CVE-2022-40977: VDE-2022-033 | CERT@VDE

2022-11-24 10:00 (CET) VDE-2022-033

Pilz: PASvisu and PMI affected by multiple vulnerabilities
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Published

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2022-11-24 10:00 (CET)

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Last update

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2022-11-17 15:32 (CET)

Vendor(s)

Pilz GmbH & Co. KG

Product(s)

Article No°

Product Name

Affected Version(s)

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PASvisu Software

< 1.12.0

265507

PMI v5xx

<= 1.3.58

265512

PMI v5xx

<= 1.3.58

266704

PMI v7xx

< 2.2.0

266707

PMI v7xx

< 2.2.0

266807

PMI v8xx

< 1.6.102

266812

PMI v8xx

< 1.6.102

266815

PMI v8xx

< 1.6.102

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Summary

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PASvisu is an HMI solution for Machine Visualization. It is available as a standalone software product, but it is also included in various models of the PMI product family. The PASvisu Server component contains multiple vulnerabilities which can be utilised to write arbitrary files, potentially leading to code execution.

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Vulnerabilities

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Last Update

Sept. 30, 2022, 8:41 a.m.

Weakness

Files or Directories Accessible to External Parties (CWE-552)

Summary

This affects the package cesanta/mongoose before 7.6. The unsafe handling of file names during upload using mg_http_upload() method may enable attackers to write files to arbitrary locations outside the designated target folder.

Last Update

Nov. 10, 2022, 11:47 a.m.

Weakness

Improper Limitation of a Pathname to a Restricted Directory (‘Path Traversal’) (CWE-22)

Summary

A path traversal vulnerability was discovered in Pilz PASvisu Server before 1.12.0. An unauthenticated remote attacker could use a zipped, malicious configuration file to trigger arbitrary file writes (‘zip-slip’).

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Impact

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The PASvisu Server provides an integrated web server which is also used to send the configuration from the PASvisu Builder to the server component. When receiving and processing a configuration, it does not properly check pathnames. If the PASvisu Server is not properly protected by setting an administration password, the listed vulnerabilities can be exploited by an attacker to write arbitrary files. In the worst case scenario this could lead to remote code execution.

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Solution

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General Countermeasures

• Restrict HTTP and HTTPS traffic to the PASvisu Server by using a firewall or other measures on the network level.

Product-specific Countermeasures

• PASvisu software, PMI v7xx, PMI v8xx: Configure an administration password.
• PASvisu, PMI v7xx, PMI v8xx: Install the fixed version as soon as it is available. Please visit the Pilz Shop (www.pilz.com/enINT/eshop) to check for a fixed version.

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Reported by

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Pilz would like to thank CERT@VDE for coordinating publication.