The vulnerability may allow a remote attacker to load and execute arbitrary code from a remote host only by manipulating the processed input stream, if using the version out of the box with Java runtime version 14 to 8 or with JavaFX installed. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types.
XStream 1.4.18 uses no longer a blacklist by default, since it cannot be secured for general purpose.
See workarounds for the different versions covering all CVEs.
See full information about the nature of the vulnerability and the steps to reproduce it in XStream's documentation for CVE-2021-39153.
Ceclin and YXXX from the Tencent Security Response Center found and reported the issue to XStream and provided the required information to reproduce it.
If you have any questions or comments about this advisory:
* Open an issue in XStream
* Contact us at XStream Google Group
| Score | Percentile |
|---|---|
| 0.67% | 71.08% |
| Base score | Version | Severity | Vector |
|---|---|---|---|
| 8.6 | 3.1 | — |
|
| Type | Value |
|---|---|
| GHSA | GHSA-2q8x-2p7f-574v ↗ |
| CVE | CVE-2021-39153 ↗ |
| CWE id | Name |
|---|---|
| CWE-502 | Deserialization of Untrusted Data |
Vulnerable version ranges and first patched releases as published by GitHub.
| Ecosystem | Package | Vulnerable range | First patched | Vulnerable functions |
|---|---|---|---|---|
| maven | com.thoughtworks.xstream:xstream | < 1.4.18 | 1.4.18 | — |