Recently, XStream released a security advisory that fixes a remote code execution vulnerability (CVE-2020-26217). The vulnerability may allow a remote attacker to execute arbitrary code by sending crafted requests to the web application that uses XStream and thereby taking control of the target server. XStream is a commonly used tool for converting between Java objects and XML.
The vulnerability is a variation of CVE-2013-7285. This time, it uses a different set of classes to bypass blacklist restriction in the deserialization process, thus leading to remote code execution.
- XStream: XStream versions <= 1.4.13
- XStream: XStream version 1.4.14
The vendor has released the latest versions to fix this vulnerability. Affected users are advised to upgrade as soon as possible.
The latest versions are available at the following link: https://github.com/x-stream/xstream/releases.
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