high
7.5
CWE
400 770
Advisory Published
CVE Published
Updated

CVE-2021-43859: Denial of Service by injecting highly recursive collections or maps in XStream

First published: Sat Jan 29 2022(Updated: )

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.

Credit: security-advisories@github.com

Affected SoftwareAffected VersionHow to fix
redhat/jenkins<0:2.319.3.1650348949-1.el7
0:2.319.3.1650348949-1.el7
redhat/xstream<1.4.19
1.4.19
Xstream Project Xstream<1.4.19
Fedoraproject Fedora=34
Fedoraproject Fedora=35
Debian Debian Linux=9.0
Oracle Commerce Guided Search=11.3.2
Oracle Communications Brm - Elastic Charging Engine<12.0.0.4.6
Oracle Communications Brm - Elastic Charging Engine=12.0.0.5.0
Oracle Communications Cloud Native Core Automated Test Suite=1.9.0
Oracle Communications Diameter Intelligence Hub>=8.0.0<=8.1.0
Oracle Communications Diameter Intelligence Hub>=8.2.0<=8.2.6
Oracle Communications Policy Management=12.6.0.0.0
Oracle FLEXCUBE Private Banking=12.1.0
Oracle Retail Xstore Point of Service=16.0.6
Oracle Retail Xstore Point of Service=17.0.4
Oracle Retail Xstore Point of Service=18.0.3
Oracle Retail Xstore Point of Service=19.0.2
Oracle Retail Xstore Point of Service=20.0.1

Remedy

https://github.com/x-stream/xstream/commit/e8e88621ba1c85ac3b8620337dd672e0c0c3a846

Remedy

https://www.oracle.com/security-alerts/cpuapr2022.html

Remedy

https://www.oracle.com/security-alerts/cpujul2022.html

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is CVE-2021-43859?

    CVE-2021-43859 is a vulnerability in XStream, an open source Java library, that allows a remote attacker to allocate 100% CPU time on the target system resulting in a denial of service.

  • What is the severity of CVE-2021-43859?

    CVE-2021-43859 has a severity rating of 7.5 out of 10, which is considered high.

  • How does CVE-2021-43859 affect XStream?

    CVE-2021-43859 affects XStream versions prior to 1.4.19.

  • How can I fix CVE-2021-43859?

    To fix CVE-2021-43859, update XStream to version 1.4.19 or later.

  • Where can I find more information about CVE-2021-43859?

    You can find more information about CVE-2021-43859 on the GitHub Security Advisory page and the XStream CVE-2021-43859 page.

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