# CVE-2020-28949: PEAR Archive_Tar Deserialization of Untrusted Data Vulnerability

> CVE-2020-28949: PEAR Archive_Tar Deserialization of Untrusted Data Vulnerability. CVSS 7.8 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2020-28949
Last updated: 2025-10-21T23:35:32Z

- Published: 2020-11-19 18:14 UTC · Updated: 2025-10-21 23:35 UTC · Assigner: mitre
- CVSS: 7.8 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS: 84.6%, 100th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2022-08-25, federal due date 2022-09-15, ransomware use: Unknown

## 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.

## CISA required action

Apply updates per vendor instructions.

## Affected vendors and products

- PEAR: Archive\_Tar

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2020-28949)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2020-28949)
- [http://packetstormsecurity.com/files/161095/PEAR-Archive\_Tar-Arbitrary-File-Write.html](http://packetstormsecurity.com/files/161095/PEAR-Archive_Tar-Arbitrary-File-Write.html)
- [https://github.com/pear/Archive\_Tar/issues/33](https://github.com/pear/Archive_Tar/issues/33)
- [https://lists.debian.org/debian-lts-announce/2020/11/msg00045.html](https://lists.debian.org/debian-lts-announce/2020/11/msg00045.html)
- [https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/42GPGVVFTLJYAKRI75IVB5R45NYQGEUR/](https://lists.fedoraproject.org/archives/list/package-announce%2540lists.fedoraproject.org/message/42GPGVVFTLJYAKRI75IVB5R45NYQGEUR/)
- [https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4V35LBRM6HBCXBVCITKQ4UEBTXO2EG7B/](https://lists.fedoraproject.org/archives/list/package-announce%2540lists.fedoraproject.org/message/4V35LBRM6HBCXBVCITKQ4UEBTXO2EG7B/)
- [https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5KSFM672XW3X6BR7TVKRD63SLZGKK437/](https://lists.fedoraproject.org/archives/list/package-announce%2540lists.fedoraproject.org/message/5KSFM672XW3X6BR7TVKRD63SLZGKK437/)
- [https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KWM4CTMEGAC4I2CHYNJVSROY4CVXVEUT/](https://lists.fedoraproject.org/archives/list/package-announce%2540lists.fedoraproject.org/message/KWM4CTMEGAC4I2CHYNJVSROY4CVXVEUT/)
- [https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NBYZSHYTIOBK6V7C4N7TP6KIKCRKLVWP/](https://lists.fedoraproject.org/archives/list/package-announce%2540lists.fedoraproject.org/message/NBYZSHYTIOBK6V7C4N7TP6KIKCRKLVWP/)
- [https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VJQQYDAOWHD6RDITDRPHFW7WY6BS3V5N/](https://lists.fedoraproject.org/archives/list/package-announce%2540lists.fedoraproject.org/message/VJQQYDAOWHD6RDITDRPHFW7WY6BS3V5N/)
- [https://security.gentoo.org/glsa/202101-23](https://security.gentoo.org/glsa/202101-23)
- [https://www.debian.org/security/2020/dsa-4817](https://www.debian.org/security/2020/dsa-4817)
- [https://www.drupal.org/sa-core-2020-013](https://www.drupal.org/sa-core-2020-013)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2020-28949 · Markdown: https://rewindex.com/cve/CVE-2020-28949.md · JSON: https://rewindex.com/api/v1/cves/CVE-2020-28949 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:10:24.936Z