{"id":"CVE-2017-3203","aliases":["EUVD-2022-3232","GHSA-8v4h-j42h-wfhc"],"status":"published","title":"Pivotal/Spring Spring-flex's Action Message Format (AMF3) Java implementation is vulnerable to insecure deserialization","description":"The Java implementations of AMF3 deserializers in Pivotal/Spring Spring-flex derive class instances from java.io.Externalizable rather than the AMF3 specification's recommendation of flash.utils.IExternalizable. A remote attacker with the ability to spoof or control an RMI server connection may be able to send serialized Java objects that execute arbitrary code when deserialized.","severity":{"version":"3.0","score":8.1,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.06229,"percentile":0.93583,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-502"],"published":"2018-06-11T17:00:00Z","modified":"2026-06-17T01:17:43Z","affected":[{"source":"ghsa","ecosystem":"Maven","package":"org.springframework.flex:spring-flex","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"1.5.2.RELEASE"}]}]},{"source":"osv","ecosystem":"Maven","package":"org.springframework.flex:spring-flex","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"1.5.2.RELEASE"}]}],"versions":["1.0.0.RELEASE","1.0.1.RELEASE","1.0.2.RELEASE","1.0.3.RELEASE","1.5.0.RELEASE","1.5.1.RELEASE","1.5.2.RELEASE"]}],"products":[{"vendor":"pivotal","product":"spring-flex"},{"vendor":"pivotal/spring","product":"spring-flex"}],"references":[{"url":"https://codewhitesec.blogspot.com/2017/04/amf.html","tags":["x_refsource_MISC","x_transferred","Exploit","Mitigation","Third Party Advisory","web"]},{"url":"https://www.kb.cert.org/vuls/id/307983","tags":["third-party-advisory","x_refsource_CERT-VN","x_transferred","Third Party Advisory","US Government Resource","web"]},{"url":"http://www.securityweek.com/flaws-java-amf-libraries-allow-remote-code-execution","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","web"]},{"url":"https://www.securityfocus.com/bid/97376","tags":["vdb-entry","x_refsource_BID","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2017-3203","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-8v4h-j42h-wfhc"}],"sources":{"cve":[{"id":"CVE-2017-3203","title":"Pivotal/Spring Spring-flex's Action Message Format (AMF3) Java implementation is vulnerable to insecure deserialization","description":"The Java implementations of AMF3 deserializers in Pivotal/Spring Spring-flex derive class instances from java.io.Externalizable rather than the AMF3 specification's recommendation of flash.utils.IExternalizable. A remote attacker with the ability to spoof or control an RMI server connection may be able to send serialized Java objects that execute arbitrary code when deserialized.","status":"published","published":"2018-06-11T17:00:00Z","modified":"2024-08-05T14:16:28.225Z","cwes":["CWE-502"],"updated_at":"2026-11-02T14:33:16.232024Z"}],"euvd":[{"id":"EUVD-2022-3232","description":"The Java implementations of AMF3 deserializers in Pivotal/Spring Spring-flex derive class instances from java.io.Externalizable rather than the AMF3 specification's recommendation of flash.utils.IExternalizable. A remote attacker with the ability to spoof or control an RMI server connection may be able to send serialized Java objects that execute arbitrary code when deserialized.","status":"published","published":"2018-06-11T17:00:00Z","modified":"2024-08-05T14:16:28Z","updated_at":"2026-11-03T02:39:18.505086Z"}],"ghsa":[{"id":"GHSA-8v4h-j42h-wfhc","title":"Deserialization of Untrusted Data in Spring-flex","description":"The Java implementations of AMF3 deserializers in Pivotal/Spring Spring-flex derive class instances from java.io.Externalizable rather than the AMF3 specification's recommendation of flash.utils.IExternalizable. A remote attacker with the ability to spoof or control an RMI server connection may be able to send serialized Java objects that execute arbitrary code when deserialized.","status":"published","published":"2022-05-13T01:36:43Z","modified":"2023-01-27T05:02:32Z","cvss":[{"version":"3.0","score":8.1,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-502"],"updated_at":"2026-11-02T14:36:18.427692Z"}],"nvd":[{"id":"CVE-2017-3203","description":"The Java implementations of AMF3 deserializers in Pivotal/Spring Spring-flex derive class instances from java.io.Externalizable rather than the AMF3 specification's recommendation of flash.utils.IExternalizable. A remote attacker with the ability to spoof or control an RMI server connection may be able to send serialized Java objects that execute arbitrary code when deserialized.","status":"published","published":"2018-06-11T17:29:00.68Z","modified":"2026-06-17T01:17:43.69Z","cvss":[{"version":"3.0","score":8.1,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-502"],"updated_at":"2026-11-02T14:04:17.638656Z"}],"osv":[{"id":"GHSA-8v4h-j42h-wfhc","title":"Deserialization of Untrusted Data in Spring-flex","description":"The Java implementations of AMF3 deserializers in Pivotal/Spring Spring-flex derive class instances from java.io.Externalizable rather than the AMF3 specification's recommendation of flash.utils.IExternalizable. A remote attacker with the ability to spoof or control an RMI server connection may be able to send serialized Java objects that execute arbitrary code when deserialized.","status":"published","published":"2022-05-13T01:36:43Z","modified":"2023-11-08T03:59:21.022673Z","cvss":[{"version":"3.0","score":8.1,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-502"],"updated_at":"2026-11-02T15:46:42.78452Z"}]}}