CVE-2021-39141: XStream is vulnerable to an Arbitrary Code Execution attack
A flaw was found in xstream, a simple library used to serialize objects to XML and back again. This flaw allows a remote attacker to load and execute arbitrary code from a remote host by manipulating the processed input stream. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
Other sources
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. 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.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
redhat/xstreamto a version that resolves this vulnerability.Fixed in 0:1.3.1-16.el7_9 - Upgrade
Upgrade
debian/libxstream-javato a version that resolves this vulnerability.Fixed in 1.4.11.1-1+deb10u3Fixed in 1.4.11.1-1+deb10u4Fixed in 1.4.15-3+deb11u2Fixed in 1.4.20-1 - Upgrade
Upgrade
redhat/xstreamto a version that resolves this vulnerability.Fixed in 1.4.18 - Upgrade
Upgrade
XStreamto a version that resolves this vulnerability.Fixed in 1.4.18 - Configuration
Set up XStream's security framework and restrict the type whitelist to only the minimal required types (per the recommendation in the advisory text).
XStream security framework with whitelist limited to the minimal required types = configured with a whitelist limited to the minimal required types
Event History
Parent advisories
This vulnerability appears in the following advisories.
Frequently Asked Questions
What is CVE-2021-39141?
CVE-2021-39141 is a vulnerability found in xstream, a library used to serialize objects to XML and back again. It allows a remote attacker to load and execute arbitrary code by manipulating the input stream.
What is the severity of CVE-2021-39141?
The severity of CVE-2021-39141 is high, with a CVSS score of 8.5.
How does CVE-2021-39141 affect users?
No user is affected if they followed the recommendation to update to version 1.3.1-16.el7_9 or version 1.4.18.
Where can I find more information about CVE-2021-39141?
You can find more information about CVE-2021-39141 on the CVE website, NIST National Vulnerability Database, and the GitHub security advisory page.
How can I fix CVE-2021-39141?
To fix CVE-2021-39141, update to version 1.3.1-16.el7_9 or version 1.4.18 of xstream.