CVE-2023-5369 copy_file_range insufficient capability rights check

High 7.1 Published 4 Oct 2023 Updated 13 Feb 2025

Sandboxed processes can bypass seek restrictions to read or write arbitrary file locations via the copy_file_range system call.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2023-5369?

CVE-2023-5369 is a high-severity vulnerability in Freebsd Freebsd, published on 4 Oct 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Before correction, the copy_file_range system call checked only for the CAP_READ and CAP_WRITE capabilities on the input and output file descriptors, respectively. Using an offset is logically equivalent to seeking, and the system call must additionally require the CAP_SEEK capability.

This incorrect privilege check enabled sandboxed processes with only read or write but no seek capability on a file descriptor to read data from or write data to an arbitrary location within the file corresponding to that file descriptor.

Weakness: CWE-273

Which versions are affected by CVE-2023-5369?

It affects 1 product.

Products include Freebsd Freebsd.

How do I fix CVE-2023-5369?

No fix has been published for CVE-2023-5369 yet. Limit exposure of the affected software until one is available.

Is CVE-2023-5369 being exploited?

There is no known exploitation of CVE-2023-5369 in the wild and no public exploit code.

All Freebsd Freebsd vulnerabilities

Sources

Also known as GHSA-4hwj-mwvm-vc26.