CVE-2017-3202: Amf serializer Deserialization Of Untrusted Data Vulnerability

CRITICAL

Advisory Identifier: GHSA-j88v-q3vw-p9vr

CVSS 9.8

Published 2022-05-13

Advisory Summary

CVE-2017-3202 is a CRITICAL (CVSS 9.8) deserialization of untrusted data vulnerability (CWE-502: Deserialization of Untrusted Data) affecting Amf serializer libraries in the Maven ecosystem. The issue involves deserialization of untrusted data in flamingo amf-serializer. Remediation is available in the latest vendor maintenance releases.

CVE-2017-3202 at a Glance

CVE Identifier CVE-2017-3202

GHSA Identifier GHSA-j88v-q3vw-p9vr

Severity CRITICAL

CVSS v3.1 Base Score 9.8

CWE Classification CWE-502: Deserialization of Untrusted Data

Affected Product Amf serializer

Package Ecosystem Maven

Published Date 2022-05-13

Last Updated 2023-12-22

Security Impact

CVSS: 9.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

Attack Vector Network (AV:N)

Attack Complexity Low (AC:L)

Privileges Required None (PR:N)

User Interaction None (UI:N)

Scope Unchanged (S:U)

Confidentiality High (C:H)

Integrity High (I:H)

Availability High (A:H)

How to Fix CVE-2017-3202

To remediate this vulnerability, upgrade all affected Amf serializer dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

com.exadel.flamingo.flex:amf-serializer fixed: Latest secure release

<dependency>
    <groupId>com.exadel.flamingo.flex</groupId>
    <artifactId>amf-serializer</artifactId>
    <version>Latest secure release</version>
</dependency>

Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release:

mvn dependency:tree -Dincludes=com.exadel.flamingo.flex

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2017-3202, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=com.exadel.flamingo.flex

Analyze the terminal output to locate any version of Amf serializer in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The mvn dependency:tree -Dincludes=com.exadel.flamingo.flex command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-502: Deserialization of Untrusted Data, where the product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid. In Amf serializer, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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.

CVE-2017-3202 Affected Amf serializer Versions

1 component(s)

Product / Package	Ecosystem	Affected Versions	Fixed Version
com.exadel.flamingo.flex:amf-serializer maven/com.exadel.flamingo.flex/amf-serializer	Maven	≤ 2.2.0

References

NVD — CVE-2017-3202 NVD

https://nvd.nist.gov/vuln/detail/CVE-2017-3202

codewhitesec.blogspot.com/2017/04/amf.html WEB

https://codewhitesec.blogspot.com/2017/04/amf.html

Amf serializer Security Information SECURITY

http://www.securityweek.com/flaws-java-amf-libraries-allow-remote-code-execution

Frequently Asked Questions

What is CVE-2017-3202?

CVE-2017-3202 is a security vulnerability in Amf serializer involving Deserialization of Untrusted Data in Flamingo amf-serializer under CWE-502: Deserialization of Untrusted Data.

Which Amf serializer versions are affected?

Affected versions include releases prior to current release patches across affected packages: com.exadel.flamingo.flex:amf-serializer.

What version fixes CVE-2017-3202?

Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.

Is amf-serializer affected?

Yes, com.exadel.flamingo.flex:amf-serializer is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.

What is the CVSS score of CVE-2017-3202?

CVE-2017-3202 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

What CWE is associated with CVE-2017-3202?

CVE-2017-3202 is classified under CWE-502: Deserialization of Untrusted Data (The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.).

How can I check Maven dependencies for CVE-2017-3202?

Run the dependency tree command: 'mvn dependency:tree -Dincludes=com.exadel.flamingo.flex'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.

Machine-readable OSV JSON OSV v1.5 Schema

Normalized schema output

View Raw JSON

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-j88v-q3vw-p9vr",
  "modified" : "2023-12-22T21:59:39Z",
  "published" : "2022-05-13T01:36:43Z",
  "aliases" : [ "CVE-2017-3202" ],
  "summary" : "Deserialization of Untrusted Data in Flamingo amf-serializer",
  "details" : "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.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "com.exadel.flamingo.flex:amf-serializer"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "2.2.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2017-3202"
  }, {
    "type" : "WEB",
    "url" : "https://codewhitesec.blogspot.com/2017/04/amf.html"
  }, {
    "type" : "WEB",
    "url" : "http://www.securityweek.com/flaws-java-amf-libraries-allow-remote-code-execution"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-502" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-12-22T21:59:39Z",
    "nvd_published_at" : "2018-06-11T17:29:00Z"
  }
}

CVSS V3

9.8 CRITICAL