CVEs / CVE-2020-36193
CVE-2020-36193: PEAR Archive_Tar Improper Link Resolution Vulnerability
- Known exploited in the CISA KEV catalog since 25 Aug 2022
- high 7.5 CVSS 3.1 (NVD)
- EPSS 70.5% chance of exploitation in the next 30 days, higher than 99% of CVEs (30 Oct 2026)
- Last changed at its sources
Are you affected? Check your servers with Stackurity: it lists the software on each server and the vulnerabilities to fix first.
Check your servers with Stackurity Already using Stackurity? Search for CVE-2020-36193
Summary
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.
Description
Tar.php in Archive_Tar through 1.4.11 allows write operations with Directory Traversal due to inadequate checking of symbolic links, a related issue to CVE-2020-28948.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| n/a n/a | n/a | — |
| Product | Affected | Fixed in |
|---|---|---|
| pear/archive_tar (Packagist) | before 1.4.13 | 1.4.13 |
Package versions from GHSA-rpw6-9xfx-jvcx.
Exploitation
| In CISA KEV since | 25 Aug 2022 |
|---|---|
| Due date for US federal agencies | 15 Sep 2022 |
| Used in ransomware campaigns | Unknown |
| Required action | Apply updates per vendor instructions. |
Severity
| CVSS 3.1 | 7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:NScored by NVD |
|---|---|
| Weakness | CWE-22, CWE-59 |
References
- CVE-2020-36193 on NVD
- CVE-2020-36193 in the CISA KEV catalog
- https://github.com/pear/Archive_Tar/commit/cde460582ff389404b5b3ccb59374e9b389de916 (cited by CISA)
- https://www.drupal.org/sa-core-2021-001 (cited by CISA)
- https://access.redhat.com/security/cve/cve-2020-36193 (cited by CISA)
- CVE-2020-36193 on OSV
- https://github.com/pear/Archive_Tar/commit/cde460582ff389404b5b3ccb59374e9b389de916 Patch
- https://lists.debian.org/debian-lts-announce/2021/01/msg00018.html Mailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/04/msg00007.html Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/42GPGVVFTLJYAKRI75IVB5R45NYQGEUR/ Broken Link
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FOZNK4FIIV7FSFCJNNFWMJZTTV7NFJV2/ Broken Link
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VJQQYDAOWHD6RDITDRPHFW7WY6BS3V5N/ Broken Link
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YKD5WEFA4WT6AVTMRAYBNXZNLWZHM7FH/ Broken Link
- https://security.gentoo.org/glsa/202101-23 Third Party Advisory
- https://www.debian.org/security/2021/dsa-4894 Third Party Advisory
- https://www.drupal.org/sa-core-2021-001 Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-36193 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.