ghsa-wrw9-rpg8-p3wx
Vulnerability from github
Published
2024-12-27 15:31
Modified
2025-01-16 18:30
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Details

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

bpf: fix OOB devmap writes when deleting elements

Jordy reported issue against XSKMAP which also applies to DEVMAP - the index used for accessing map entry, due to being a signed integer, causes the OOB writes. Fix is simple as changing the type from int to u32, however, when compared to XSKMAP case, one more thing needs to be addressed.

When map is released from system via dev_map_free(), we iterate through all of the entries and an iterator variable is also an int, which implies OOB accesses. Again, change it to be u32.

Example splat below:

[ 160.724676] BUG: unable to handle page fault for address: ffffc8fc2c001000 [ 160.731662] #PF: supervisor read access in kernel mode [ 160.736876] #PF: error_code(0x0000) - not-present page [ 160.742095] PGD 0 P4D 0 [ 160.744678] Oops: Oops: 0000 [#1] PREEMPT SMP [ 160.749106] CPU: 1 UID: 0 PID: 520 Comm: kworker/u145:12 Not tainted 6.12.0-rc1+ #487 [ 160.757050] Hardware name: Intel Corporation S2600WFT/S2600WFT, BIOS SE5C620.86B.02.01.0008.031920191559 03/19/2019 [ 160.767642] Workqueue: events_unbound bpf_map_free_deferred [ 160.773308] RIP: 0010:dev_map_free+0x77/0x170 [ 160.777735] Code: 00 e8 fd 91 ed ff e8 b8 73 ed ff 41 83 7d 18 19 74 6e 41 8b 45 24 49 8b bd f8 00 00 00 31 db 85 c0 74 48 48 63 c3 48 8d 04 c7 <48> 8b 28 48 85 ed 74 30 48 8b 7d 18 48 85 ff 74 05 e8 b3 52 fa ff [ 160.796777] RSP: 0018:ffffc9000ee1fe38 EFLAGS: 00010202 [ 160.802086] RAX: ffffc8fc2c001000 RBX: 0000000080000000 RCX: 0000000000000024 [ 160.809331] RDX: 0000000000000000 RSI: 0000000000000024 RDI: ffffc9002c001000 [ 160.816576] RBP: 0000000000000000 R08: 0000000000000023 R09: 0000000000000001 [ 160.823823] R10: 0000000000000001 R11: 00000000000ee6b2 R12: dead000000000122 [ 160.831066] R13: ffff88810c928e00 R14: ffff8881002df405 R15: 0000000000000000 [ 160.838310] FS: 0000000000000000(0000) GS:ffff8897e0c40000(0000) knlGS:0000000000000000 [ 160.846528] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 160.852357] CR2: ffffc8fc2c001000 CR3: 0000000005c32006 CR4: 00000000007726f0 [ 160.859604] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 160.866847] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 160.874092] PKRU: 55555554 [ 160.876847] Call Trace: [ 160.879338] [ 160.881477] ? __die+0x20/0x60 [ 160.884586] ? page_fault_oops+0x15a/0x450 [ 160.888746] ? search_extable+0x22/0x30 [ 160.892647] ? search_bpf_extables+0x5f/0x80 [ 160.896988] ? exc_page_fault+0xa9/0x140 [ 160.900973] ? asm_exc_page_fault+0x22/0x30 [ 160.905232] ? dev_map_free+0x77/0x170 [ 160.909043] ? dev_map_free+0x58/0x170 [ 160.912857] bpf_map_free_deferred+0x51/0x90 [ 160.917196] process_one_work+0x142/0x370 [ 160.921272] worker_thread+0x29e/0x3b0 [ 160.925082] ? rescuer_thread+0x4b0/0x4b0 [ 160.929157] kthread+0xd4/0x110 [ 160.932355] ? kthread_park+0x80/0x80 [ 160.936079] ret_from_fork+0x2d/0x50 [ 160.943396] ? kthread_park+0x80/0x80 [ 160.950803] ret_from_fork_asm+0x11/0x20 [ 160.958482]

Show details on source website

To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2024-56615"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-787"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-12-27T15:15:21Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: fix OOB devmap writes when deleting elements\n\nJordy reported issue against XSKMAP which also applies to DEVMAP - the\nindex used for accessing map entry, due to being a signed integer,\ncauses the OOB writes. Fix is simple as changing the type from int to\nu32, however, when compared to XSKMAP case, one more thing needs to be\naddressed.\n\nWhen map is released from system via dev_map_free(), we iterate through\nall of the entries and an iterator variable is also an int, which\nimplies OOB accesses. Again, change it to be u32.\n\nExample splat below:\n\n[  160.724676] BUG: unable to handle page fault for address: ffffc8fc2c001000\n[  160.731662] #PF: supervisor read access in kernel mode\n[  160.736876] #PF: error_code(0x0000) - not-present page\n[  160.742095] PGD 0 P4D 0\n[  160.744678] Oops: Oops: 0000 [#1] PREEMPT SMP\n[  160.749106] CPU: 1 UID: 0 PID: 520 Comm: kworker/u145:12 Not tainted 6.12.0-rc1+ #487\n[  160.757050] Hardware name: Intel Corporation S2600WFT/S2600WFT, BIOS SE5C620.86B.02.01.0008.031920191559 03/19/2019\n[  160.767642] Workqueue: events_unbound bpf_map_free_deferred\n[  160.773308] RIP: 0010:dev_map_free+0x77/0x170\n[  160.777735] Code: 00 e8 fd 91 ed ff e8 b8 73 ed ff 41 83 7d 18 19 74 6e 41 8b 45 24 49 8b bd f8 00 00 00 31 db 85 c0 74 48 48 63 c3 48 8d 04 c7 \u003c48\u003e 8b 28 48 85 ed 74 30 48 8b 7d 18 48 85 ff 74 05 e8 b3 52 fa ff\n[  160.796777] RSP: 0018:ffffc9000ee1fe38 EFLAGS: 00010202\n[  160.802086] RAX: ffffc8fc2c001000 RBX: 0000000080000000 RCX: 0000000000000024\n[  160.809331] RDX: 0000000000000000 RSI: 0000000000000024 RDI: ffffc9002c001000\n[  160.816576] RBP: 0000000000000000 R08: 0000000000000023 R09: 0000000000000001\n[  160.823823] R10: 0000000000000001 R11: 00000000000ee6b2 R12: dead000000000122\n[  160.831066] R13: ffff88810c928e00 R14: ffff8881002df405 R15: 0000000000000000\n[  160.838310] FS:  0000000000000000(0000) GS:ffff8897e0c40000(0000) knlGS:0000000000000000\n[  160.846528] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[  160.852357] CR2: ffffc8fc2c001000 CR3: 0000000005c32006 CR4: 00000000007726f0\n[  160.859604] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n[  160.866847] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n[  160.874092] PKRU: 55555554\n[  160.876847] Call Trace:\n[  160.879338]  \u003cTASK\u003e\n[  160.881477]  ? __die+0x20/0x60\n[  160.884586]  ? page_fault_oops+0x15a/0x450\n[  160.888746]  ? search_extable+0x22/0x30\n[  160.892647]  ? search_bpf_extables+0x5f/0x80\n[  160.896988]  ? exc_page_fault+0xa9/0x140\n[  160.900973]  ? asm_exc_page_fault+0x22/0x30\n[  160.905232]  ? dev_map_free+0x77/0x170\n[  160.909043]  ? dev_map_free+0x58/0x170\n[  160.912857]  bpf_map_free_deferred+0x51/0x90\n[  160.917196]  process_one_work+0x142/0x370\n[  160.921272]  worker_thread+0x29e/0x3b0\n[  160.925082]  ? rescuer_thread+0x4b0/0x4b0\n[  160.929157]  kthread+0xd4/0x110\n[  160.932355]  ? kthread_park+0x80/0x80\n[  160.936079]  ret_from_fork+0x2d/0x50\n[  160.943396]  ? kthread_park+0x80/0x80\n[  160.950803]  ret_from_fork_asm+0x11/0x20\n[  160.958482]  \u003c/TASK\u003e",
  "id": "GHSA-wrw9-rpg8-p3wx",
  "modified": "2025-01-16T18:30:58Z",
  "published": "2024-12-27T15:31:55Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-56615"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0f170e91d3063ca60baec4bd9f544faf3bfe29eb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/178e31df1fb3d9e0890eb471da16709cbc82edee"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/70f3de869865f9c3da0508a5ea29f6f4c1889057"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8e858930695d3ebec423e85384c95427258c294f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/98c03d05936d846073df8f550e9e8bf0dde1d77f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ab244dd7cf4c291f82faacdc50b45cc0f55b674d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ad34306ac6836e5dd096b7d0ad4aa20cb7c8d9e5"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.