CVE-2020-36193: PEAR Archive_Tar Improper Link Resolution Vulnerability
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.
| Vendor | PEAR |
|---|---|
| Product | Archive_Tar |
| Date added to KEV | 2022-08-25 |
| Due date (BOD 22-01) | 2022-09-15 |
| Known ransomware campaign use | Unknown |
| CWE | CWE-22, CWE-59 |
| Required action | Apply updates per vendor instructions. |
What to do
- Identify every instance of PEAR Archive_Tar in your environment (asset inventory, EDR, vulnerability scanner).
- Apply CISA's required action: Apply updates per vendor instructions.
- Federal civilian agencies must act by 2022-09-15 under BOD 22-01; other organizations can use the same date as a target.
- Check the vendor advisory and NVD entry linked below for affected versions, then record the fix in your change log.
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Sources
- NVD entry for CVE-2020-36193 (severity scores, if any, live there)
- CISA KEV catalog entry
- https://github.com/pear/Archive_Tar/commit/cde460582ff389404b5b3ccb59374e9b389de916
- https://www.drupal.org/sa-core-2021-001
- https://access.redhat.com/security/cve/cve-2020-36193
- https://nvd.nist.gov/vuln/detail/CVE-2020-36193