fkie_cve-2024-44987
Vulnerability from fkie_nvd
Published
2024-09-04 20:15
Modified
2024-09-05 17:53
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: ipv6: prevent UAF in ip6_send_skb() syzbot reported an UAF in ip6_send_skb() [1] After ip6_local_out() has returned, we no longer can safely dereference rt, unless we hold rcu_read_lock(). A similar issue has been fixed in commit a688caa34beb ("ipv6: take rcu lock in rawv6_send_hdrinc()") Another potential issue in ip6_finish_output2() is handled in a separate patch. [1] BUG: KASAN: slab-use-after-free in ip6_send_skb+0x18d/0x230 net/ipv6/ip6_output.c:1964 Read of size 8 at addr ffff88806dde4858 by task syz.1.380/6530 CPU: 1 UID: 0 PID: 6530 Comm: syz.1.380 Not tainted 6.11.0-rc3-syzkaller-00306-gdf6cbc62cc9b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Call Trace: <TASK> __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 ip6_send_skb+0x18d/0x230 net/ipv6/ip6_output.c:1964 rawv6_push_pending_frames+0x75c/0x9e0 net/ipv6/raw.c:588 rawv6_sendmsg+0x19c7/0x23c0 net/ipv6/raw.c:926 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x1a6/0x270 net/socket.c:745 sock_write_iter+0x2dd/0x400 net/socket.c:1160 do_iter_readv_writev+0x60a/0x890 vfs_writev+0x37c/0xbb0 fs/read_write.c:971 do_writev+0x1b1/0x350 fs/read_write.c:1018 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f936bf79e79 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f936cd7f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 RAX: ffffffffffffffda RBX: 00007f936c115f80 RCX: 00007f936bf79e79 RDX: 0000000000000001 RSI: 0000000020000040 RDI: 0000000000000004 RBP: 00007f936bfe7916 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f936c115f80 R15: 00007fff2860a7a8 </TASK> Allocated by task 6530: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:312 [inline] __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3988 [inline] slab_alloc_node mm/slub.c:4037 [inline] kmem_cache_alloc_noprof+0x135/0x2a0 mm/slub.c:4044 dst_alloc+0x12b/0x190 net/core/dst.c:89 ip6_blackhole_route+0x59/0x340 net/ipv6/route.c:2670 make_blackhole net/xfrm/xfrm_policy.c:3120 [inline] xfrm_lookup_route+0xd1/0x1c0 net/xfrm/xfrm_policy.c:3313 ip6_dst_lookup_flow+0x13e/0x180 net/ipv6/ip6_output.c:1257 rawv6_sendmsg+0x1283/0x23c0 net/ipv6/raw.c:898 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x1a6/0x270 net/socket.c:745 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2597 ___sys_sendmsg net/socket.c:2651 [inline] __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2680 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 45: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579 poison_slab_object+0xe0/0x150 mm/kasan/common.c:240 __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2252 [inline] slab_free mm/slub.c:4473 [inline] kmem_cache_free+0x145/0x350 mm/slub.c:4548 dst_destroy+0x2ac/0x460 net/core/dst.c:124 rcu_do_batch kernel/rcu/tree.c:2569 [inline] rcu_core+0xafd/0x1830 kernel/rcu/tree. ---truncated---
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/24e93695b1239fbe4c31e224372be77f82dab69aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/571567e0277008459750f0728f246086b2659429Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9a3e55afa95ed4ac9eda112d4f918af645d72f25Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/af1dde074ee2ed7dd5bdca4e7e8ba17f44e7b011Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cb5880a0de12c7f618d2bdd84e2d985f1e06ed7ePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ce2f6cfab2c637d0bd9762104023a15d0ab7c0a8Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e44bd76dd072756e674f45c5be00153f4ded68b2Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/faa389b2fbaaec7fd27a390b4896139f9da662e3Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.11
linux linux_kernel 6.11
linux linux_kernel 6.11
linux linux_kernel 6.11


To clipboard 

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: prevent UAF in ip6_send_skb()\n\nsyzbot reported an UAF in ip6_send_skb() [1]\n\nAfter ip6_local_out() has returned, we no longer can safely\ndereference rt, unless we hold rcu_read_lock().\n\nA similar issue has been fixed in commit\na688caa34beb (\"ipv6: take rcu lock in rawv6_send_hdrinc()\")\n\nAnother potential issue in ip6_finish_output2() is handled in a\nseparate patch.\n\n[1]\n BUG: KASAN: slab-use-after-free in ip6_send_skb+0x18d/0x230 net/ipv6/ip6_output.c:1964\nRead of size 8 at addr ffff88806dde4858 by task syz.1.380/6530\n\nCPU: 1 UID: 0 PID: 6530 Comm: syz.1.380 Not tainted 6.11.0-rc3-syzkaller-00306-gdf6cbc62cc9b #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024\nCall Trace:\n \u003cTASK\u003e\n  __dump_stack lib/dump_stack.c:93 [inline]\n  dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119\n  print_address_description mm/kasan/report.c:377 [inline]\n  print_report+0x169/0x550 mm/kasan/report.c:488\n  kasan_report+0x143/0x180 mm/kasan/report.c:601\n  ip6_send_skb+0x18d/0x230 net/ipv6/ip6_output.c:1964\n  rawv6_push_pending_frames+0x75c/0x9e0 net/ipv6/raw.c:588\n  rawv6_sendmsg+0x19c7/0x23c0 net/ipv6/raw.c:926\n  sock_sendmsg_nosec net/socket.c:730 [inline]\n  __sock_sendmsg+0x1a6/0x270 net/socket.c:745\n  sock_write_iter+0x2dd/0x400 net/socket.c:1160\n do_iter_readv_writev+0x60a/0x890\n  vfs_writev+0x37c/0xbb0 fs/read_write.c:971\n  do_writev+0x1b1/0x350 fs/read_write.c:1018\n  do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n  do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\nRIP: 0033:0x7f936bf79e79\nCode: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u003c48\u003e 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48\nRSP: 002b:00007f936cd7f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000014\nRAX: ffffffffffffffda RBX: 00007f936c115f80 RCX: 00007f936bf79e79\nRDX: 0000000000000001 RSI: 0000000020000040 RDI: 0000000000000004\nRBP: 00007f936bfe7916 R08: 0000000000000000 R09: 0000000000000000\nR10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000\nR13: 0000000000000000 R14: 00007f936c115f80 R15: 00007fff2860a7a8\n \u003c/TASK\u003e\n\nAllocated by task 6530:\n  kasan_save_stack mm/kasan/common.c:47 [inline]\n  kasan_save_track+0x3f/0x80 mm/kasan/common.c:68\n  unpoison_slab_object mm/kasan/common.c:312 [inline]\n  __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338\n  kasan_slab_alloc include/linux/kasan.h:201 [inline]\n  slab_post_alloc_hook mm/slub.c:3988 [inline]\n  slab_alloc_node mm/slub.c:4037 [inline]\n  kmem_cache_alloc_noprof+0x135/0x2a0 mm/slub.c:4044\n  dst_alloc+0x12b/0x190 net/core/dst.c:89\n  ip6_blackhole_route+0x59/0x340 net/ipv6/route.c:2670\n  make_blackhole net/xfrm/xfrm_policy.c:3120 [inline]\n  xfrm_lookup_route+0xd1/0x1c0 net/xfrm/xfrm_policy.c:3313\n  ip6_dst_lookup_flow+0x13e/0x180 net/ipv6/ip6_output.c:1257\n  rawv6_sendmsg+0x1283/0x23c0 net/ipv6/raw.c:898\n  sock_sendmsg_nosec net/socket.c:730 [inline]\n  __sock_sendmsg+0x1a6/0x270 net/socket.c:745\n  ____sys_sendmsg+0x525/0x7d0 net/socket.c:2597\n  ___sys_sendmsg net/socket.c:2651 [inline]\n  __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2680\n  do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n  do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nFreed by task 45:\n  kasan_save_stack mm/kasan/common.c:47 [inline]\n  kasan_save_track+0x3f/0x80 mm/kasan/common.c:68\n  kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579\n  poison_slab_object+0xe0/0x150 mm/kasan/common.c:240\n  __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256\n  kasan_slab_free include/linux/kasan.h:184 [inline]\n  slab_free_hook mm/slub.c:2252 [inline]\n  slab_free mm/slub.c:4473 [inline]\n  kmem_cache_free+0x145/0x350 mm/slub.c:4548\n  dst_destroy+0x2ac/0x460 net/core/dst.c:124\n  rcu_do_batch kernel/rcu/tree.c:2569 [inline]\n  rcu_core+0xafd/0x1830 kernel/rcu/tree.\n---truncated---"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ipv6: evitar UAF en ip6_send_skb() syzbot inform\u00f3 de un UAF en ip6_send_skb() [1] Despu\u00e9s de que ip6_local_out() haya regresado, ya no podemos desreferenciar rt de forma segura, a menos que mantengamos rcu_read_lock(). Se ha solucionado un problema similar en el commit a688caa34beb (\"ipv6: tomar bloqueo rcu en rawv6_send_hdrinc()\") Otro problema potencial en ip6_finish_output2() se maneja en un parche independiente. [1] ERROR: KASAN: slab-use-after-free en ip6_send_skb+0x18d/0x230 net/ipv6/ip6_output.c:1964 Lectura de tama\u00f1o 8 en la direcci\u00f3n ffff88806dde4858 por la tarea syz.1.380/6530 CPU: 1 UID: 0 PID: 6530 Comm: syz.1.380 No contaminado 6.11.0-rc3-syzkaller-00306-gdf6cbc62cc9b #0 Nombre del hardware: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Seguimiento de llamadas:  __dump_stack lib/dump_stack.c:93 [en l\u00ednea] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119 descripci\u00f3n_direcci\u00f3n_impresi\u00f3n mm/kasan/report.c:377 [en l\u00ednea] informe_impresi\u00f3n+0x169/0x550 mm/kasan/report.c:488 informe_kasan+0x143/0x180 mm/kasan/report.c:601 ip6_send_skb+0x18d/0x230 net/ipv6/ip6_output.c:1964 tramas_pendientes_de_env\u00edo_sin_formato_v6+0x75c/0x9e0 net/ipv6/raw.c:588 env\u00edo_sin_formato_v6+0x19c7/0x23c0 net/ipv6/raw.c:926 env\u00edo_sin_formato_v6_nosec net/socket.c:730 [en l\u00ednea] __sock_sendmsg+0x1a6/0x270 net/socket.c:745 sock_write_iter+0x2dd/0x400 net/socket.c:1160 do_iter_readv_writev+0x60a/0x890 vfs_writev+0x37c/0xbb0 fs/read_write.c:971 do_writev+0x1b1/0x350 fs/read_write.c:1018 do_syscall_x64 arch/x86/entry/common.c:52 [en l\u00ednea] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f DESCANSE EN P\u00c9RDIDA: 0033:0x7f936bf79e79 C\u00f3digo: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u0026lt;48\u0026gt; 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f936cd7f038 EFLAGS: 00000246 ORIG_RAX: 00000000000000014 RAX: ffffffffffffffda RBX: 00007f936c115f80 RCX: 00007f936bf79e79 RDX: 0000000000000001 RSI: 0000000020000040 RDI: 0000000000000004 RBP: 00007f936bfe7916 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 00000000000000246 R12: 00000000000000000 R13: 0000000000000000 R14: 00007f936c115f80 R15: 00007fff2860a7a8  Asignado por la tarea 6530: kasan_save_stack mm/kasan/common.c:47 [en l\u00ednea] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:312 [en l\u00ednea] __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338 kasan_slab_alloc include/linux/kasan.h:201 [en l\u00ednea] slab_post_alloc_hook mm/slub.c:3988 [en l\u00ednea] slab_alloc_node mm/slub.c:4037 [en l\u00ednea] kmem_cache_alloc_noprof+0x135/0x2a0 mm/slub.c:4044 dst_alloc+0x12b/0x190 net/core/dst.c:89 ip6_blackhole_route+0x59/0x340 net/ipv6/route.c:2670 make_blackhole net/xfrm/xfrm_policy.c:3120 [en l\u00ednea] xfrm_lookup_route+0xd1/0x1c0 net/xfrm/xfrm_policy.c:3313 ip6_dst_lookup_flow+0x13e/0x180 net/ipv6/ip6_output.c:1257 rawv6_sendmsg+0x1283/0x23c0 net/ipv6/raw.c:898 sock_sendmsg_nosec net/socket.c:730 [en l\u00ednea] __sock_sendmsg+0x1a6/0x270 net/socket.c:745 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2597 ___sys_sendmsg net/socket.c:2651 [en l\u00ednea] __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2680 do_syscall_x64 arch/x86/entry/common.c:52 [en l\u00ednea] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Liberado por la tarea 45: kasan_save_stack mm/kasan/common.c:47 [en l\u00ednea] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579 poison_slab_object+0xe0/0x150 mm/kasan/common.c:240 __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [en l\u00ednea] slab_free_hook mm/slub.c:2252 ---truncado---"
    }
  ],
  "id": "CVE-2024-44987",
  "lastModified": "2024-09-05T17:53:54.687",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2024-09-04T20:15:07.890",
  "references": [
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      "tags": [
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      "url": "https://git.kernel.org/stable/c/571567e0277008459750f0728f246086b2659429"
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    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/af1dde074ee2ed7dd5bdca4e7e8ba17f44e7b011"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/cb5880a0de12c7f618d2bdd84e2d985f1e06ed7e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/ce2f6cfab2c637d0bd9762104023a15d0ab7c0a8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/e44bd76dd072756e674f45c5be00153f4ded68b2"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/faa389b2fbaaec7fd27a390b4896139f9da662e3"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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