Directory Traversal Affecting wordpress package, versions <4.9.7+dfsg1-1
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Test your applications- Snyk ID SNYK-DEBIANUNSTABLE-WORDPRESS-363537
- published 26 Jun 2018
- disclosed 26 Jun 2018
Introduced: 26 Jun 2018
CVE-2018-12895 Open this link in a new tabHow to fix?
Upgrade Debian:unstable wordpress to version 4.9.7+dfsg1-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream wordpress package and not the wordpress package as distributed by Debian.
See How to fix? for Debian:unstable relevant fixed versions and status.
WordPress through 4.9.6 allows Author users to execute arbitrary code by leveraging directory traversal in the wp-admin/post.php thumb parameter, which is passed to the PHP unlink function and can delete the wp-config.php file. This is related to missing filename validation in the wp-includes/post.php wp_delete_attachment function. The attacker must have capabilities for files and posts that are normally available only to the Author, Editor, and Administrator roles. The attack methodology is to delete wp-config.php and then launch a new installation process to increase the attacker's privileges.
References
- https://security-tracker.debian.org/tracker/CVE-2018-12895
- https://www.debian.org/security/2018/dsa-4250
- https://lists.debian.org/debian-lts-announce/2018/07/msg00046.html
- https://blog.ripstech.com/2018/wordpress-file-delete-to-code-execution/
- https://wpvulndb.com/vulnerabilities/9100
- http://www.securityfocus.com/bid/104569
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2018-12895
- http://packetstormsecurity.com/files/164633/WordPress-4.9.6-Arbitrary-File-Deletion.html
- https://www.exploit-db.com/exploits/50456