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| Rule General Information |
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| Release Date: | 2023-02-23 | |
| Rule Name: | XStream Deserialization Vulnerability (CVE-2021-39144) | |
| Severity: | ||
| CVE ID: | ||
| Rule Protection Details |
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| Description: | XStream is a simple library to serialize objects to XML and back again. In affected versions this vulnerability may allow a remote attacker 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 allowlist limited to the minimal required types. XStream 1.4.18 uses no longer a blocklist by default, since it cannot be secured for general purpose. | |
| Impact: | An attacker can carefully construct malicious serialized data and pass it to the application, and execute the malicious code constructed by the attacker when the application deserializes the object. | |
| Affected OS: | Windows, Linux, Others | |
| Reference: | http://packetstormsecurity.com/files/169859/VMware-NSX-Manager-XStream-Unauthenticated-Remote-Code-Execution.html https://github.com/x-stream/xstream/security/advisories/GHSA-j9h8-phrw-h4fh https://lists.debian.org/debian-lts-announce/2021/09/msg00017.html https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/22KVR6B5IZP3BGQ3HPWIO2FWWCKT3DHP/ |
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| Solutions |
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| Refer to the announcement or patch by the vendor: https://x-stream.github.io/CVE-2021-39144.html |