Summary
PAS4000 is the software platform for the Automation System PSS 4000. PAS 4000 does not properly check pathnames contained in archives. An attacker can utilise this vulnerability to write arbitrary files, potentially leading to code execution.
Details
Impact
PAS 4000 uses ZIP archives to save and load project backups and libraries. Also, ZIP archives are used as a container for firmware updates.
When loading a ZIP archive the contained pathnames are not checked properly for relative path components. If a user loads a manipulated ZIP archive, the vulnerability can be used to place potentially malicious files outside of the application's working directory.
Depending on the user's privileges this can lead to code execution.
Remediation
Install the fixed version as soon as it is available. Please visit the Pilz Shop (www.pilz.com/en-INT/eshop) to check for the fixed version
Vulnerabilities 2
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Medium 6.5
Improper Limitation of a Pathname to a Restricted Directory in Zip4j
zip4j before 1.3.3 is vulnerable to directory traversal, allowing attackers to write to arbitrary files via a ../ (dot dot slash) in a Zip archive entry that is mishandled during extraction. This vulnerability is also known as 'Zip-Slip'.
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Medium 5.5
PILZ: Multiple products affected by ZipSlip
A path traversal vulnerability was discovered in multiple Pilz products. An unauthenticated local attacker could use a zipped, malicious configuration file to trigger arbitrary file writes ('zip-slip'). File writes do not affect confidentiality or availabilit…
Revision history
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#2
Fix: quotation mark
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#1
Initial revision.
References
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VDE-2022-045: Pilz: PAS 4000 prone to ZipSlip - HTML
https://certvde.com/en/advisories/VDE-2022-045/
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Vendor PSIRT
https://www.pilz.com
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CERT@VDE Security Advisories for Pilz GmbH & Co. KG
https://certvde.com/en/advisories/vendor/pilz/