cve-2024-46740
Vulnerability from cvelistv5
Published
2024-09-18 07:12
Modified
2024-12-19 09:22
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: binder: fix UAF caused by offsets overwrite Binder objects are processed and copied individually into the target buffer during transactions. Any raw data in-between these objects is copied as well. However, this raw data copy lacks an out-of-bounds check. If the raw data exceeds the data section size then the copy overwrites the offsets section. This eventually triggers an error that attempts to unwind the processed objects. However, at this point the offsets used to index these objects are now corrupted. Unwinding with corrupted offsets can result in decrements of arbitrary nodes and lead to their premature release. Other users of such nodes are left with a dangling pointer triggering a use-after-free. This issue is made evident by the following KASAN report (trimmed): ================================================================== BUG: KASAN: slab-use-after-free in _raw_spin_lock+0xe4/0x19c Write of size 4 at addr ffff47fc91598f04 by task binder-util/743 CPU: 9 UID: 0 PID: 743 Comm: binder-util Not tainted 6.11.0-rc4 #1 Hardware name: linux,dummy-virt (DT) Call trace: _raw_spin_lock+0xe4/0x19c binder_free_buf+0x128/0x434 binder_thread_write+0x8a4/0x3260 binder_ioctl+0x18f0/0x258c [...] Allocated by task 743: __kmalloc_cache_noprof+0x110/0x270 binder_new_node+0x50/0x700 binder_transaction+0x413c/0x6da8 binder_thread_write+0x978/0x3260 binder_ioctl+0x18f0/0x258c [...] Freed by task 745: kfree+0xbc/0x208 binder_thread_read+0x1c5c/0x37d4 binder_ioctl+0x16d8/0x258c [...] ================================================================== To avoid this issue, let's check that the raw data copy is within the boundaries of the data section.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/109e845c1184c9f786d41516348ba3efd9112792Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1f33d9f1d9ac3f0129f8508925000900c2fe5bb0Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3a8154bb4ab4a01390a3abf1e6afac296e037da4Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4df153652cc46545722879415937582028c18af5Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4f79e0b80dc69bd5eaaed70f0df1b558728b4e59Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5a32bfd23022ffa7e152f273fa3fa29befb7d929Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/eef79854a04feac5b861f94d7b19cbbe79874117Patch
Impacted products
Vendor Product Version
Linux Linux Version: 5.17
Show details on NVD website

To clipboard 

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                "id": "CVE-2024-46740",
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbinder: fix UAF caused by offsets overwrite\n\nBinder objects are processed and copied individually into the target\nbuffer during transactions. Any raw data in-between these objects is\ncopied as well. However, this raw data copy lacks an out-of-bounds\ncheck. If the raw data exceeds the data section size then the copy\noverwrites the offsets section. This eventually triggers an error that\nattempts to unwind the processed objects. However, at this point the\noffsets used to index these objects are now corrupted.\n\nUnwinding with corrupted offsets can result in decrements of arbitrary\nnodes and lead to their premature release. Other users of such nodes are\nleft with a dangling pointer triggering a use-after-free. This issue is\nmade evident by the following KASAN report (trimmed):\n\n  ==================================================================\n  BUG: KASAN: slab-use-after-free in _raw_spin_lock+0xe4/0x19c\n  Write of size 4 at addr ffff47fc91598f04 by task binder-util/743\n\n  CPU: 9 UID: 0 PID: 743 Comm: binder-util Not tainted 6.11.0-rc4 #1\n  Hardware name: linux,dummy-virt (DT)\n  Call trace:\n   _raw_spin_lock+0xe4/0x19c\n   binder_free_buf+0x128/0x434\n   binder_thread_write+0x8a4/0x3260\n   binder_ioctl+0x18f0/0x258c\n  [...]\n\n  Allocated by task 743:\n   __kmalloc_cache_noprof+0x110/0x270\n   binder_new_node+0x50/0x700\n   binder_transaction+0x413c/0x6da8\n   binder_thread_write+0x978/0x3260\n   binder_ioctl+0x18f0/0x258c\n  [...]\n\n  Freed by task 745:\n   kfree+0xbc/0x208\n   binder_thread_read+0x1c5c/0x37d4\n   binder_ioctl+0x16d8/0x258c\n  [...]\n  ==================================================================\n\nTo avoid this issue, let\u0027s check that the raw data copy is within the\nboundaries of the data section."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-12-19T09:22:10.998Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2024-46740",
    "datePublished": "2024-09-18T07:12:01.653Z",
    "dateReserved": "2024-09-11T15:12:18.263Z",
    "dateUpdated": "2024-12-19T09:22:10.998Z",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2024-46740\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-09-18T08:15:03.377\",\"lastModified\":\"2024-09-20T18:34:08.163\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nbinder: fix UAF caused by offsets overwrite\\n\\nBinder objects are processed and copied individually into the target\\nbuffer during transactions. Any raw data in-between these objects is\\ncopied as well. However, this raw data copy lacks an out-of-bounds\\ncheck. If the raw data exceeds the data section size then the copy\\noverwrites the offsets section. This eventually triggers an error that\\nattempts to unwind the processed objects. However, at this point the\\noffsets used to index these objects are now corrupted.\\n\\nUnwinding with corrupted offsets can result in decrements of arbitrary\\nnodes and lead to their premature release. Other users of such nodes are\\nleft with a dangling pointer triggering a use-after-free. This issue is\\nmade evident by the following KASAN report (trimmed):\\n\\n  ==================================================================\\n  BUG: KASAN: slab-use-after-free in _raw_spin_lock+0xe4/0x19c\\n  Write of size 4 at addr ffff47fc91598f04 by task binder-util/743\\n\\n  CPU: 9 UID: 0 PID: 743 Comm: binder-util Not tainted 6.11.0-rc4 #1\\n  Hardware name: linux,dummy-virt (DT)\\n  Call trace:\\n   _raw_spin_lock+0xe4/0x19c\\n   binder_free_buf+0x128/0x434\\n   binder_thread_write+0x8a4/0x3260\\n   binder_ioctl+0x18f0/0x258c\\n  [...]\\n\\n  Allocated by task 743:\\n   __kmalloc_cache_noprof+0x110/0x270\\n   binder_new_node+0x50/0x700\\n   binder_transaction+0x413c/0x6da8\\n   binder_thread_write+0x978/0x3260\\n   binder_ioctl+0x18f0/0x258c\\n  [...]\\n\\n  Freed by task 745:\\n   kfree+0xbc/0x208\\n   binder_thread_read+0x1c5c/0x37d4\\n   binder_ioctl+0x16d8/0x258c\\n  [...]\\n  ==================================================================\\n\\nTo avoid this issue, let\u0027s check that the raw data copy is within the\\nboundaries of the data section.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: binder: fix UAF caused by offsets overwrite Los objetos Binder se procesan y copian individualmente en el b\u00fafer de destino durante las transacciones. Tambi\u00e9n se copian todos los datos sin procesar entre estos objetos. Sin embargo, esta copia de datos sin procesar carece de una comprobaci\u00f3n de fuera de los l\u00edmites. Si los datos sin procesar superan el tama\u00f1o de la secci\u00f3n de datos, la copia sobrescribe la secci\u00f3n de compensaciones. Esto finalmente desencadena un error que intenta desenrollar los objetos procesados. Sin embargo, en este punto, las compensaciones utilizadas para indexar estos objetos ahora est\u00e1n da\u00f1adas. El desenrollado con compensaciones da\u00f1adas puede resultar en disminuciones de nodos arbitrarios y conducir a su liberaci\u00f3n prematura. Otros usuarios de dichos nodos se quedan con un puntero colgante que activa un use after free. Este problema se hace evidente en el siguiente informe de KASAN (recortado): ===================================================================== ERROR: KASAN: slab-use-after-free en _raw_spin_lock+0xe4/0x19c Escritura de tama\u00f1o 4 en la direcci\u00f3n ffff47fc91598f04 por la tarea binder-util/743 CPU: 9 UID: 0 PID: 743 Comm: binder-util No contaminado 6.11.0-rc4 #1 Nombre del hardware: linux,dummy-virt (DT) Rastreo de llamadas: _raw_spin_lock+0xe4/0x19c binder_free_buf+0x128/0x434 binder_thread_write+0x8a4/0x3260 binder_ioctl+0x18f0/0x258c [...] Asignado por la tarea 743: __kmalloc_cache_noprof+0x110/0x270 binder_new_node+0x50/0x700 binder_transaction+0x413c/0x6da8 binder_thread_write+0x978/0x3260 binder_ioctl+0x18f0/0x258c [...] Liberado por la tarea 745: kfree+0xbc/0x208 binder_thread_read+0x1c5c/0x37d4 binder_ioctl+0x16d8/0x258c [...] ======================================================================= Para evitar este problema, verifiquemos que la copia de datos sin procesar est\u00e9 dentro de los l\u00edmites de la secci\u00f3n de datos.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.4.226\",\"versionEndExcluding\":\"5.4.284\",\"matchCriteriaId\":\"F0B6E199-279F-4F92-B463-C5F87E230BCE\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.10.157\",\"versionEndExcluding\":\"5.10.226\",\"matchCriteriaId\":\"D93C7D07-3360-4012-AFCB-4F16A83F0753\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.15.17\",\"versionEndExcluding\":\"5.15.167\",\"matchCriteriaId\":\"DC1E2D56-0897-4435-BC25-739B04462E13\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.17\",\"versionEndExcluding\":\"6.1.110\",\"matchCriteriaId\":\"BBF34251-254C-4A5B-A072-3C3A93781706\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.51\",\"matchCriteriaId\":\"E4529134-BAC4-4776-840B-304009E181A0\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.10.10\",\"matchCriteriaId\":\"ACDEE48C-137A-4731-90D0-A675865E1BED\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.11:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"8B3CE743-2126-47A3-8B7C-822B502CF119\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.11:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"4DEB27E7-30AA-45CC-8934-B89263EF3551\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.11:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"E0005AEF-856E-47EB-BFE4-90C46899394D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.11:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"39889A68-6D34-47A6-82FC-CD0BF23D6754\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.11:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"B8383ABF-1457-401F-9B61-EE50F4C61F4F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.11:rc6:*:*:*:*:*:*\",\"matchCriteriaId\":\"B77A9280-37E6-49AD-B559-5B23A3B1DC3D\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/109e845c1184c9f786d41516348ba3efd9112792\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/1f33d9f1d9ac3f0129f8508925000900c2fe5bb0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/3a8154bb4ab4a01390a3abf1e6afac296e037da4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/4df153652cc46545722879415937582028c18af5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/4f79e0b80dc69bd5eaaed70f0df1b558728b4e59\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/5a32bfd23022ffa7e152f273fa3fa29befb7d929\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/eef79854a04feac5b861f94d7b19cbbe79874117\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
  }
}


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