XStream is vulnerable to a Remote Command Execution attack
CVE-2021-21345

9.9CRITICAL

Key Information:

Vendor

X-stream

Status
Xstream
Vendor
CVE Published:
23 March 2021

What is CVE-2021-21345?

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 who has sufficient rights to execute commands of the 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

86% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
9.9
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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CVE-2021-21345 : XStream is vulnerable to a Remote Command Execution attack