CVE-2024-36489

{"id": "CVE-2024-36489", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "published": "2024-06-21T11:15:10.513", "references": [{"url": "https://git.kernel.org/stable/c/2c260a24cf1c4d30ea3646124f766ee46169280b", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/335c8f1566d8e44c384d16b450a18554896d4e8b", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/91e61dd7a0af660408e87372d8330ceb218be302", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/ab67c2fd3d070a21914d0c31319d3858ab4e199c", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/d72e126e9a36d3d33889829df8fc90100bb0e071", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/ef21007a7b581c7fe64d5a10c320880a033c837b", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/2c260a24cf1c4d30ea3646124f766ee46169280b", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/335c8f1566d8e44c384d16b450a18554896d4e8b", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/91e61dd7a0af660408e87372d8330ceb218be302", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/ab67c2fd3d070a21914d0c31319d3858ab4e199c", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/d72e126e9a36d3d33889829df8fc90100bb0e071", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/ef21007a7b581c7fe64d5a10c320880a033c837b", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-476"}]}], "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->sk_proto = READ_ONCE(sk->sk_prot) -(1)\n\n// In update_sk_prot()\nWRITE_ONCE(sk->sk_prot, tls_prots) -(2)\n\n // In sock_common_setsockopt()\n READ_ONCE(sk->sk_prot)->setsockopt()\n\n // In tls_{setsockopt,getsockopt}()\n ctx->sk_proto->setsockopt() -(3)\n\nIn the above scenario, when (1) and (2) are reordered, (3) can observe\nthe NULL value of ctx->sk_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->sk_proto is\ninitialized, we can ensure that ctx->sk_proto are visible when\nchanging sk->sk_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->sk_proto = READ_ONCE(sk->sk_prot) -(1) // En update_sk_prot( ) WRITE_ONCE(sk->sk_prot, tls_prots) -(2) // En sock_common_setsockopt() READ_ONCE(sk->sk_prot)->setsockopt() // En tls_{setsockopt,getsockopt}() ctx->sk_proto->setsockopt () -(3) En el escenario anterior, cuando (1) y (2) se reordenan, (3) puede observar el valor NULL de ctx->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->sk_proto, podemos asegurarnos de que ctx->sk_proto sean visibles al cambiar sk->sk_prot."}], "lastModified": "2024-11-21T09:22:16.667", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1EDE42D8-582E-4251-943B-96BC242F2876", "versionEndExcluding": "5.10.219", "versionStartIncluding": "5.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "31130639-53FE-4726-8986-434EE2528CB2", "versionEndExcluding": "5.15.161", "versionStartIncluding": "5.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "EEFB78EE-F990-4197-BF1C-156760A55667", "versionEndExcluding": "6.1.93", "versionStartIncluding": "5.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "FCE796DF-3B50-4DC6-BAE5-95271068FC9E", "versionEndExcluding": "6.6.33", "versionStartIncluding": "6.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "991B9791-966A-4D18-9E8D-A8AB128E5627", "versionEndExcluding": "6.9.4", "versionStartIncluding": "6.7"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}