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Vulnerability · Published Mar 22, 2021 · Assigned by GitHub_M

CVE-2021-21341XStream can cause a Denial of Service

High 7.5

In plain English

A high-severity uncontrolled resource consumption in xstream from x-stream. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 77.8% (higher than 99.6% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)77.8%top 0.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack tooling1Public PoC

Official description

XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16, there is vulnerability which 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. If you rely on XStream's default blacklist of the Security Framework, you will have to use at least version 1.4.16.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12libxstream-java1.4.15-2DEBIAN-CVE-2021-21341
Debian:13libxstream-java1.4.15-2DEBIAN-CVE-2021-21341
Debian:14libxstream-java1.4.15-2DEBIAN-CVE-2021-21341
Mavencom.thoughtworks.xstream:xstream1.4.16GHSA-2p3x-qw9c-25hh

Affected products (as reported)

VendorProductVersions
x-stream xstream < 1.4.16

Weakness: CWE-400, CWE-502 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References