CVE-2020-28949 vulnerability in Drupal and Other Products
Published on November 19, 2020
Known Exploited Vulnerability
This PEAR Archive_Tar Deserialization of Untrusted Data Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. PEAR Archive_Tar allows an unserialization attack because phar: is blocked but PHAR: is not blocked. 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-2020-28949 can be exploited with local system access, requires user interaction. This vulnerability is considered to have a low attack complexity. This vulnerability is known to be actively exploited by threat actors. The potential impact of an exploit of this vulnerability is considered to be very high.
Products Associated with CVE-2020-28949
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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.