisory
https://www.proofpoint.com/us/security/CVE-2019-20634 vendor advisory
https://www.proofpoint.com/us/security/security-advisories/pfpt-sn-2020-0001 vendor advisory
https://atlas.mitre.org/studies/AML.CS0008

Frequently Asked Questions

What is the severity of CVE-2019-20634?
CVE-2019-20634 has been scored as a low severity vulnerability.
How to fix CVE-2019-20634?
To fix CVE-2019-20634, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-20634 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2019-20634 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.