mirror of
https://github.com/CVEProject/cvelist.git
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102 lines
5.7 KiB
JSON
102 lines
5.7 KiB
JSON
{
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"data_version": "4.0",
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"data_type": "CVE",
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"data_format": "MITRE",
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"CVE_data_meta": {
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"ID": "CVE-2024-50217",
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"ASSIGNER": "cve@kernel.org",
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"STATE": "PUBLIC"
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},
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"description": {
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"description_data": [
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{
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"lang": "eng",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix use-after-free of block device file in __btrfs_free_extra_devids()\n\nMounting btrfs from two images (which have the same one fsid and two\ndifferent dev_uuids) in certain executing order may trigger an UAF for\nvariable 'device->bdev_file' in __btrfs_free_extra_devids(). And\nfollowing are the details:\n\n1. Attach image_1 to loop0, attach image_2 to loop1, and scan btrfs\n devices by ioctl(BTRFS_IOC_SCAN_DEV):\n\n / btrfs_device_1 \u2192 loop0\n fs_device\n \\ btrfs_device_2 \u2192 loop1\n2. mount /dev/loop0 /mnt\n btrfs_open_devices\n btrfs_device_1->bdev_file = btrfs_get_bdev_and_sb(loop0)\n btrfs_device_2->bdev_file = btrfs_get_bdev_and_sb(loop1)\n btrfs_fill_super\n open_ctree\n fail: btrfs_close_devices // -ENOMEM\n\t btrfs_close_bdev(btrfs_device_1)\n fput(btrfs_device_1->bdev_file)\n\t // btrfs_device_1->bdev_file is freed\n\t btrfs_close_bdev(btrfs_device_2)\n fput(btrfs_device_2->bdev_file)\n\n3. mount /dev/loop1 /mnt\n btrfs_open_devices\n btrfs_get_bdev_and_sb(&bdev_file)\n // EIO, btrfs_device_1->bdev_file is not assigned,\n // which points to a freed memory area\n btrfs_device_2->bdev_file = btrfs_get_bdev_and_sb(loop1)\n btrfs_fill_super\n open_ctree\n btrfs_free_extra_devids\n if (btrfs_device_1->bdev_file)\n fput(btrfs_device_1->bdev_file) // UAF !\n\nFix it by setting 'device->bdev_file' as 'NULL' after closing the\nbtrfs_device in btrfs_close_one_device()."
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}
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]
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},
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"problemtype": {
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"problemtype_data": [
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{
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"description": [
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{
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"lang": "eng",
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"value": "n/a"
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}
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]
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}
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]
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},
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"affects": {
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"vendor": {
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"vendor_data": [
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{
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"vendor_name": "Linux",
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"product": {
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"product_data": [
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{
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"product_name": "Linux",
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"version": {
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"version_data": [
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{
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"version_affected": "<",
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"version_name": "142388194191",
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"version_value": "47a83f8df395"
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},
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{
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"version_value": "not down converted",
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"x_cve_json_5_version_data": {
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"versions": [
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{
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"version": "4.8",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "4.8",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.11.7",
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"lessThanOrEqual": "6.11.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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],
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"defaultStatus": "affected"
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}
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}
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]
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}
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}
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]
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}
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}
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]
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}
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},
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"references": {
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"reference_data": [
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{
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"url": "https://git.kernel.org/stable/c/47a83f8df39545f3f552bb6a1b6d9c30e37621dd",
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"refsource": "MISC",
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"name": "https://git.kernel.org/stable/c/47a83f8df39545f3f552bb6a1b6d9c30e37621dd"
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},
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{
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"url": "https://git.kernel.org/stable/c/aec8e6bf839101784f3ef037dcdb9432c3f32343",
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"refsource": "MISC",
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"name": "https://git.kernel.org/stable/c/aec8e6bf839101784f3ef037dcdb9432c3f32343"
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}
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]
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},
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"generator": {
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"engine": "bippy-8e903de6a542"
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}
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} |