CVE-2021-39144

Known Exploited Public Exploit
XStream is vulnerable to a Remote Command Execution attack

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 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.

Categories

8.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 94.41% Top 5%
KEV Since 
Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory debian.org Vendor Advisory github.com Vendor Advisory github.io
Affected: x-stream xstream
Published at:
Updated at:

References

Link Tags
https://github.com/x-stream/xstream/security/advisories/GHSA-j9h8-phrw-h4fh vendor advisory
https://x-stream.github.io/CVE-2021-39144.html exploit vendor advisory
https://lists.debian.org/debian-lts-announce/2021/09/msg00017.html third party advisory mailing list
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/22KVR6B5IZP3BGQ3HPWIO2FWWCKT3DHP/ release notes vendor advisory mailing list
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QGXIU3YDPG6OGTDHMBLAFN7BPBERXREB/ release notes vendor advisory mailing list
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PVPHZA7VW2RRSDCOIPP2W6O5ND254TU7/ release notes vendor advisory mailing list
https://www.debian.org/security/2021/dsa-5004 third party advisory vendor advisory
https://www.oracle.com/security-alerts/cpujan2022.html patch third party advisory
https://security.netapp.com/advisory/ntap-20210923-0003/ third party advisory
https://www.oracle.com/security-alerts/cpuapr2022.html patch third party advisory
https://www.oracle.com/security-alerts/cpujul2022.html patch third party advisory
http://packetstormsecurity.com/files/169859/VMware-NSX-Manager-XStream-Unauthenticated-Remote-Code-Execution.html third party advisory exploit vdb entry

Frequently Asked Questions

What is the severity of CVE-2021-39144?
CVE-2021-39144 has been scored as a high severity vulnerability.
How to fix CVE-2021-39144?
To fix CVE-2021-39144, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-39144 being actively exploited in the wild?
It is confirmed that CVE-2021-39144 is actively exploited. Be extra cautious if you are using vulnerable components. According to its EPSS score, there is a ~94% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-39144?
CVE-2021-39144 affects x-stream xstream.
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