Deserialization in Pivotal Spring-Flex
CVE-2017-3203
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.
Vulnerability class: Insecure Deserialization
EPSS: 0.063 (92.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Pivotal Spring-flex
- Pivotal/spring Spring-flex — versions 0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cret@cert.org (Exploit, Third Party Advisory, x_refsource_MISC, Mitigation)
- 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-2017-3203?
- CVE-2017-3203 is a high-severity vulnerability in Pivotal Spring-Flex, classified under Deserialization of Untrusted Data. CVSS score: 8.1/10. Published 2018-06-11.
- How severe is CVE-2017-3203?
- High severity. CVSS v3 base score is 8.1 out of 10.
- Is CVE-2017-3203 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.