CVE-2021-43859
libxstream-java - security update
Description
XStream is an open source java library to serialize objects to XML and back again. Versions prior to 1.4.19 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. XStream 1.4.19 monitors and accumulates the time it takes to add elements to collections and throws an exception if a set threshold is exceeded. Users are advised to upgrade as soon as possible. Users unable to upgrade may set the NO_REFERENCE mode to prevent recursion. See GHSA-rmr5-cpv2-vgjf for further details on a workaround if an upgrade is not possible.
How to fix CVE-2021-43859
To remediate CVE-2021-43859, upgrade the affected package to a fixed version below.
- —upgrade to 2.319.3 or later
- —upgrade to 1.4.15-3+deb11u3 or later
- —upgrade to 1.4.11.1-1+deb9u5 or later
- —upgrade to 1.4.15-3+deb11u3 or later
- —upgrade to 1.4.19 or later
Is CVE-2021-43859 being exploited?
Low — EPSS is 1.9%, meaning exploitation activity has not been observed at scale.
Affected packages (5)
- from 0, < 2.319.3, >= 2.321.0, < 2.334.0
- from 0, < 1.4.15-3+deb11u3
- from 0, < 1.4.11.1-1+deb9u5
- from 0, < 1.4.15-3+deb11u3
- from 0, < 1.4.19
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |