CVE-2020-28949VulnerabilityPublished 08/25/2022Updated 10/24/2026
CVE-2020-28949: PEAR Archive_Tar Deserialization of Untrusted Data Vulnerability
Affects PEAR Archive_TarSource CISA KEV
Severity
HighNo CVSS score published yet
- Exploitation
Actively exploited – in CISA KEV since 08/25/2022
- KEV deadline
- 09/15/2022
- EPSS
- 84.6% chance of exploitation in 30 days – higher than 99% of CVEs
What to do
CISA required action
Apply updates per vendor instructions.
Description
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.
Weaknesses
References
- pear.php.net/bugs/bug.php?id=27002, (opens in a new tab)
- drupal.org/sa-core-2020-013, (opens in a new tab)
- access.redhat.com/security/cve/cve-2020-28949 (opens in a new tab)
- nvd.nist.gov/vuln/detail/CVE-2020-28949 (opens in a new tab)
- cisa.gov/known-exploited-vulnerabilities-catalog?search=CVE-2020-28949 (opens in a new tab)