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:
github.com/x-stream/xstream
github.com/x-stream/xstream/security/advisories/GHSA-2q8x-2p7f-574v
lists.debian.org/debian-lts-announce/2021/09/msg00017.html
lists.fedoraproject.org/archives/list/[email protected]/message/22KVR6B5IZP3BGQ3HPWIO2FWWCKT3DHP
lists.fedoraproject.org/archives/list/[email protected]/message/PVPHZA7VW2RRSDCOIPP2W6O5ND254TU7
lists.fedoraproject.org/archives/list/[email protected]/message/QGXIU3YDPG6OGTDHMBLAFN7BPBERXREB
nvd.nist.gov/vuln/detail/CVE-2021-39153
security.netapp.com/advisory/ntap-20210923-0003
www.debian.org/security/2021/dsa-5004
www.oracle.com/security-alerts/cpuapr2022.html
www.oracle.com/security-alerts/cpujan2022.html
www.oracle.com/security-alerts/cpujul2022.html
x-stream.github.io/CVE-2021-39153.html