CVE-2024-47742

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

firmware_loader: Block path traversal

Most firmware names are hardcoded strings, or are constructed from fairly

constrained format strings where the dynamic parts are just some hex

numbers or such.

However, there are a couple codepaths in the kernel where firmware file

names contain string components that are passed through from a device or

semi-privileged userspace; the ones I could find (not counting interfaces

that require root privileges) are:

- lpfc_sli4_request_firmware_update() seems to construct the firmware

filename from "ModelName", a string that was previously parsed out of

some descriptor ("Vital Product Data") in lpfc_fill_vpd()

- nfp_net_fw_find() seems to construct a firmware filename from a model

name coming from nfp_hwinfo_lookup(pf->hwinfo, "nffw.partno"), which I

think parses some descriptor that was read from the device.

(But this case likely isn't exploitable because the format

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. 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.

/// References