What’s Vulnerable › Vulnerabilities

CVE-2018-13405

Description

The inode_init_owner function in fs/inode.c in the Linux kernel through 3.16 allows local users to create files with an unintended group ownership, in a scenario where a directory is SGID to a certain group and is writable by a user who is not a member of that group. Here, the non-member can trigger creation of a plain file whose group ownership is that group. The intended behavior was that the non-member can trigger creation of a directory (but not a plain file) whose group ownership is that group. The non-member can escalate privileges by making the plain file executable and SGID.

Affected products

How to fix

Upgrade to a fixed version: F5 BIG-IP APM 13.1.3.5, 14.1.3.1, 15.0.1.4; BIG-IP 13.1.3.5, 14.1.3.1, 15.0.1.4; F5 Big-Ip Analytics 13.1.3.5, 14.1.3.1, 15.0.1.4; F5 Networks, Inc. BIG-IP (AAM) 13.1.3.5, 14.1.3.1, 15.0.1.4; BIG-IP ASM 13.1.3.5, 14.1.3.1, 15.0.1.4; F5 BIG-IP DNS 13.1.3.5, 14.1.3.1, 15.0.1.4; F5 Big-Ip Edge Gateway 13.1.3.5, 14.1.3.1, 15.0.1.4; F5 Big-Ip Fraud Protection Service 13.1.3.5, 14.1.3.1, 15.0.1.4; F5 Big-Ip Global Traffic Manager 13.1.3.5, 14.1.3.1, 15.0.1.4; F5 Big-Ip Link Controller 13.1.3.5, 14.1.3.1, 15.0.1.4; F5 BIG-IP (LTM) 13.1.3.5, 14.1.3.1, 15.0.1.4; F5 Networks, Inc. BIG-IP (PEM) 13.1.3.5, 14.1.3.1, 15.0.1.4. Check the vendor advisory for mitigations.

References

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