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CVE-2020-36193

HIGH
7.5
CVSS Score
Published: January 18, 2021 at 07:24 PM UTC
Updated: June 17, 2026 at 03:14 AM UTC
4 products affected across 4 vendorsDebian LinuxFedoraDrupal

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Severity
HIGH7.5
Exploitation
CISA KEV
Exploit prediction
EPSS 71%
SSVC
Active

Actively Exploited

CISA Known Exploited Vulnerabilities (KEV) Catalog

EPSS Score70.6%

EPSS (Exploit Prediction Scoring System) estimates a 70.6% chance this CVE is exploited in the wild within the next 30 days — higher than 99% of all CVEs. It complements CVSS: a high EPSS on a mid-severity CVE can still be 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.

Required Action
Apply updates per vendor instructions.
Ransomware Use
Unknown
Added to KEV
Aug 25, 2022
Remediation Due
Sep 15, 2022
1508 days overdue
Notes
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

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Debian Linux· Debiandrupal
95%
10.09.0
Drupal· Drupaldrupal
95%
7.0 ≤ v < 7.788.9.0 ≤ v < 8.9.139.0.0 ≤ v < 9.0.119.1.0 ≤ v < 9.1.3
Affected range stops below 7.78, so it looks safe — our inference, not a vendor statement
Affected range stops below 8.9.13, so it looks safe — our inference, not a vendor statement
Affected range stops below 9.0.11, so it looks safe — our inference, not a vendor statement
Affected range stops below 9.1.3, so it looks safe — our inference, not a vendor statement
Fedora· Fedora Projectrpm
95%
32333435
Archive Tar· PHPdrupal
95%
v ≤ 1.4.11

References (11)

x_refsource_MISCPatch
Source: [email protected]
https://github.com/pear/Archive_Tar/commit/cde460582ff389404b5b3ccb59374e9b389de916
Mailing Listx_refsource_MLISTThird Party Advisory
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2021/01/msg00018.html
Mailing Listx_refsource_MLISTThird Party Advisory
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2021/04/msg00007.html
Vendor Advisoryx_refsource_FEDORABroken Link
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/42GPGVVFTLJYAKRI75IVB5R45NYQGEUR/
Vendor Advisoryx_refsource_FEDORABroken Link
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FOZNK4FIIV7FSFCJNNFWMJZTTV7NFJV2/
Vendor Advisoryx_refsource_FEDORABroken Link
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VJQQYDAOWHD6RDITDRPHFW7WY6BS3V5N/
Vendor Advisoryx_refsource_FEDORABroken Link
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YKD5WEFA4WT6AVTMRAYBNXZNLWZHM7FH/
Vendor Advisoryx_refsource_GENTOOThird Party Advisory
Source: [email protected]
https://security.gentoo.org/glsa/202101-23

SSVC — Action Prioritization

SSVCActiveAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-22CWE-59

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