CVE-2020-28949

HIGH7.8

CISA KEV

Published 2020-11-19 · Updated 2026-06-17 · Source cve@mitre.org

Summary

CVE-2020-28949 is a high-severity (CVSS 7.8) vulnerability in PEAR Archive_Tar. CISA added it to the Known Exploited Vulnerabilities catalog on August 25, 2022, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by September 15, 2022. CISA does not currently list it as used in ransomware campaigns. PEAR has 2 vulnerabilities in the KEV catalog, 0 of them linked to ransomware.

All 2 known-exploited PEAR vulnerabilities →

Description

Archive_Tar through 1.4.10 has :// filename sanitization only to address phar attacks, and thus any other stream-wrapper attack (such as file:// to overwrite files) can still succeed.

CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CISA Known-Exploited Vulnerability

Product: PEAR — Archive_Tar

Name: PEAR Archive_Tar Deserialization of Untrusted Data Vulnerability

Date added: 2022-08-25 · Due: 2022-09-15

Required action: Apply updates per vendor instructions.

References

View on NVD

More exploited PEAR vulnerabilities

Most recently added to CISA KEV

CVE-2020-36193
Archive_Tar — PEAR Archive_Tar Improper Link Resolution Vulnerability
added 2022-08-25

View all →

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