CVE-2020-28949
HIGHCVSS 7.8/10Actively ExploitedEPSS 84.55%
Last modified
CVE-2020-28949 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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 has confirmed active exploitation in the wild. EPSS estimates a 84.55% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Exploitation Status
This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by .
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Php | Archive Tar | < 1.4.12 |
| Debian | Debian Linux | 9.0 |
| Debian | Debian Linux | 10.0 |
| Fedoraproject | Fedora | 32 |
| Fedoraproject | Fedora | 33 |
| Fedoraproject | Fedora | 34 |
| Fedoraproject | Fedora | 35 |
| Drupal | Drupal | >= 7.0, < 7.75 |
| Drupal | Drupal | >= 8.0.0, < 8.9.10 |
| Drupal | Drupal | >= 8.8.0, < 8.8.12 |
| Drupal | Drupal | >= 9.0.0, < 9.0.9 |
References
- http://packetstormsecurity.com/files/161095/PEAR-Archive_Tar-Arbitrary-File-Write.htmlExploit, Third Party Advisory, VDB Entry
- https://github.com/pear/Archive_Tar/issues/33Exploit, Issue Tracking, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2020/11/msg00045.htmlMailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/42GPGVVFTLJYAKRI75IVB5R45NYQGEUR/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4V35LBRM6HBCXBVCITKQ4UEBTXO2EG7B/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5KSFM672XW3X6BR7TVKRD63SLZGKK437/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KWM4CTMEGAC4I2CHYNJVSROY4CVXVEUT/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NBYZSHYTIOBK6V7C4N7TP6KIKCRKLVWP/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VJQQYDAOWHD6RDITDRPHFW7WY6BS3V5N/Mailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202101-23Third Party Advisory
- https://www.debian.org/security/2020/dsa-4817Mailing List, Third Party Advisory
- https://www.drupal.org/sa-core-2020-013Third Party Advisory
- http://packetstormsecurity.com/files/161095/PEAR-Archive_Tar-Arbitrary-File-Write.htmlExploit, Third Party Advisory, VDB Entry
- https://github.com/pear/Archive_Tar/issues/33Exploit, Issue Tracking, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2020/11/msg00045.htmlMailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/42GPGVVFTLJYAKRI75IVB5R45NYQGEUR/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4V35LBRM6HBCXBVCITKQ4UEBTXO2EG7B/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5KSFM672XW3X6BR7TVKRD63SLZGKK437/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KWM4CTMEGAC4I2CHYNJVSROY4CVXVEUT/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NBYZSHYTIOBK6V7C4N7TP6KIKCRKLVWP/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VJQQYDAOWHD6RDITDRPHFW7WY6BS3V5N/Mailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202101-23Third Party Advisory
- https://www.debian.org/security/2020/dsa-4817Mailing List, Third Party Advisory
- https://www.drupal.org/sa-core-2020-013Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-28949US Government Resource
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2020-28949?
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.
How severe is CVE-2020-28949?
CVE-2020-28949 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 84.55% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.
How do I fix CVE-2020-28949?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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