XStream is vulnerable to an Arbitrary Code Execution attack
CVE-2021-21344

9.8CRITICAL

Key Information:

Vendor

X-stream

Status
Xstream
Vendor
CVE Published:
23 March 2021

What is CVE-2021-21344?

XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16, there is a vulnerability which may allow a remote attacker to load and execute arbitrary code from a remote host 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 Version(s)

xstream < 1.4.16

References

https://x-stream.github.io/security.html#workaround
x_refsource_MISC
http://x-stream.github.io/changes.html#1.4.16
x_refsource_MISC
https://github.com/x-stream/xstream/security/advisories/G...
x_refsource_CONFIRM

EPSS Score

28% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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CVE-2021-21344 : XStream is vulnerable to an Arbitrary Code Execution attack