Deserialization of Untrusted Data Affecting libxstream-java package, versions <1.4.11.1-1ubuntu0.2


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.69% (80th percentile)

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  • Snyk IDSNYK-UBUNTU2004-LIBXSTREAMJAVA-1124758
  • published11 May 2021
  • disclosed23 Mar 2021

Introduced: 23 Mar 2021

CVE-2021-21343  (opens in a new tab)
CWE-502  (opens in a new tab)
CWE-73  (opens in a new tab)

How to fix?

Upgrade Ubuntu:20.04 libxstream-java to version 1.4.11.1-1ubuntu0.2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libxstream-java package and not the libxstream-java package as distributed by Ubuntu. See How to fix? for Ubuntu:20.04 relevant fixed versions and status.

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.

References

CVSS Scores

version 3.1