CVE-2019-20634 — An issue was discovered in Proofpoint Email Protection through 2019-09-08
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
Published
2020-03-30T20:50:59.000Z
Last modified
2024-10-28T16:15:23.594Z
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
01What is this vulnerability?
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.
02Affected products
| Vendor | Product | Versions |
|---|
| n | a / n/a | n/a |
03Active exploitation status
Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.
04Recommended remediation
- Patch to a fixed version listed in the vendor advisory (see references below).
- Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
- Hunt historical logs for exploitation indicators — see Detection signatures below.
05Technical details
For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.
06Detection signatures
Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.
07Related CVEs
No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.
08Timeline
- Published: 2020-03-30T20:50:59.000Z
- Last modified: 2024-10-28T16:15:23.594Z
09References
- github.com — https://github.com/moohax/Proof-Pudding
- github.com — https://github.com/moohax/Talks/blob/master/slides/DerbyCon19.pdf
- www.proofpoint.com — https://www.proofpoint.com/us/security/CVE-2019-20634
- www.proofpoint.com — https://www.proofpoint.com/us/security/security-advisories/pfpt-sn-2020-0001
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