xstreamproject xstream CVE-2021-43859 vulnerability in Xstreamproject and Other Products
Published on February 1, 2022

Denial of Service by injecting highly recursive collections or maps in XStream

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XStream is an open source java library to serialize objects to XML and back again. Versions prior to 1.4.19 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. XStream 1.4.19 monitors and accumulates the time it takes to add elements to collections and throws an exception if a set threshold is exceeded. Users are advised to upgrade as soon as possible. Users unable to upgrade may set the NO_REFERENCE mode to prevent recursion. See GHSA-rmr5-cpv2-vgjf for further details on a workaround if an upgrade is not possible.

Github Repository Vendor Advisory Vendor Advisory NVD

Vulnerability Analysis

CVE-2021-43859 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. An automatable proof of concept (POC) exploit exists. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.

Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
NONE
Integrity Impact:
NONE
Availability Impact:
HIGH

Weakness Type

What is a Resource Exhaustion Vulnerability?

The software does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.

CVE-2021-43859 has been classified to as a Resource Exhaustion vulnerability or weakness.


Products Associated with CVE-2021-43859

You can be notified by email with stack.watch whenever vulnerabilities like CVE-2021-43859 are published in these products:

Xstreamproject Xstream
 
Fedora Project Fedora
 
Debian Linux
 
Oracle Flexcube Private Banking
 
Oracle Commerce Guided Search
 
Oracle Retail Xstore Point Of Service
 
Oracle Communications Cloud Native Core Automated Test Suite
 
Oracle Communications Policy Management
 
Oracle Communications Diameter Intelligence Hub
 
Oracle Communications Brm Elastic Charging Engine
 
Jenkins
 
Xstream
 

Affected Versions

x-stream xstream Version < 1.4.19 is affected by CVE-2021-43859

Vulnerable Packages

The following package name and versions may be associated with CVE-2021-43859

Package Manager Vulnerable Package Versions Fixed In
maven com.thoughtworks.xstream:xstream < 1.4.19 1.4.19

Exploit Probability

EPSS
1.88%
Percentile
82.85%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.