Bug 1595584 (CVE-2018-12895) - CVE-2018-12895 wordpress: Author users can execute arbitrary code by leveraging directory traversal on the wp-admin/post.php thumb parameter
Summary: CVE-2018-12895 wordpress: Author users can execute arbitrary code by leveragi...
Alias: CVE-2018-12895
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On: 1595586 1595585
TreeView+ depends on / blocked
Reported: 2018-06-27 07:55 UTC by Andrej Nemec
Modified: 2019-09-29 14:42 UTC (History)
2 users (show)

Fixed In Version:
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Clone Of:
Last Closed: 2019-06-10 10:30:39 UTC

Attachments (Terms of Use)

Description Andrej Nemec 2018-06-27 07:55:53 UTC
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.



Comment 1 Andrej Nemec 2018-06-27 07:56:20 UTC
Created wordpress tracking bugs for this issue:

Affects: epel-all [bug 1595586]
Affects: fedora-all [bug 1595585]

Comment 2 Product Security DevOps Team 2019-06-10 10:30:39 UTC
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.

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