Zip Slip

> The vulnerability is exploited using a specially crafted archive that holds directory traversal filenames (e.g. ../../shell.php). The Zip Slip vulnerability can affect numerous archive formats, including tar, jar, war, cpio, apk, rar and 7z. The attacker can then 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.

The Zip Slip vulnerability is a critical security flaw that affects the handling of archive files, such as ZIP, TAR, or other compressed file formats. This vulnerability allows an attacker to write arbitrary files outside of the intended extraction directory, potentially overwriting critical system files, executing malicious code, or gaining unauthorized access to sensitive information. **Example**: Suppose an attacker creates a ZIP file with the following structure:

malicious.zip
  ├── ../../../../etc/passwd
  ├── ../../../../usr/local/bin/malicious_script.sh

When a vulnerable application extracts `malicious.zip`, the files are written to `/etc/passwd` and /`usr/local/bin/malicious_script.sh` instead of being contained within the extraction directory. This can have severe consequences, such as corrupting system files or executing malicious scripts. * Using [ptoomey3/evilarc](https://github.com/ptoomey3/evilarc): ```python python evilarc.py shell.php -o unix -f shell.zip -p var/www/html/ -d 15 ``` * Creating a ZIP archive containing a symbolic link: ```ps1 ln -s ../../../index.php symindex.txt zip --symlinks test.zip symindex.txt ``` For a list of affected libraries and projects, visit [snyk/zip-slip-vulnerability](https://github.com/snyk/zip-slip-vulnerability)