CVE-2016-4000

Publication date 6 July 2017

Last updated 25 August 2025

Ubuntu priority

Why this priority?

Cvss 3 Severity Score

Score breakdown

Description

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

Status

Show unmaintained releases

Package	Ubuntu Release	Status
jython	17.04 zesty	Fixed 2.5.3-15ubuntu0.1
	16.10 yakkety	Ignored end of life
	16.04 LTS xenial	Fixed 2.5.3-9ubuntu0.1
	14.04 LTS trusty	Fixed 2.5.3-1ubuntu0.1

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
jython	Upstream: https://hg.python.org/jython/rev/d06e29d100c0

Severity score breakdown

CVSS version: CVSS v3.0

Base score 9.8 · Critical

Base metrics

Parameter	Value
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality impact	High
Integrity impact	High
Availability impact	High

Scores

Parameter	Value
Base score	9.8 · Critical
Exploitability score	-
Impact score	-

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Other references

https://www.cve.org/CVERecord?id=CVE-2016-4000

Access our resources on patching vulnerabilities