Overview
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.
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
Key Details
| Property | Value |
|---|---|
| CVE ID | CVE-2020-36193 |
| Vendor / Product | PEAR — Archive_Tar |
| NVD Published | 2021-01-18 |
| NVD Last Modified | 2025-11-07 |
| CVSS 3.1 Score | 7.5 |
| CVSS 3.1 Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
| Severity | HIGH |
| CWE | CWE-22 |
| CISA KEV Added | 2022-08-25 |
| CISA KEV Deadline | 2022-09-15 |
| Known Ransomware Use | No |
CVSS 3.1 Breakdown
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None
Required Action
CISA BOD 22-01 Deadline: 2022-09-15.
Apply updates per vendor instructions.
Timeline
| Date | Event |
|---|---|
| 2022-08-25 | Added to CISA Known Exploited Vulnerabilities catalog |
| 2022-09-15 | CISA BOD 22-01 remediation deadline |
References
| Resource | Type |
|---|---|
| NVD — CVE-2020-36193 | Vulnerability Database |
| CISA KEV Catalog Entry | US Government |