CVE-2021-43859highCWE-400

CVE-2021-43859: high-severity vulnerability in x-stream xstream

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

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21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 7.5epss 7.9%
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
x-stream · xstream
Related CVEs — x-stream xstream

In the same product, most dangerous first.

CVE-2021-39144HIGHXStream is vulnerable to a Remote Command Execution attackEPSS 98.1%KEVCVE-2020-26217HIGHRemote Code Execution in XStreamEPSS 85.0%CVE-2020-26259MEDIUMXStream is vulnerable to an Arbitrary File Deletion on the local host when unmarshallingEPSS 82.4%CVE-2021-21351MEDIUMXStream is vulnerable to an Arbitrary Code Execution attackEPSS 82.1%CVE-2020-26258MEDIUMServer-Side Forgery Request can be activated unmarshalling with XStreamEPSS 81.8%CVE-2021-21341HIGHXStream can cause a Denial of ServiceEPSS 77.8%