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https://github.com/fkie-cad/nvd-json-data-feeds.git
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57 lines
3.6 KiB
JSON
57 lines
3.6 KiB
JSON
{
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"id": "CVE-2024-42318",
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"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"published": "2024-08-17T09:15:11.700",
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"lastModified": "2024-11-21T09:33:52.177",
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"vulnStatus": "Awaiting Analysis",
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"cveTags": [],
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nlandlock: Don't lose track of restrictions on cred_transfer\n\nWhen a process' cred struct is replaced, this _almost_ always invokes\nthe cred_prepare LSM hook; but in one special case (when\nKEYCTL_SESSION_TO_PARENT updates the parent's credentials), the\ncred_transfer LSM hook is used instead. Landlock only implements the\ncred_prepare hook, not cred_transfer, so KEYCTL_SESSION_TO_PARENT causes\nall information on Landlock restrictions to be lost.\n\nThis basically means that a process with the ability to use the fork()\nand keyctl() syscalls can get rid of all Landlock restrictions on\nitself.\n\nFix it by adding a cred_transfer hook that does the same thing as the\nexisting cred_prepare hook. (Implemented by having hook_cred_prepare()\ncall hook_cred_transfer() so that the two functions are less likely to\naccidentally diverge in the future.)"
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},
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{
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"lang": "es",
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"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: landlock: no pierda de vista las restricciones en cred_transfer Cuando se reemplaza la estructura cred de un proceso, esto _almost_ always invoca el gancho LSM cred_prepare; pero en un caso especial (cuando KEYCTL_SESSION_TO_PARENT actualiza las credenciales de los padres), se utiliza el gancho LSM cred_transfer. Landlock solo implementa el gancho cred_prepare, no cred_transfer, por lo que KEYCTL_SESSION_TO_PARENT hace que se pierda toda la informaci\u00f3n sobre las restricciones de Landlock. B\u00e1sicamente, esto significa que un proceso con la capacidad de utilizar las llamadas al sistema fork() y keyctl() puede deshacerse de todas las restricciones de Landlock sobre s\u00ed mismo. Solucionelo agregando un gancho cred_transfer que haga lo mismo que el gancho cred_prepare existente. (Se implementa haciendo que hook_cred_prepare() llame a hook_cred_transfer() para que sea menos probable que las dos funciones diverjan accidentalmente en el futuro)."
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}
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],
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"metrics": {},
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"references": [
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{
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"url": "https://bugs.chromium.org/p/project-zero/issues/detail?id=2566",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/0d74fd54db0bd0c0c224bef0da8fc95ea9c9f36c",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/16896914bace82d7811c62f3b6d5320132384f49",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/39705a6c29f8a2b93cf5b99528a55366c50014d1",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/916c648323fa53b89eedb34a0988ddaf01406117",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://git.kernel.org/stable/c/b14cc2cf313bd29056fadbc8ecd7f957cf5791ff",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://lore.kernel.org/all/20240817.shahka3Ee1iy@digikod.net/",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "https://www.openwall.com/lists/oss-security/2024/08/17/2",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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},
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{
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"url": "http://www.openwall.com/lists/oss-security/2024/08/17/2",
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"source": "af854a3a-2127-422b-91ae-364da2661108"
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}
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]
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} |