CVE-2018-13405
7.8 · HIGHOverview
CVE-2018-13405 is a high-severity vulnerability affecting linux linux_kernel. It was published on July 6, 2018 and has a CVSS 3.1 base score of 7.8 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| linux | linux_kernel | 0 | Affected |
| f5 | big-ip_access_policy_manager | >= 13.0.0, < 13.1.3.5 | Affected |
| f5 | big-ip_advanced_firewall_manager | >= 13.0.0, < 13.1.3.5 | Affected |
| f5 | big-ip_analytics | >= 13.0.0, < 13.1.3.5 | Affected |
| f5 | big-ip_application_acceleration_manager | >= 13.0.0, < 13.1.3.5 | Affected |
| f5 | big-ip_application_security_manager | >= 13.0.0, < 13.1.3.5 | Affected |
| f5 | big-ip_domain_name_system | >= 13.0.0, < 13.1.3.5 | Affected |
References
Frequently Asked Questions
What is CVE-2018-13405?
CVE-2018-13405 is a high-severity vulnerability affecting linux linux_kernel. It was published on July 6, 2018 and has a CVSS 3.1 base score of 7.8 (HIGH).
How severe is CVE-2018-13405?
This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2018-13405?
Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2018-13405?
CyberStrike's AI-powered security agents can automatically detect CVE-2018-13405 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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