CVE-2017-3206 json
The Action Message Format (AMF3) deserializers used by Flamingo amf-serializer by Exadel, version 2.2.0, allows external entity references (XXEs) from XML documents embedded within AMF3 messages
published 2018-06-11 8 y ago modified 2026-06-17 4 mo ago also EUVD-2017-12327
- cvss
- 9.8
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 3.6%
- EPSS 3.6% chance of exploitation in 30 days, percentile 89%
- public exploits
- 0
- none known
Summary
The Java implementation of AMF3 deserializers used by Flamingo amf-serializer by Exadel, version 2.2.0, allows external entity references (XXEs) from XML documents embedded within AMF3 messages. If the XML parsing is handled incorrectly it could potentially expose sensitive data on the server, denial of service, or server side request forgery.
Exploit prediction
3.62% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- codewhitesec.blogspot.com https://codewhitesec.blogspot.com/2017/04/amf.html referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 9.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
Affected products
- Exadel Flamingo amf-serializer
Classification
- Weakness
-
- CWE-611 Improper Restriction of XML External Entity Reference
References
-
codewhitesec.blogspot.com
/2017/04/amf.html
exploit, third-party-advisory
-
kb.cert.org
/vuls/id/307983
third-party-advisory, us-government-resource
-
securityweek.com
/flaws-java-amf-libraries-allow-remote-code-execution
third-party-advisory
-
securityfocus.com
/bid/97380
vdb-entry, third-party-advisory
Sources
- CVE List CVE-2017-3206
- NVD CVE-2017-3206
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.