Known exploited vulnerability
CVE-2020-28949
The short answer
CVE-2020-28949 affects n/a n/a and is rated high (CVSS 7.8). CISA added it to the Known Exploited Vulnerabilities catalog on 2022-08-25: attackers are using it, so patch it first. Fixed versions are published for pear/archive_tar (1.4.11).
What it is
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.
Severity
7.8 high
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Exploited (CISA KEV)
Yes, since Aug 25, 2022
Federal due date Sep 15, 2022
EPSS, next 30 days
85%
Higher than 100% of scored CVEs
How it can be exploited
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
What CISA says to do
Apply updates per vendor instructions.
Affected packages and fixed versions
| Package | Ecosystem | Fixed in | Advisory |
|---|---|---|---|
| pear/archive_tar | Packagist | 1.4.11 | GHSA-75c5-f4gw-38r9 |
Is it in your code? Drop your lockfile into the free vulnerability check, or let vulnerability watch check your repository every day and open the upgrade as a pull request.
Affected products
n/a. NVD's record lists the exact affected versions.
References
- github.com/pear/Archive_Tar/issues/33 ExploitIssue TrackingVendor Advisory
- lists.debian.org/debian-lts-announce/2020/11/msg00045.html Mailing ListThird Party Advisory
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/42GPGVVFTLJYAKRI75IVB5R45NYQGEUR/ Mailing ListThird Party Advisory
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4V35LBRM6HBCXBVCITKQ4UEBTXO2EG7B/ Mailing ListThird Party Advisory
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5KSFM672XW3X6BR7TVKRD63SLZGKK437/ Mailing ListThird Party Advisory
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KWM4CTMEGAC4I2CHYNJVSROY4CVXVEUT/ Mailing ListThird Party Advisory
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NBYZSHYTIOBK6V7C4N7TP6KIKCRKLVWP/ Mailing ListThird Party Advisory
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VJQQYDAOWHD6RDITDRPHFW7WY6BS3V5N/ Mailing ListThird Party Advisory
- security.gentoo.org/glsa/202101-23 Third Party Advisory
- www.debian.org/security/2020/dsa-4817 Mailing ListThird Party Advisory
- www.drupal.org/sa-core-2020-013 Third Party Advisory
- github.com/pear/Archive_Tar/issues/33 ExploitIssue TrackingVendor Advisory
Questions
Is CVE-2020-28949 being exploited?
Yes. CISA added CVE-2020-28949 to its Known Exploited Vulnerabilities catalog on 2022-08-25, with a federal remediation due date of 2022-09-15.
How do I fix CVE-2020-28949?
Upgrade to a fixed version: pear/archive_tar (Packagist) 1.4.11. CISA's required action: Apply updates per vendor instructions.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.
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