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CVE-2021-39140

Publication date 23 August 2021

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

6.3 · Medium

Score breakdown

XStream is a simple library to serialize objects to XML and back again. In affected versions this vulnerability may allow a remote attacker to allocate 100% CPU time on the target system depending on CPU type or parallel execution of such a payload resulting in a denial of service only by manipulating the processed input stream. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. XStream 1.4.18 uses no longer a blacklist by default, since it cannot be secured for general purpose.

Read the notes from the security team

Status

Package Ubuntu Release Status
libxstream-java 23.04 lunar
Not affected
22.10 kinetic
Not affected
22.04 LTS jammy
Not affected
21.10 impish Ignored end of life
21.04 hirsute Ignored end of life
20.04 LTS focal
Fixed 1.4.11.1-1ubuntu0.3
18.04 LTS bionic
Fixed 1.4.11.1-1+deb10u4build0.18.04.1
16.04 LTS xenial
Not affected
14.04 LTS trusty
Not affected

Notes

sahnaseredini

for `trusty` and `xenial`, the code is not present and the available pocs cannot be exploited

Severity score breakdown

Parameter Value
Base score 6.3 · Medium
Attack vector Network
Attack complexity High
Privileges required Low
User interaction None
Scope Changed
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H