CVE-2022-48651
Vulnerability from cvelistv5
Published
2024-04-28 13:00
Modified
2024-08-03 15:17
Severity
Summary
ipvlan: Fix out-of-bound bugs caused by unset skb->mac_header
References
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipvlan: Fix out-of-bound bugs caused by unset skb-\u003emac_header\n\nIf an AF_PACKET socket is used to send packets through ipvlan and the\ndefault xmit function of the AF_PACKET socket is changed from\ndev_queue_xmit() to packet_direct_xmit() via setsockopt() with the option\nname of PACKET_QDISC_BYPASS, the skb-\u003emac_header may not be reset and\nremains as the initial value of 65535, this may trigger slab-out-of-bounds\nbugs as following:\n\n=================================================================\nUG: KASAN: slab-out-of-bounds in ipvlan_xmit_mode_l2+0xdb/0x330 [ipvlan]\nPU: 2 PID: 1768 Comm: raw_send Kdump: loaded Not tainted 6.0.0-rc4+ #6\nardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-1.fc33\nall Trace:\nprint_address_description.constprop.0+0x1d/0x160\nprint_report.cold+0x4f/0x112\nkasan_report+0xa3/0x130\nipvlan_xmit_mode_l2+0xdb/0x330 [ipvlan]\nipvlan_start_xmit+0x29/0xa0 [ipvlan]\n__dev_direct_xmit+0x2e2/0x380\npacket_direct_xmit+0x22/0x60\npacket_snd+0x7c9/0xc40\nsock_sendmsg+0x9a/0xa0\n__sys_sendto+0x18a/0x230\n__x64_sys_sendto+0x74/0x90\ndo_syscall_64+0x3b/0x90\nentry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nThe root cause is:\n 1. packet_snd() only reset skb-\u003emac_header when sock-\u003etype is SOCK_RAW\n and skb-\u003eprotocol is not specified as in packet_parse_headers()\n\n 2. packet_direct_xmit() doesn\u0027t reset skb-\u003emac_header as dev_queue_xmit()\n\nIn this case, skb-\u003emac_header is 65535 when ipvlan_xmit_mode_l2() is\ncalled. So when ipvlan_xmit_mode_l2() gets mac header with eth_hdr() which\nuse \"skb-\u003ehead + skb-\u003emac_header\", out-of-bound access occurs.\n\nThis patch replaces eth_hdr() with skb_eth_hdr() in ipvlan_xmit_mode_l2()\nand reset mac header in multicast to solve this out-of-bound bug."
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"title": "ipvlan: Fix out-of-bound bugs caused by unset skb-\u003emac_header",
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"datePublished": "2024-04-28T13:00:42.929Z",
"dateReserved": "2024-02-25T13:44:28.317Z",
"dateUpdated": "2024-08-03T15:17:55.603Z",
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"nvd": "{\"cve\":{\"id\":\"CVE-2022-48651\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-04-28T13:15:07.423\",\"lastModified\":\"2024-07-03T01:39:03.180\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nipvlan: Fix out-of-bound bugs caused by unset skb-\u003emac_header\\n\\nIf an AF_PACKET socket is used to send packets through ipvlan and the\\ndefault xmit function of the AF_PACKET socket is changed from\\ndev_queue_xmit() to packet_direct_xmit() via setsockopt() with the option\\nname of PACKET_QDISC_BYPASS, the skb-\u003emac_header may not be reset and\\nremains as the initial value of 65535, this may trigger slab-out-of-bounds\\nbugs as following:\\n\\n=================================================================\\nUG: KASAN: slab-out-of-bounds in ipvlan_xmit_mode_l2+0xdb/0x330 [ipvlan]\\nPU: 2 PID: 1768 Comm: raw_send Kdump: loaded Not tainted 6.0.0-rc4+ #6\\nardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-1.fc33\\nall Trace:\\nprint_address_description.constprop.0+0x1d/0x160\\nprint_report.cold+0x4f/0x112\\nkasan_report+0xa3/0x130\\nipvlan_xmit_mode_l2+0xdb/0x330 [ipvlan]\\nipvlan_start_xmit+0x29/0xa0 [ipvlan]\\n__dev_direct_xmit+0x2e2/0x380\\npacket_direct_xmit+0x22/0x60\\npacket_snd+0x7c9/0xc40\\nsock_sendmsg+0x9a/0xa0\\n__sys_sendto+0x18a/0x230\\n__x64_sys_sendto+0x74/0x90\\ndo_syscall_64+0x3b/0x90\\nentry_SYSCALL_64_after_hwframe+0x63/0xcd\\n\\nThe root cause is:\\n 1. packet_snd() only reset skb-\u003emac_header when sock-\u003etype is SOCK_RAW\\n and skb-\u003eprotocol is not specified as in packet_parse_headers()\\n\\n 2. packet_direct_xmit() doesn\u0027t reset skb-\u003emac_header as dev_queue_xmit()\\n\\nIn this case, skb-\u003emac_header is 65535 when ipvlan_xmit_mode_l2() is\\ncalled. So when ipvlan_xmit_mode_l2() gets mac header with eth_hdr() which\\nuse \\\"skb-\u003ehead + skb-\u003emac_header\\\", out-of-bound access occurs.\\n\\nThis patch replaces eth_hdr() with skb_eth_hdr() in ipvlan_xmit_mode_l2()\\nand reset mac header in multicast to solve this out-of-bound bug.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ipvlan: corrige errores fuera de los l\u00edmites causados por skb-\u0026gt;mac_header no configurado si se usa un socket AF_PACKET para enviar paquetes a trav\u00e9s de ipvlan y se cambia la funci\u00f3n xmit predeterminada del socket AF_PACKET desde dev_queue_xmit() a paquete_direct_xmit() a trav\u00e9s de setsockopt() con el nombre de opci\u00f3n PACKET_QDISC_BYPASS, es posible que skb-\u0026gt;mac_header no se restablezca y permanezca en el valor inicial de 65535, esto puede desencadenar errores de losa fuera de los l\u00edmites como se muestra a continuaci\u00f3n : =================================================== ================ UG: KASAN: losa fuera de los l\u00edmites en ipvlan_xmit_mode_l2+0xdb/0x330 [ipvlan] PU: 2 PID: 1768 Comm: raw_send Kdump: cargado No contaminado 6.0.0-rc4+ #6 nombre de hardware: PC est\u00e1ndar QEMU (i440FX + PIIX, 1996), BIOS 1.14.0-1.fc33 todo Seguimiento: print_address_description.constprop.0+0x1d/0x160 print_report.cold+0x4f/0x112 kasan_report+ 0xa3/0x130 ipvlan_xmit_mode_l2+0xdb/0x330 [ipvlan] ipvlan_start_xmit+0x29/0xa0 [ipvlan] __dev_direct_xmit+0x2e2/0x380 paquete_direct_xmit+0x22/0x60 paquete_snd+0x7c9/0xc40 0x9a/0xa0 __sys_sendto+0x18a/0x230 __x64_sys_sendto+0x74/0x90 do_syscall_64 +0x3b/0x90 Entry_SYSCALL_64_after_hwframe+0x63/0xcd La causa principal es: 1. paquete_snd() solo restablece skb-\u0026gt;mac_header cuando sock-\u0026gt;tipo es SOCK_RAW y skb-\u0026gt;protocolo no se especifica como en paquete_parse_headers() 2. paquete_direct_xmit() no restablece skb-\u0026gt;mac_header como dev_queue_xmit() En este caso, skb-\u0026gt;mac_header es 65535 cuando se llama a ipvlan_xmit_mode_l2(). Entonces, cuando ipvlan_xmit_mode_l2() obtiene el encabezado mac con eth_hdr() que usa \\\"skb-\u0026gt;head + skb-\u0026gt;mac_header\\\", se produce un acceso fuera de los l\u00edmites. Este parche reemplaza eth_hdr() con skb_eth_hdr() en ipvlan_xmit_mode_l2() y restablece el encabezado de mac en multidifusi\u00f3n para resolver este error fuera de los l\u00edmites.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\",\"baseScore\":7.7,\"baseSeverity\":\"HIGH\"},\"exploitabilityScore\":2.5,\"impactScore\":5.2}]},\"weaknesses\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-125\"}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/25efdbe5fe542c3063d1948cc4e98abcb57621ca\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/346e94aa4a99378592c46d6a34c72703a32bd5be\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/81225b2ea161af48e093f58e8dfee6d705b16af4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8d06006c7eb75587d986da46c48ba9274f94e8e7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ab4a733874ead120691e8038272d22f8444d3638\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b583e6b25bf9321c91154f6c78d2173ef12c4241\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/bffcdade259c05ab3436b5fab711612093c275ef\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e2b46cd5796f083e452fbc624f65b80328b0c1a4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
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}
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