Vulnerability in Proofpoint Email Protection
CVE-2019-20634
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.016 (75.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 75th percentile — 75.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/moohax/Proof-Pudding (Third Party Advisory)
- github.com/moohax/Talks/blob/master/slides/DerbyCon19.pdf (Third Party Advisory)
- www.proofpoint.com/us/security/CVE-2019-20634 (Vendor Advisory)
- www.proofpoint.com/us/security/security-advisories/pfpt-sn-2020-0001 (Vendor Advisory)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2019-20634?
- CVE-2019-20634 is a low-severity vulnerability in Proofpoint Email Protection, classified under Incorrect Comparison. CVSS score: 3.7/10. Published 2020-03-30.
- How severe is CVE-2019-20634?
- Low severity. CVSS v3 base score is 3.7 out of 10.
- Is CVE-2019-20634 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.