CVE-2021-39139
libxstream-java - security update
Description
XStream is a simple library to serialize objects to XML and back again. In affected versions this vulnerability may allow a remote attacker to load and execute arbitrary code from a remote host only by manipulating the processed input stream. A user is only affected if using the version out of the box with JDK 1.7u21 or below. However, this scenario can be adjusted easily to an external Xalan that works regardless of the version of the Java runtime. 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.
How to fix CVE-2021-39139
To remediate CVE-2021-39139, upgrade the affected package to a fixed version below.
- —upgrade to 1.4.15-3+deb11u1 or later
- —upgrade to 1.4.11.1-1+deb9u4 or later
- —upgrade to 1.4.11.1-1+deb10u3 or later
- —upgrade to 1.4.18 or later
Is CVE-2021-39139 being exploited?
Low — EPSS is 0.7%, meaning exploitation activity has not been observed at scale.
Affected packages (4)
- from 0, < 1.4.15-3+deb11u1
- from 0, < 1.4.11.1-1+deb9u4
- from 0, < 1.4.11.1-1+deb10u3
- from 0, < 1.4.18
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.5 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H |