Vulnerabilities
Misconfiguration
Compliance
CVE Vulnerabilities

CVE-2016-4000

Deserialization of Untrusted Data

Published: Jul 06, 2017 | Modified: Apr 20, 2025
CVSS 3.x
9.8
CRITICAL
Source:
NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
7.5 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P
RedHat/V2
RedHat/V3
8.1 IMPORTANT
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Ubuntu
MEDIUM
Vulnerability-free packages from our partners
Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2016-4000
CWEhttps://cwe.mitre.org/data/definitions/502.html

Jython before 2.7.1rc1 allows attackers to execute arbitrary code via a crafted serialized PyFunction object.

Weakness

The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

Affected Software

Name Vendor Start Version End Version
Jython Jython_project 2.7.0 (including) 2.7.0 (including)
Jython Ubuntu devel *
Jython Ubuntu esm-apps/xenial *
Jython Ubuntu trusty *
Jython Ubuntu upstream *
Jython Ubuntu xenial *
Jython Ubuntu yakkety *
Jython Ubuntu zesty *

Potential Mitigations

  • Make fields transient to protect them from deserialization.
  • An attempt to serialize and then deserialize a class containing transient fields will result in NULLs where the transient data should be. This is an excellent way to prevent time, environment-based, or sensitive variables from being carried over and used improperly.

References

Aqua Security is the largest pure-play cloud native security company, providing customers the freedom to innovate and run their businesses with minimal friction. The Aqua Cloud Native Security Platform provides prevention, detection, and response automation across the entire application lifecycle to secure the build, secure cloud infrastructure and secure running workloads wherever they are deployed.
Copyright © 2025 Aqua Security Software Ltd.   Privacy Policy | Terms of Use