CVE-2020-36193
Actively exploited. CVE-2020-36193 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-08-25) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.
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.
CSIRTS triage
- What
- The vulnerability allows for directory traversal during write operations due to inadequate symbolic link checks.
- Who is affected
- Users of PEAR Archive_Tar, particularly in third-party products like Drupal Core and Red Hat Linux, are affected.
- Urgency
- Immediate remediation is necessary as exploitation is possible and the severity is critical.
- Action
- Update to the latest version of PEAR Archive_Tar.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 99% of all EPSS-scored CVEs.
Advisory coverage (1)
- criticalexploitedCVE-2020-36193: PEAR Archive_Tar Improper Link Resolution Vulnerabilitycisa-kev · 2022-08-25
External references
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[](https://www.csirts.com/cve/CVE-2020-36193)