CVE-2024-46800
Vulnerability from cvelistv5
Published
2024-09-18 07:12
Modified
2024-12-19 09:23
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: sch/netem: fix use after free in netem_dequeue If netem_dequeue() enqueues packet to inner qdisc and that qdisc returns __NET_XMIT_STOLEN. The packet is dropped but qdisc_tree_reduce_backlog() is not called to update the parent's q.qlen, leading to the similar use-after-free as Commit e04991a48dbaf382 ("netem: fix return value if duplicate enqueue fails") Commands to trigger KASAN UaF: ip link add type dummy ip link set lo up ip link set dummy0 up tc qdisc add dev lo parent root handle 1: drr tc filter add dev lo parent 1: basic classid 1:1 tc class add dev lo classid 1:1 drr tc qdisc add dev lo parent 1:1 handle 2: netem tc qdisc add dev lo parent 2: handle 3: drr tc filter add dev lo parent 3: basic classid 3:1 action mirred egress redirect dev dummy0 tc class add dev lo classid 3:1 drr ping -c1 -W0.01 localhost # Trigger bug tc class del dev lo classid 1:1 tc class add dev lo classid 1:1 drr ping -c1 -W0.01 localhost # UaF
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/14f91ab8d391f249b845916820a56f42cf747241Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/295ad5afd9efc5f67b86c64fce28fb94e26dc4c9Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/32008ab989ddcff1a485fa2b4906234c25dc5cd6Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3b3a2a9c6349e25a025d2330f479bc33a6ccb54aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/98c75d76187944296068d685dfd8a1e9fd8c4fdcPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/db2c235682913a63054e741fe4e19645fdf2d68ePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/dde33a9d0b80aae0c69594d1f462515d7ff1cb3dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f0bddb4de043399f16d1969dad5ee5b984a64e7bPatch
Impacted products
Vendor Product Version
Linux Linux Version: 3.3
Show details on NVD website

To clipboard 

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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsch/netem: fix use after free in netem_dequeue\n\nIf netem_dequeue() enqueues packet to inner qdisc and that qdisc\nreturns __NET_XMIT_STOLEN. The packet is dropped but\nqdisc_tree_reduce_backlog() is not called to update the parent\u0027s\nq.qlen, leading to the similar use-after-free as Commit\ne04991a48dbaf382 (\"netem: fix return value if duplicate enqueue\nfails\")\n\nCommands to trigger KASAN UaF:\n\nip link add type dummy\nip link set lo up\nip link set dummy0 up\ntc qdisc add dev lo parent root handle 1: drr\ntc filter add dev lo parent 1: basic classid 1:1\ntc class add dev lo classid 1:1 drr\ntc qdisc add dev lo parent 1:1 handle 2: netem\ntc qdisc add dev lo parent 2: handle 3: drr\ntc filter add dev lo parent 3: basic classid 3:1 action mirred egress\nredirect dev dummy0\ntc class add dev lo classid 3:1 drr\nping -c1 -W0.01 localhost # Trigger bug\ntc class del dev lo classid 1:1\ntc class add dev lo classid 1:1 drr\nping -c1 -W0.01 localhost # UaF"
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    "dateReserved": "2024-09-11T15:12:18.280Z",
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The packet is dropped but\\nqdisc_tree_reduce_backlog() is not called to update the parent\u0027s\\nq.qlen, leading to the similar use-after-free as Commit\\ne04991a48dbaf382 (\\\"netem: fix return value if duplicate enqueue\\nfails\\\")\\n\\nCommands to trigger KASAN UaF:\\n\\nip link add type dummy\\nip link set lo up\\nip link set dummy0 up\\ntc qdisc add dev lo parent root handle 1: drr\\ntc filter add dev lo parent 1: basic classid 1:1\\ntc class add dev lo classid 1:1 drr\\ntc qdisc add dev lo parent 1:1 handle 2: netem\\ntc qdisc add dev lo parent 2: handle 3: drr\\ntc filter add dev lo parent 3: basic classid 3:1 action mirred egress\\nredirect dev dummy0\\ntc class add dev lo classid 3:1 drr\\nping -c1 -W0.01 localhost # Trigger bug\\ntc class del dev lo classid 1:1\\ntc class add dev lo classid 1:1 drr\\nping -c1 -W0.01 localhost # UaF\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: sch/netem: se corrige el use after free en netem_dequeue si netem_dequeue() pone en cola el paquete en la qdisc interna y esa qdisc devuelve __NET_XMIT_STOLEN. El paquete se descarta pero no se llama a qdisc_tree_reduce_backlog() para actualizar el q.qlen del padre, lo que lleva a un use after free similar al Commit e04991a48dbaf382 (\\\"netem: corrige el valor de retorno si falla la puesta en cola duplicada\\\") Comandos para activar KASAN UaF: ip link add type dummy ip link set lo up ip link set dummy0 up tc qdisc add dev lo parent root handle 1: drr tc filter add dev lo parent 1: basic classid 1:1 tc class add dev lo classid 1:1 drr tc qdisc add dev lo parent 1:1 handle 2: netem tc qdisc add dev lo parent 2: handle 3: drr tc filter add dev lo parent 3: basic classid 3:1 action mirred egress redirect dev dummy0 tc class add dev lo classid 3:1 drr ping -c1 -W0.01 localhost # Desencadenador de error tc class del dev lo classid 1:1 tc class add dev lo classid 1:1 drr ping -c1 -W0.01 localhost # 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  }
}


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