CVE-2020-36193 vulnerability in Drupal and Other Products
Published on January 18, 2021
Known Exploited Vulnerability
This PEAR Archive_Tar Improper Link Resolution Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. PEAR Archive_Tar Tar.php allows write operations with directory traversal due to inadequate checking of symbolic links. PEAR stands for PHP Extension and Application Repository and it is an open-source framework and distribution system for reusable PHP components with known usage in third-party products such as Drupal Core and Red Hat Linux.
The following remediation steps are recommended / required by September 15, 2022: Apply updates per vendor instructions.
Vulnerability Analysis
CVE-2020-36193 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. This vulnerability is known to be actively exploited by threat actors in an automatable fashion. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality, a high impact on integrity, and no impact on availability.
Weakness Type
What is an insecure temporary file Vulnerability?
The software attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.
CVE-2020-36193 has been classified to as an insecure temporary file vulnerability or weakness.
Products Associated with CVE-2020-36193
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Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.