cve-2024-42109
Vulnerability from cvelistv5
Published
2024-07-30 07:46
Modified
2024-11-05 09:37
Severity ?
Summary
netfilter: nf_tables: unconditionally flush pending work before notifier
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/09e650c3a3a7d804430260510534ccbf71c75b2ePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3325628cb36b7f216c5716e7b5124d9dc81199e4Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4c06c13317b9a08decedcd7aaf706691e336277cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/55a40406aac555defe9bdd0adec9508116ce7cb1Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9f6958ba2e902f9820c594869bd710ba74b7c4c0Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/09e650c3a3a7d804430260510534ccbf71c75b2ePatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/3325628cb36b7f216c5716e7b5124d9dc81199e4Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/4c06c13317b9a08decedcd7aaf706691e336277cPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/55a40406aac555defe9bdd0adec9508116ce7cb1Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/9f6958ba2e902f9820c594869bd710ba74b7c4c0Patch
Impacted products
Vendor Product Version
Linux Linux Version: 6.5
Show details on NVD website

To clipboard 

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    "nvd": "{\"cve\":{\"id\":\"CVE-2024-42109\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-07-30T08:15:03.407\",\"lastModified\":\"2024-11-21T09:33:37.223\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnetfilter: nf_tables: unconditionally flush pending work before notifier\\n\\nsyzbot reports:\\n\\nKASAN: slab-uaf in nft_ctx_update include/net/netfilter/nf_tables.h:1831\\nKASAN: slab-uaf in nft_commit_release net/netfilter/nf_tables_api.c:9530\\nKASAN: slab-uaf int nf_tables_trans_destroy_work+0x152b/0x1750 net/netfilter/nf_tables_api.c:9597\\nRead of size 2 at addr ffff88802b0051c4 by task kworker/1:1/45\\n[..]\\nWorkqueue: events nf_tables_trans_destroy_work\\nCall Trace:\\n nft_ctx_update include/net/netfilter/nf_tables.h:1831 [inline]\\n nft_commit_release net/netfilter/nf_tables_api.c:9530 [inline]\\n nf_tables_trans_destroy_work+0x152b/0x1750 net/netfilter/nf_tables_api.c:9597\\n\\nProblem is that the notifier does a conditional flush, but its possible\\nthat the table-to-be-removed is still referenced by transactions being\\nprocessed by the worker, so we need to flush unconditionally.\\n\\nWe could make the flush_work depend on whether we found a table to delete\\nin nf-next to avoid the flush for most cases.\\n\\nAFAICS this problem is only exposed in nf-next, with\\ncommit e169285f8c56 (\\\"netfilter: nf_tables: do not store nft_ctx in transaction objects\\\"),\\nwith this commit applied there is an unconditional fetch of\\ntable-\u003efamily which is whats triggering the above splat.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: netfilter: nf_tables: vaciar incondicionalmente el trabajo pendiente antes de que el notificador syzbot informe: KASAN: slab-uaf en nft_ctx_update include/net/netfilter/nf_tables.h:1831 KASAN: slab-uaf en nft_commit_release net/netfilter/nf_tables_api.c:9530 KASAN: slab-uaf int nf_tables_trans_destroy_work+0x152b/0x1750 net/netfilter/nf_tables_api.c:9597 Lectura de tama\u00f1o 2 en la direcci\u00f3n ffff88802b0051c4 por tarea kworker/1:1/45 [..] ue : eventos nf_tables_trans_destroy_work Seguimiento de llamadas: nft_ctx_update include/net/netfilter/nf_tables.h:1831 [en l\u00ednea] nft_commit_release net/netfilter/nf_tables_api.c:9530 [en l\u00ednea] nf_tables_trans_destroy_work+0x152b/0x1750 s_api.c:9597 El problema es que el notificador realiza un vaciado condicional, pero es posible que las transacciones que procesa el trabajador a\u00fan hagan referencia a la tabla que se va a eliminar, por lo que debemos realizar un vaciado incondicional. Podr\u00edamos hacer que flux_work dependa de si encontramos una tabla para eliminar en nf-next para evitar el vaciado en la mayor\u00eda de los casos. AFAICS, este problema solo se expone en nf-next, con la confirmaci\u00f3n e169285f8c56 (\\\"netfilter: nf_tables: no almacenar nft_ctx en objetos de transacci\u00f3n\\\"), con esta confirmaci\u00f3n aplicada hay una b\u00fasqueda incondicional de tabla-\u0026gt;familia que es lo que desencadena lo anterior salpicar.\"}],\"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\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.15.129\",\"versionEndExcluding\":\"5.15.163\",\"matchCriteriaId\":\"5FD25434-47C3-45B8-B46A-6352379CD2F9\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.1.50\",\"versionEndExcluding\":\"6.1.98\",\"matchCriteriaId\":\"24E84470-CB41-4B10-ACC2-6579459F3A48\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.5\",\"versionEndExcluding\":\"6.6.39\",\"matchCriteriaId\":\"E079242F-1B25-40DA-BCE2-2A7965C9168E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.9.9\",\"matchCriteriaId\":\"ADCC1407-0CB3-4C8F-B4C5-07F682CD7085\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/09e650c3a3a7d804430260510534ccbf71c75b2e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/3325628cb36b7f216c5716e7b5124d9dc81199e4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/4c06c13317b9a08decedcd7aaf706691e336277c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/55a40406aac555defe9bdd0adec9508116ce7cb1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/9f6958ba2e902f9820c594869bd710ba74b7c4c0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/09e650c3a3a7d804430260510534ccbf71c75b2e\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/3325628cb36b7f216c5716e7b5124d9dc81199e4\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/4c06c13317b9a08decedcd7aaf706691e336277c\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/55a40406aac555defe9bdd0adec9508116ce7cb1\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/9f6958ba2e902f9820c594869bd710ba74b7c4c0\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]}]}}"
  }
}


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