x-stream · xstream
The XStream Java library for serializing objects to XML and back has an arbitrary code execution flaw caused by deserialization of untrusted data, affecting versions before 1.4.16 when relying on the default blacklist of its security framework. A remote attacker who can supply crafted input to the processed XML stream can cause arbitrary code to be loaded and executed from a remote host, and exploitation requires user interaction.
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.
Disclosed on 22 Mar 2021. No public exploit code or confirmed exploitation is recorded.
No ATT&CK techniques are linked to this CVE yet. MITRE CTID has not mapped it, and no report passage in the corpus ties it to a technique.
1 package in 1 ecosystem. Main package: com.thoughtworks.xstream:xstream.
Upgrade to 1.4.18 or later
Fixes this CVE and 12 other known vulnerabilities in this package (CVE-2013-7285, CVE-2019-10173, +10).
Set the version to 1.4.18 or later in your pom.xml or build.gradle.
First fixed in 1.4.16 for CVE-2021-21344.
| If you run | Upgrade to |
|---|---|
| All versions before 1.4.16 | 1.4.18first fix for this CVE: 1.4.16 |
“Up to” means the second version is the fix and is not affected.