Arbitrary File Write via Archive Extraction (Zip Slip) Affecting com.alibaba.oneagent:one-java-agent-plugin Open this link in a new tab package, versions [0,]


0.0
medium
  • Exploit Maturity

    Proof of concept

  • Attack Complexity

    High

  • User Interaction

    Required

  • Scope

    Changed

  • Confidentiality

    High

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • snyk-id

    SNYK-JAVA-COMALIBABAONEAGENT-2407874

  • published

    21 Apr 2022

  • disclosed

    21 Feb 2022

  • credit

    Akhil Jain

How to fix?

A fix was pushed into the master branch but not yet published.

Overview

Affected versions of this package are vulnerable to Arbitrary File Write via Archive Extraction (Zip Slip) using a specially crafted archive that holds directory traversal filenames (e.g. ../../evil.exe). The attacker can overwrite executable files and either invoke them remotely or wait for the system or user to call them, thus achieving remote command execution on the victim’s machine.

PoC:

// ZIpslip.class

import java.io.IOException;

import com.alibaba.oneagent.utils.*;

public class ZIpslip {

public static void main(String[] args) {

try {
IOUtils.unzip("C:evil.zip", "D:zipzipzip"); //evil.zip contains ../../evil.exe
} catch (IOException e) {
e.printStackTrace();
}

}
}

Details

It is exploited using a specially crafted zip archive, that holds path traversal filenames. When exploited, a filename in a malicious archive is concatenated to the target extraction directory, which results in the final path ending up outside of the target folder. For instance, a zip may hold a file with a "../../file.exe" location and thus break out of the target folder. If an executable or a configuration file is overwritten with a file containing malicious code, the problem can turn into an arbitrary code execution issue quite easily.

The following is an example of a zip archive with one benign file and one malicious file. Extracting the malicous file will result in traversing out of the target folder, ending up in /root/.ssh/ overwriting the authorized_keys file:


+2018-04-15 22:04:29 ..... 19 19 good.txt

+2018-04-15 22:04:42 ..... 20 20 ../../../../../../root/.ssh/authorized_keys