xstreamproject xstream CVE-2021-21343 vulnerability in Xstreamproject and Other Products
Published on March 23, 2021

XStream is vulnerable to an Arbitrary File Deletion on the local host when unmarshalling as long as the executing process has sufficient rights

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XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16, there is a vulnerability where the processed stream at unmarshalling time contains type information to recreate the formerly written objects. XStream creates therefore new instances based on these type information. An attacker can manipulate the processed input stream and replace or inject objects, that result in the deletion of a file on the local host. 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.

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Vulnerability Analysis

CVE-2021-21343 can be exploited with network access, requires user interaction. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality, a high impact on integrity, and no impact on availability.

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

Weakness Types

External Control of File Name or Path

The software allows user input to control or influence paths or file names that are used in filesystem operations.

What is a Marshaling, Unmarshaling Vulnerability?

The application deserializes untrusted data without sufficiently verifying that the resulting data will be valid.

CVE-2021-21343 has been classified to as a Marshaling, Unmarshaling vulnerability or weakness.


Products Associated with CVE-2021-21343

You can be notified by email with stack.watch whenever vulnerabilities like CVE-2021-21343 are published in these products:

Xstreamproject Xstream
 
Debian Linux
 
Canonical Ubuntu Linux
 
Fedora Project Fedora
 
Oracle Banking Enterprise Default Management
 
Oracle Banking Platform
 
Oracle Banking Virtual Account Management
 
Oracle Business Activity Monitoring
 
Oracle Communications Billing Revenue Management Elastic Charging Engine
 
Oracle Communications Policy Management
 
Oracle Communications Unified Inventory Management
 
Oracle Retail Xstore Point Of Service
 
Oracle Webcenter Portal
 
NetApp Oncommand Insight
 
Apache ActiveMQ
 
Apache JMeter
 
Xstream
 

Affected Versions

x-stream xstream Version < 1.4.16 is affected by CVE-2021-21343

Vulnerable Packages

The following package name and versions may be associated with CVE-2021-21343

Package Manager Vulnerable Package Versions Fixed In
maven com.thoughtworks.xstream:xstream < 1.4.16 1.4.16

Exploit Probability

EPSS
0.69%
Percentile
71.36%

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.