CVE-2020-28949
PE
PEAR Archive_Tar
PEAR Archive_Tar Deserialization of Untrusted Data Vulnerability
What it is
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.
What to do
Apply updates per vendor instructions.
Vendor notices and references
- pear.php.net/bugs/bug.php?id=27002, https://www.drupal.org/sa-core-2020-013, https://acces
- nvd.nist.gov/vuln/detail/CVE-2020-28949
Description and required action as published by CISA. Full record at NVD.