CVE-2021-21341

XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16, there is vulnerability which may allow a remote attacker to allocate 100% CPU time on the target system depending on CPU type or parallel execution of such a payload resulting in a denial of service 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. If you rely on XStream's default blacklist of the Security Framework, you will have to use at least version 1.4.16.

• How can I get the fixes?
• What do statuses mean?

References

• MITRE
• NVD
• Launchpad
• Debian

Related Ubuntu Security Notices (USN)

• USN-4943-1
• XStream vulnerabilities
• 11 May 2021
• USN-6978-1
• XStream vulnerabilities
• 22 August 2024

Other references

• https://github.com/x-stream/xstream/security/advisories/GHSA-2p3x-qw9c-25hh
• http://x-stream.github.io/changes.html#1.4.16
• https://x-stream.github.io/CVE-2021-21341.html
• https://x-stream.github.io/security.html#workaround
• https://www.cve.org/CVERecord?id=CVE-2021-21341