Critical Remote Command Execution Vulnerability in libxstream-java
Summary
DEBIAN-CVE-2021-29505: XStream is software for serializing Java objects to XML and back again. Affects libxstream-java versions < 1.4.15-3. Fixed in 1.4.15-3. How to fix ↓
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Background
libxstream-java is a Java library that facilitates the serialization of Java objects to XML and vice versa. It is widely used for data interchange in Java applications. The library provides features such as customizable serialization, support for complex object graphs, and the ability to handle various data types. However, certain versions of libxstream-java are vulnerable to a security flaw that could allow unauthorized remote command execution, making it crucial for users to be aware of this issue.
Vulnerability Detail
The vulnerability in libxstream-java arises from its handling of input streams in versions prior to 1.4.17. A remote attacker with sufficient rights could exploit this flaw by manipulating the processed input stream, potentially leading to the execution of arbitrary commands on the host system. This vulnerability poses significant risks, especially if the security framework of XStream is not properly configured to limit the types of objects that can be deserialized.
How To Fix
Minimum fixed version
1.4.15-3
This is the first release that contains the fix.
sudo apt-get install --only-upgrade libxstream-javaTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, users are advised to implement XStream's security framework by setting up a whitelist that limits the types of objects that can be deserialized. This can help mitigate the risk of exploitation until the package is updated.
Conclusion
The libxstream-java library has a critical vulnerability that could allow remote command execution if not addressed. Users are strongly encouraged to update to version 1.4.17 or later and to implement security measures to protect their applications. Staying informed and proactive is essential to maintaining the security of your systems.
See every vulnerability recorded for libxstream-java →
FAQ
Versions prior to 1.4.17 of libxstream-java are affected by this vulnerability.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
If exploited, this vulnerability could allow an attacker to execute arbitrary commands on the host system, leading to data breaches or system compromise.
Yes, implementing XStream's security framework with a whitelist of allowed types can help mitigate the risk until an update is applied.
Detailed information can be found in the Debian CVE database at https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2021-29505.json.
References
Related vulnerabilities
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