cve-2024-36489
Vulnerability from cvelistv5
Published
2024-06-21 10:18
Modified
2024-11-05 09:27
Severity ?
Summary
tls: fix missing memory barrier in tls_init
Impacted products
Vendor Product Version
Linux Linux Version: 5.7
Show details on NVD website


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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntls: fix missing memory barrier in tls_init\n\nIn tls_init(), a write memory barrier is missing, and store-store\nreordering may cause NULL dereference in tls_{setsockopt,getsockopt}.\n\nCPU0                               CPU1\n-----                              -----\n// In tls_init()\n// In tls_ctx_create()\nctx = kzalloc()\nctx-\u003esk_proto = READ_ONCE(sk-\u003esk_prot) -(1)\n\n// In update_sk_prot()\nWRITE_ONCE(sk-\u003esk_prot, tls_prots)     -(2)\n\n                                   // In sock_common_setsockopt()\n                                   READ_ONCE(sk-\u003esk_prot)-\u003esetsockopt()\n\n                                   // In tls_{setsockopt,getsockopt}()\n                                   ctx-\u003esk_proto-\u003esetsockopt()    -(3)\n\nIn the above scenario, when (1) and (2) are reordered, (3) can observe\nthe NULL value of ctx-\u003esk_proto, causing NULL dereference.\n\nTo fix it, we rely on rcu_assign_pointer() which implies the release\nbarrier semantic. By moving rcu_assign_pointer() after ctx-\u003esk_proto is\ninitialized, we can ensure that ctx-\u003esk_proto are visible when\nchanging sk-\u003esk_prot."
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    "dateReserved": "2024-06-21T10:12:11.459Z",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2024-36489\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-06-21T11:15:10.513\",\"lastModified\":\"2024-11-21T09:22:16.667\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ntls: fix missing memory barrier in tls_init\\n\\nIn tls_init(), a write memory barrier is missing, and store-store\\nreordering may cause NULL dereference in tls_{setsockopt,getsockopt}.\\n\\nCPU0                               CPU1\\n-----                              -----\\n// In tls_init()\\n// In tls_ctx_create()\\nctx = kzalloc()\\nctx-\u003esk_proto = READ_ONCE(sk-\u003esk_prot) -(1)\\n\\n// In update_sk_prot()\\nWRITE_ONCE(sk-\u003esk_prot, tls_prots)     -(2)\\n\\n                                   // In sock_common_setsockopt()\\n                                   READ_ONCE(sk-\u003esk_prot)-\u003esetsockopt()\\n\\n                                   // In tls_{setsockopt,getsockopt}()\\n                                   ctx-\u003esk_proto-\u003esetsockopt()    -(3)\\n\\nIn the above scenario, when (1) and (2) are reordered, (3) can observe\\nthe NULL value of ctx-\u003esk_proto, causing NULL dereference.\\n\\nTo fix it, we rely on rcu_assign_pointer() which implies the release\\nbarrier semantic. By moving rcu_assign_pointer() after ctx-\u003esk_proto is\\ninitialized, we can ensure that ctx-\u003esk_proto are visible when\\nchanging sk-\u003esk_prot.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: tls: corrige la barrera de memoria faltante en tls_init En tls_init(), falta una barrera de memoria de escritura y el reordenamiento tienda-tienda puede causar una desreferencia NULL en tls_{setsockopt,getsockopt}. CPU0 CPU1 ----- ----- // En tls_init() // En tls_ctx_create() ctx = kzalloc() ctx-\u0026gt;sk_proto = READ_ONCE(sk-\u0026gt;sk_prot) -(1) // En update_sk_prot( ) WRITE_ONCE(sk-\u0026gt;sk_prot, tls_prots) -(2) // En sock_common_setsockopt() READ_ONCE(sk-\u0026gt;sk_prot)-\u0026gt;setsockopt() // En tls_{setsockopt,getsockopt}() ctx-\u0026gt;sk_proto-\u0026gt;setsockopt () -(3) En el escenario anterior, cuando (1) y (2) se reordenan, (3) puede observar el valor NULL de ctx-\u0026gt;sk_proto, lo que provoca la desreferencia NULL. Para solucionarlo, confiamos en rcu_assign_pointer() que implica la sem\u00e1ntica de barrera de liberaci\u00f3n. Al mover rcu_assign_pointer() despu\u00e9s de inicializar ctx-\u0026gt;sk_proto, podemos asegurarnos de que ctx-\u0026gt;sk_proto sean visibles al cambiar sk-\u0026gt;sk_prot.\"}],\"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:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.7\",\"versionEndExcluding\":\"5.10.219\",\"matchCriteriaId\":\"1EDE42D8-582E-4251-943B-96BC242F2876\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.161\",\"matchCriteriaId\":\"31130639-53FE-4726-8986-434EE2528CB2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.93\",\"matchCriteriaId\":\"EEFB78EE-F990-4197-BF1C-156760A55667\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.33\",\"matchCriteriaId\":\"FCE796DF-3B50-4DC6-BAE5-95271068FC9E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.9.4\",\"matchCriteriaId\":\"991B9791-966A-4D18-9E8D-A8AB128E5627\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/2c260a24cf1c4d30ea3646124f766ee46169280b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/335c8f1566d8e44c384d16b450a18554896d4e8b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/91e61dd7a0af660408e87372d8330ceb218be302\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ab67c2fd3d070a21914d0c31319d3858ab4e199c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d72e126e9a36d3d33889829df8fc90100bb0e071\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ef21007a7b581c7fe64d5a10c320880a033c837b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/2c260a24cf1c4d30ea3646124f766ee46169280b\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/335c8f1566d8e44c384d16b450a18554896d4e8b\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/91e61dd7a0af660408e87372d8330ceb218be302\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ab67c2fd3d070a21914d0c31319d3858ab4e199c\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d72e126e9a36d3d33889829df8fc90100bb0e071\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ef21007a7b581c7fe64d5a10c320880a033c837b\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]}]}}"
  }
}


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