CVE-2021-21341

Description

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 to fix CVE-2021-21341

To remediate CVE-2021-21341, upgrade the affected package to a fixed version below.

• —upgrade to 1.4.16 or later

Is CVE-2021-21341 being exploited?

Likely — EPSS is 77.8%, placing CVE-2021-21341 in the top tier of vulnerabilities by exploitation probability. Prioritise patching.

Affected packages (1)

• from 0, < 1.4.16

CVSS scores

References (17)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2021-21341
• PATCHgithub.com/x-stream/xstream
• WEBx-stream.github.io/changes.html#1.4.16
• WEBgithub.com/x-stream/xstream/security/advisories/GHSA-2p3x-qw9c-25hh