{ "data_version": "4.0", "data_type": "CVE", "data_format": "MITRE", "CVE_data_meta": { "ID": "CVE-2024-47742", "ASSIGNER": "cve@kernel.org", "STATE": "PUBLIC" }, "description": { "description_data": [ { "lang": "eng", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfirmware_loader: Block path traversal\n\nMost firmware names are hardcoded strings, or are constructed from fairly\nconstrained format strings where the dynamic parts are just some hex\nnumbers or such.\n\nHowever, there are a couple codepaths in the kernel where firmware file\nnames contain string components that are passed through from a device or\nsemi-privileged userspace; the ones I could find (not counting interfaces\nthat require root privileges) are:\n\n - lpfc_sli4_request_firmware_update() seems to construct the firmware\n filename from \"ModelName\", a string that was previously parsed out of\n some descriptor (\"Vital Product Data\") in lpfc_fill_vpd()\n - nfp_net_fw_find() seems to construct a firmware filename from a model\n name coming from nfp_hwinfo_lookup(pf->hwinfo, \"nffw.partno\"), which I\n think parses some descriptor that was read from the device.\n (But this case likely isn't exploitable because the format string looks\n like \"netronome/nic_%s\", and there shouldn't be any *folders* starting\n with \"netronome/nic_\". The previous case was different because there,\n the \"%s\" is *at the start* of the format string.)\n - module_flash_fw_schedule() is reachable from the\n ETHTOOL_MSG_MODULE_FW_FLASH_ACT netlink command, which is marked as\n GENL_UNS_ADMIN_PERM (meaning CAP_NET_ADMIN inside a user namespace is\n enough to pass the privilege check), and takes a userspace-provided\n firmware name.\n (But I think to reach this case, you need to have CAP_NET_ADMIN over a\n network namespace that a special kind of ethernet device is mapped into,\n so I think this is not a viable attack path in practice.)\n\nFix it by rejecting any firmware names containing \"..\" path components.\n\nFor what it's worth, I went looking and haven't found any USB device\ndrivers that use the firmware loader dangerously." } ] }, "problemtype": { "problemtype_data": [ { "description": [ { "lang": "eng", "value": "n/a" } ] } ] }, "affects": { "vendor": { "vendor_data": [ { "vendor_name": "Linux", "product": { "product_data": [ { "product_name": "Linux", "version": { "version_data": [ { "version_affected": "<", "version_name": "abb139e75c2c", "version_value": "d1768e5535d3" }, { "version_value": "not down converted", "x_cve_json_5_version_data": { "versions": [ { "version": "3.7", "status": "affected" }, { "version": "0", "lessThan": "3.7", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.323", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.285", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.227", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.168", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.113", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.54", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.10.13", "lessThanOrEqual": "6.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.11.2", "lessThanOrEqual": "6.11.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ], "defaultStatus": "affected" } } ] } } ] } } ] } }, "references": { "reference_data": [ { "url": "https://git.kernel.org/stable/c/d1768e5535d3ded59f888637016e6f821f4e069f", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/d1768e5535d3ded59f888637016e6f821f4e069f" }, { "url": "https://git.kernel.org/stable/c/9b1ca33ebd05b3acef5b976c04e5e791af93ce1b", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/9b1ca33ebd05b3acef5b976c04e5e791af93ce1b" }, { "url": "https://git.kernel.org/stable/c/c30558e6c5c9ad6c86459d9acce1520ceeab9ea6", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/c30558e6c5c9ad6c86459d9acce1520ceeab9ea6" }, { "url": "https://git.kernel.org/stable/c/a77fc4acfd49fc6076e565445b2bc5fdc3244da4", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/a77fc4acfd49fc6076e565445b2bc5fdc3244da4" }, { "url": "https://git.kernel.org/stable/c/3d2411f4edcb649eaf232160db459bb4770b5251", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/3d2411f4edcb649eaf232160db459bb4770b5251" }, { "url": "https://git.kernel.org/stable/c/7420c1bf7fc784e587b87329cc6dfa3dca537aa4", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/7420c1bf7fc784e587b87329cc6dfa3dca537aa4" }, { "url": "https://git.kernel.org/stable/c/28f1cd94d3f1092728fb775a0fe26c5f1ac2ebeb", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/28f1cd94d3f1092728fb775a0fe26c5f1ac2ebeb" }, { "url": "https://git.kernel.org/stable/c/6c4e13fdfcab34811c3143a0a03c05fec4e870ec", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/6c4e13fdfcab34811c3143a0a03c05fec4e870ec" }, { "url": "https://git.kernel.org/stable/c/f0e5311aa8022107d63c54e2f03684ec097d1394", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/f0e5311aa8022107d63c54e2f03684ec097d1394" } ] }, "generator": { "engine": "bippy-8e903de6a542" } }