Apache Ant - Information Leakage and Source Code Injection
Summary
CVE-2020-1945: Apache Ant 1.1 to 1.9.14 and 1.10.0 to 1.10.7 uses the default temporary directory identified by the Java system property java.io.tmpdir for several tasks and may thus leak sensitive information. Affects ant versions < 1.10.8-1. Fixed in 1.10.8-1. How to fix ↓
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Background
Apache Ant is a popular Java-based build tool used for automating software build processes. It provides a set of tasks and libraries that enable developers to compile, test, and package their applications. However, versions 1.1 to 1.9.14 and 1.10.0 to 1.10.7 of Apache Ant have a vulnerability that can lead to information leakage and source code injection.
Vulnerability Detail
The vulnerability in Apache Ant arises from its use of the default temporary directory, which is identified by the Java system property java.io.tmpdir. This directory is used for various tasks within Apache Ant. However, due to improper handling, sensitive information can be leaked through this directory. Additionally, the fixcrlf and replaceregexp tasks in Apache Ant copy files from the temporary directory back into the build tree. This allows an attacker to inject modified source files into the build process, potentially leading to the execution of malicious code.
How To Fix
Minimum fixed version
1.10.8-1
This is the first release that contains the fix.
sudo apt-get install --only-upgrade antTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If upgrading to the latest version is not immediately feasible, a temporary workaround can be implemented. The workaround involves manually setting the temporary directory to a secure location, different from the default java.io.tmpdir. This can be done by modifying the Ant build script or by setting the JAVA_OPTS environment variable with the -Djava.io.tmpdir flag. By specifying a secure temporary directory, the risk of information leakage and source code injection can be mitigated.
Conclusion
The vulnerability in Apache Ant can result in information leakage and source code injection. It is crucial to upgrade to the latest version of Apache Ant (1.10.8 or later) to mitigate these risks. Alternatively, a temporary workaround can be implemented by setting a secure temporary directory. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
Apache Ant is a Java-based build tool used for automating software build processes. It provides a set of tasks and libraries that enable developers to compile, test, and package their applications.
Versions 1.1 to 1.9.14 and 1.10.0 to 1.10.7 of Apache Ant are affected by this vulnerability.
This vulnerability can lead to information leakage and source code injection. Attackers can potentially access sensitive information and inject malicious source code into the build process.
To fix this vulnerability, it is recommended to upgrade to Apache Ant version 1.10.8 or later. This version includes the necessary fixes to address the information leakage and source code injection issues.
Yes, if upgrading to the latest version is not immediately feasible, a temporary workaround can be implemented by manually setting the temporary directory to a secure location, different from the default java.io.tmpdir.
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