XStream is a simple library to serialize objects to XML and back again. In affected versions this vulnerability may allow a remote attacker to load and execute arbitrary code from a remote host only by manipulating the processed input stream. A user is only affected if using the version out of the box with JDK 1.7u21 or below. However, this scenario can be adjusted easily to an external Xalan that works regardless of the version of the Java runtime. 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.
CVE-2021-39139 - High Severity Vulnerability
Vulnerable Library - xstream-1.4.8.jar
XStream is a serialization library from Java objects to XML and back.
Library home page: http://xstream.codehaus.org
Path to vulnerable library: /target/libs/provided/xstream-1.4.8.jar
Dependency Hierarchy: - :x: **xstream-1.4.8.jar** (Vulnerable Library)
Found in base branch: main
Vulnerability Details
XStream is a simple library to serialize objects to XML and back again. In affected versions this vulnerability may allow a remote attacker to load and execute arbitrary code from a remote host only by manipulating the processed input stream. A user is only affected if using the version out of the box with JDK 1.7u21 or below. However, this scenario can be adjusted easily to an external Xalan that works regardless of the version of the Java runtime. 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.
Publish Date: 2021-08-23
URL: CVE-2021-39139
CVSS 3 Score Details (8.5)
Base Score Metrics: - Exploitability Metrics: - Attack Vector: Network - Attack Complexity: High - Privileges Required: Low - User Interaction: None - Scope: Changed - Impact Metrics: - Confidentiality Impact: High - Integrity Impact: High - Availability Impact: High
For more information on CVSS3 Scores, click here.Suggested Fix
Type: Upgrade version
Origin: https://github.com/x-stream/xstream/security/advisories/GHSA-64xx-cq4q-mf44
Release Date: 2021-08-23
Fix Resolution: 1.4.18
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