CVE-2021-39149: 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
Event History
Parent advisories
This vulnerability appears in the following advisories.
Frequently Asked Questions
What is the vulnerability ID for this flaw in xstream?
The vulnerability ID for this flaw in xstream is CVE-2021-39149.
What is xstream?
XStream is a simple library used to serialize objects to XML and back again.
What is the severity of CVE-2021-39149?
The severity of CVE-2021-39149 is high with a CVSS score of 8.5.
How does CVE-2021-39149 affect users?
CVE-2021-39149 may allow a remote attacker to load and execute arbitrary code from a remote host by manipulating the processed input stream.
How can I fix the vulnerability in xstream?
To fix the vulnerability in xstream, it is recommended to upgrade to version 1.4.18.