368 lines
20 KiB
JSON
368 lines
20 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"cveMetadata": {
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"cveId": "CVE-2023-52599",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2024-03-02T21:55:42.573Z",
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"datePublished": "2024-03-06T06:45:27.655Z",
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"dateUpdated": "2026-08-05T09:10:33.534Z"
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},
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"containers": {
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"cna": {
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\njfs: fix array-index-out-of-bounds in diNewExt\n\n[Syz report]\nUBSAN: array-index-out-of-bounds in fs/jfs/jfs_imap.c:2360:2\nindex -878706688 is out of range for type 'struct iagctl[128]'\nCPU: 1 PID: 5065 Comm: syz-executor282 Not tainted 6.7.0-rc4-syzkaller-00009-gbee0e7762ad2 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023\nCall Trace:\n <TASK>\n __dump_stack lib/dump_stack.c:88 [inline]\n dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106\n ubsan_epilogue lib/ubsan.c:217 [inline]\n __ubsan_handle_out_of_bounds+0x11c/0x150 lib/ubsan.c:348\n diNewExt+0x3cf3/0x4000 fs/jfs/jfs_imap.c:2360\n diAllocExt fs/jfs/jfs_imap.c:1949 [inline]\n diAllocAG+0xbe8/0x1e50 fs/jfs/jfs_imap.c:1666\n diAlloc+0x1d3/0x1760 fs/jfs/jfs_imap.c:1587\n ialloc+0x8f/0x900 fs/jfs/jfs_inode.c:56\n jfs_mkdir+0x1c5/0xb90 fs/jfs/namei.c:225\n vfs_mkdir+0x2f1/0x4b0 fs/namei.c:4106\n do_mkdirat+0x264/0x3a0 fs/namei.c:4129\n __do_sys_mkdir fs/namei.c:4149 [inline]\n __se_sys_mkdir fs/namei.c:4147 [inline]\n __x64_sys_mkdir+0x6e/0x80 fs/namei.c:4147\n do_syscall_x64 arch/x86/entry/common.c:51 [inline]\n do_syscall_64+0x45/0x110 arch/x86/entry/common.c:82\n entry_SYSCALL_64_after_hwframe+0x63/0x6b\nRIP: 0033:0x7fcb7e6a0b57\nCode: ff ff 77 07 31 c0 c3 0f 1f 40 00 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48\nRSP: 002b:00007ffd83023038 EFLAGS: 00000286 ORIG_RAX: 0000000000000053\nRAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 00007fcb7e6a0b57\nRDX: 00000000000a1020 RSI: 00000000000001ff RDI: 0000000020000140\nRBP: 0000000020000140 R08: 0000000000000000 R09: 0000000000000000\nR10: 0000000000000000 R11: 0000000000000286 R12: 00007ffd830230d0\nR13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000\n\n[Analysis]\nWhen the agstart is too large, it can cause agno overflow.\n\n[Fix]\nAfter obtaining agno, if the value is invalid, exit the subsequent process.\n\n\nModified the test from agno > MAXAG to agno >= MAXAG based on linux-next\nreport by kernel test robot (Dan Carpenter)."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - The bug is reached only after a local mount of a crafted JFS block image, then ordinary local syscalls (mkdir → jfs_mkdir → ialloc → diAlloc → diAllocAG → diAllocExt → diNewExt); fs/jfs has no network or adjacent-protocol entry point.\nAC:L - agstart is taken verbatim from attacker-controlled on-disk IAG metadata, so BLKTOAG produces a deterministic out-of-range agno (syzbot index -878706688) with no race or attacker-uncontrollable state required.\nPR:L - As with sibling JFS crafted-image CVEs, an unprivileged desktop/kiosk session user can attach the malicious image via udisks2/polkit/automount and then trigger diNewExt with ordinary mkdir; JFS lacks FS_USERNS_MOUNT but the realistic low-privilege mount helpers still apply.\nUI:N - The attacker supplies the image, causes it to be mounted in their own session (including via automount/udisks), and drives mkdir themselves; no separate victim action is required at exploitation time.\nS:U - Out-of-bounds indexing of in-kernel im_agctl[] corrupts host kernel memory only and does not cross a VM, IOMMU, or other separate security authority.\nC:H - Invalid agno causes out-of-bounds reads of im_agctl[].extfree/.inofree and related imap state; under memory-corruption guidance this is reasonably leveraged for arbitrary kernel memory disclosure.\nI:H - The same bad agno drives multiple out-of-bounds writes (im_agctl[agno].extfree/.inofree/.numfree/.numinos), yielding a controlled heap-corruption primitive suitable for control-flow hijacking.\nA:H - Syzbot reported UBSAN array-index-out-of-bounds in diNewExt, and the OOB reads/writes reliably produce kernel oops/panic or hard availability loss."
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}
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