XXE in Exadel Flamingo

CVE-2017-3206

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.

Vulnerability class: XXE (XML External Entity)

EPSS: 0.037 (88.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

  • cret@cert.org (Exploit, Third Party Advisory, x_refsource_MISC)
  • cret@cert.org (US Government Resource, x_refsource_CERT-VN, Third Party Advisory, third-party-advisory)
  • cret@cert.org (Third Party Advisory, x_refsource_MISC)
  • cret@cert.org (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_BID)

Frequently asked questions

What is CVE-2017-3206?
CVE-2017-3206 is a critical-severity vulnerability in Exadel Flamingo, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 9.8/10. Published 2018-06-11.
How severe is CVE-2017-3206?
Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2017-3206 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.