High severity · published Jun 11, 2018
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…
8.1
CVSS
6.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)6.2% · higher than 94% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SP
Spring-flex · Pivotal
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-3203
CVE.org
https://www.cve.org/CVERecord?id=CVE-2017-3203
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