CVE-2017-3203

moderate-risk
Published 2018-06-11

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.

Do I need to act?

!
13.4% chance of exploitation in next 30 days
EPSS score — higher than 87% of all CVEs
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
8
CVSS 8.1/10 High
NETWORK / HIGH complexity

Affected Products (1)

Affected Vendors

Pivotal

References (8)

Third Party Advisory http://www.securityweek.com/flaws-java-amf-libraries-allow-remote-code-execution
Exploit https://codewhitesec.blogspot.com/2017/04/amf.html
Third Party Advisory https://www.kb.cert.org/vuls/id/307983
Third Party Advisory https://www.securityfocus.com/bid/97376
Third Party Advisory http://www.securityweek.com/flaws-java-amf-libraries-allow-remote-code-execution
Exploit https://codewhitesec.blogspot.com/2017/04/amf.html
Third Party Advisory https://www.kb.cert.org/vuls/id/307983
Third Party Advisory https://www.securityfocus.com/bid/97376
41
/ 100
moderate-risk
Severity 24/34 · High
Exploitability 12/34 · Low
Exposure 5/34 · Minimal