CVE-2017-3202 json
The implementation of Action Message Format (AMF3) deserializers in Flamingo amf-serializer by Exadel, version 2.2.0, may allow instantiation of arbitrary classes due to improper code control
published 2018-06-11 8 y ago modified 2026-06-17 4 mo ago also GHSA-j88v-q3vw-p9vr , EUVD-2022-4311
- cvss
- 9.8
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 8.1%
- EPSS 8.1% chance of exploitation in 30 days, percentile 94%
- public exploits
- 0
- none known
Summary
The Java implementation of AMF3 deserializers used in Flamingo amf-serializer by Exadel, version 2.2.0, may allow instantiation of arbitrary classes via their public parameter-less constructor and subsequently call arbitrary Java Beans setter methods. The ability to exploit this vulnerability depends on the availability of classes in the class path that make use of deserialization. A remote attacker with the ability to spoof or control information may be able to send serialized Java objects with pre-set properties that result in arbitrary code execution when deserialized.
Exploit prediction
8.07% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-08).
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 |
| GitHub | 3.0 | 9.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| maven | com.exadel.flamingo.flex:amf-serializer | <=2.2.0 |
no fix listed |
Affected products
- Exadel Flamingo amf-serializer
Classification
References
-
codewhitesec.blogspot.com
/2017/04/amf.html
web, 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
web, third-party-advisory
-
securityfocus.com
/bid/97380
vdb-entry, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2017-3202
advisory
Sources
- CVE List CVE-2017-3202
- GitHub Advisory GHSA-j88v-q3vw-p9vr
- NVD CVE-2017-3202
Fencer Vulns 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.