cve-2021-47597
Vulnerability from cvelistv5
Published
2024-06-19 14:53
Modified
2024-11-04 12:08
Severity ?
Summary
inet_diag: fix kernel-infoleak for UDP sockets
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3a4f6dba1eb98101abc012ef968a8b10dac1ce50Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/71ddeac8cd1d217744a0e060ff520e147c9328d1Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7b5596e531253ce84213d9daa7120b71c9d83198Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e5d28205bf1de7082d904ed277ceb2db2879e302Patch
Impacted products
LinuxLinux
LinuxLinux
Show details on NVD website

To clipboard 

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          "vendor": "Linux",
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ninet_diag: fix kernel-infoleak for UDP sockets\n\nKMSAN reported a kernel-infoleak [1], that can exploited\nby unpriv users.\n\nAfter analysis it turned out UDP was not initializing\nr-\u003eidiag_expires. Other users of inet_sk_diag_fill()\nmight make the same mistake in the future, so fix this\nin inet_sk_diag_fill().\n\n[1]\nBUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:121 [inline]\nBUG: KMSAN: kernel-infoleak in copyout lib/iov_iter.c:156 [inline]\nBUG: KMSAN: kernel-infoleak in _copy_to_iter+0x69d/0x25c0 lib/iov_iter.c:670\n instrument_copy_to_user include/linux/instrumented.h:121 [inline]\n copyout lib/iov_iter.c:156 [inline]\n _copy_to_iter+0x69d/0x25c0 lib/iov_iter.c:670\n copy_to_iter include/linux/uio.h:155 [inline]\n simple_copy_to_iter+0xf3/0x140 net/core/datagram.c:519\n __skb_datagram_iter+0x2cb/0x1280 net/core/datagram.c:425\n skb_copy_datagram_iter+0xdc/0x270 net/core/datagram.c:533\n skb_copy_datagram_msg include/linux/skbuff.h:3657 [inline]\n netlink_recvmsg+0x660/0x1c60 net/netlink/af_netlink.c:1974\n sock_recvmsg_nosec net/socket.c:944 [inline]\n sock_recvmsg net/socket.c:962 [inline]\n sock_read_iter+0x5a9/0x630 net/socket.c:1035\n call_read_iter include/linux/fs.h:2156 [inline]\n new_sync_read fs/read_write.c:400 [inline]\n vfs_read+0x1631/0x1980 fs/read_write.c:481\n ksys_read+0x28c/0x520 fs/read_write.c:619\n __do_sys_read fs/read_write.c:629 [inline]\n __se_sys_read fs/read_write.c:627 [inline]\n __x64_sys_read+0xdb/0x120 fs/read_write.c:627\n do_syscall_x64 arch/x86/entry/common.c:51 [inline]\n do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nUninit was created at:\n slab_post_alloc_hook mm/slab.h:524 [inline]\n slab_alloc_node mm/slub.c:3251 [inline]\n __kmalloc_node_track_caller+0xe0c/0x1510 mm/slub.c:4974\n kmalloc_reserve net/core/skbuff.c:354 [inline]\n __alloc_skb+0x545/0xf90 net/core/skbuff.c:426\n alloc_skb include/linux/skbuff.h:1126 [inline]\n netlink_dump+0x3d5/0x16a0 net/netlink/af_netlink.c:2245\n __netlink_dump_start+0xd1c/0xee0 net/netlink/af_netlink.c:2370\n netlink_dump_start include/linux/netlink.h:254 [inline]\n inet_diag_handler_cmd+0x2e7/0x400 net/ipv4/inet_diag.c:1343\n sock_diag_rcv_msg+0x24a/0x620\n netlink_rcv_skb+0x447/0x800 net/netlink/af_netlink.c:2491\n sock_diag_rcv+0x63/0x80 net/core/sock_diag.c:276\n netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]\n netlink_unicast+0x1095/0x1360 net/netlink/af_netlink.c:1345\n netlink_sendmsg+0x16f3/0x1870 net/netlink/af_netlink.c:1916\n sock_sendmsg_nosec net/socket.c:704 [inline]\n sock_sendmsg net/socket.c:724 [inline]\n sock_write_iter+0x594/0x690 net/socket.c:1057\n do_iter_readv_writev+0xa7f/0xc70\n do_iter_write+0x52c/0x1500 fs/read_write.c:851\n vfs_writev fs/read_write.c:924 [inline]\n do_writev+0x63f/0xe30 fs/read_write.c:967\n __do_sys_writev fs/read_write.c:1040 [inline]\n __se_sys_writev fs/read_write.c:1037 [inline]\n __x64_sys_writev+0xe5/0x120 fs/read_write.c:1037\n do_syscall_x64 arch/x86/entry/common.c:51 [inline]\n do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nBytes 68-71 of 312 are uninitialized\nMemory access of size 312 starts at ffff88812ab54000\nData copied to user address 0000000020001440\n\nCPU: 1 PID: 6365 Comm: syz-executor801 Not tainted 5.16.0-rc3-syzkaller #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011"
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      "title": "inet_diag: fix kernel-infoleak for UDP sockets",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2021-47597",
    "datePublished": "2024-06-19T14:53:58.902Z",
    "dateReserved": "2024-05-24T15:11:00.734Z",
    "dateUpdated": "2024-11-04T12:08:51.789Z",
    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2021-47597\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-06-19T15:15:54.290\",\"lastModified\":\"2024-08-19T18:15:30.577\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ninet_diag: fix kernel-infoleak for UDP sockets\\n\\nKMSAN reported a kernel-infoleak [1], that can exploited\\nby unpriv users.\\n\\nAfter analysis it turned out UDP was not initializing\\nr-\u003eidiag_expires. Other users of inet_sk_diag_fill()\\nmight make the same mistake in the future, so fix this\\nin inet_sk_diag_fill().\\n\\n[1]\\nBUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:121 [inline]\\nBUG: KMSAN: kernel-infoleak in copyout lib/iov_iter.c:156 [inline]\\nBUG: KMSAN: kernel-infoleak in _copy_to_iter+0x69d/0x25c0 lib/iov_iter.c:670\\n instrument_copy_to_user include/linux/instrumented.h:121 [inline]\\n copyout lib/iov_iter.c:156 [inline]\\n _copy_to_iter+0x69d/0x25c0 lib/iov_iter.c:670\\n copy_to_iter include/linux/uio.h:155 [inline]\\n simple_copy_to_iter+0xf3/0x140 net/core/datagram.c:519\\n __skb_datagram_iter+0x2cb/0x1280 net/core/datagram.c:425\\n skb_copy_datagram_iter+0xdc/0x270 net/core/datagram.c:533\\n skb_copy_datagram_msg include/linux/skbuff.h:3657 [inline]\\n netlink_recvmsg+0x660/0x1c60 net/netlink/af_netlink.c:1974\\n sock_recvmsg_nosec net/socket.c:944 [inline]\\n sock_recvmsg net/socket.c:962 [inline]\\n sock_read_iter+0x5a9/0x630 net/socket.c:1035\\n call_read_iter include/linux/fs.h:2156 [inline]\\n new_sync_read fs/read_write.c:400 [inline]\\n vfs_read+0x1631/0x1980 fs/read_write.c:481\\n ksys_read+0x28c/0x520 fs/read_write.c:619\\n __do_sys_read fs/read_write.c:629 [inline]\\n __se_sys_read fs/read_write.c:627 [inline]\\n __x64_sys_read+0xdb/0x120 fs/read_write.c:627\\n do_syscall_x64 arch/x86/entry/common.c:51 [inline]\\n do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82\\n entry_SYSCALL_64_after_hwframe+0x44/0xae\\n\\nUninit was created at:\\n slab_post_alloc_hook mm/slab.h:524 [inline]\\n slab_alloc_node mm/slub.c:3251 [inline]\\n __kmalloc_node_track_caller+0xe0c/0x1510 mm/slub.c:4974\\n kmalloc_reserve net/core/skbuff.c:354 [inline]\\n __alloc_skb+0x545/0xf90 net/core/skbuff.c:426\\n alloc_skb include/linux/skbuff.h:1126 [inline]\\n netlink_dump+0x3d5/0x16a0 net/netlink/af_netlink.c:2245\\n __netlink_dump_start+0xd1c/0xee0 net/netlink/af_netlink.c:2370\\n netlink_dump_start include/linux/netlink.h:254 [inline]\\n inet_diag_handler_cmd+0x2e7/0x400 net/ipv4/inet_diag.c:1343\\n sock_diag_rcv_msg+0x24a/0x620\\n netlink_rcv_skb+0x447/0x800 net/netlink/af_netlink.c:2491\\n sock_diag_rcv+0x63/0x80 net/core/sock_diag.c:276\\n netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]\\n netlink_unicast+0x1095/0x1360 net/netlink/af_netlink.c:1345\\n netlink_sendmsg+0x16f3/0x1870 net/netlink/af_netlink.c:1916\\n sock_sendmsg_nosec net/socket.c:704 [inline]\\n sock_sendmsg net/socket.c:724 [inline]\\n sock_write_iter+0x594/0x690 net/socket.c:1057\\n do_iter_readv_writev+0xa7f/0xc70\\n do_iter_write+0x52c/0x1500 fs/read_write.c:851\\n vfs_writev fs/read_write.c:924 [inline]\\n do_writev+0x63f/0xe30 fs/read_write.c:967\\n __do_sys_writev fs/read_write.c:1040 [inline]\\n __se_sys_writev fs/read_write.c:1037 [inline]\\n __x64_sys_writev+0xe5/0x120 fs/read_write.c:1037\\n do_syscall_x64 arch/x86/entry/common.c:51 [inline]\\n do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82\\n entry_SYSCALL_64_after_hwframe+0x44/0xae\\n\\nBytes 68-71 of 312 are uninitialized\\nMemory access of size 312 starts at ffff88812ab54000\\nData copied to user address 0000000020001440\\n\\nCPU: 1 PID: 6365 Comm: syz-executor801 Not tainted 5.16.0-rc3-syzkaller #0\\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: inet_diag: corrige la fuga de informaci\u00f3n del kernel para sockets UDP KMSAN inform\u00f3 una fuga de informaci\u00f3n del kernel [1], que puede ser explotada por usuarios sin privilegios. Despu\u00e9s del an\u00e1lisis result\u00f3 que UDP no estaba inicializando r-\u0026gt;idiag_expires. Otros usuarios de inet_sk_diag_fill() podr\u00edan cometer el mismo error en el futuro, as\u00ed que solucione este problema en inet_sk_diag_fill(). [1] ERROR: KMSAN: kernel-infoleak en instrument_copy_to_user include/linux/instrumented.h:121 [en l\u00ednea] ERROR: KMSAN: kernel-infoleak en copia lib/iov_iter.c:156 [en l\u00ednea] ERROR: KMSAN: kernel-infoleak en _copy_to_iter+0x69d/0x25c0 lib/iov_iter.c:670 instrument_copy_to_user include/linux/instrumented.h:121 [en l\u00ednea] copia lib/iov_iter.c:156 [en l\u00ednea] _copy_to_iter+0x69d/0x25c0 lib/iov_iter.c:670 copy_to_iter include/linux/uio.h:155 [en l\u00ednea] simple_copy_to_iter+0xf3/0x140 net/core/datagram.c:519 __skb_datagram_iter+0x2cb/0x1280 net/core/datagram.c:425 skb_copy_datagram_iter+0xdc/0x270 net/core/datagram .c:533 skb_copy_datagram_msg include/linux/skbuff.h:3657 [en l\u00ednea] netlink_recvmsg+0x660/0x1c60 net/netlink/af_netlink.c:1974 sock_recvmsg_nosec net/socket.c:944 [en l\u00ednea] sock_recvmsg net/socket.c:962 [en l\u00ednea] sock_read_iter+0x5a9/0x630 net/socket.c:1035 call_read_iter include/linux/fs.h:2156 [en l\u00ednea] new_sync_read fs/read_write.c:400 [en l\u00ednea] vfs_read+0x1631/0x1980 fs/read_write.c: 481 ksys_read+0x28c/0x520 fs/read_write.c:619 __do_sys_read fs/read_write.c:629 [en l\u00ednea] __se_sys_read fs/read_write.c:627 [en l\u00ednea] __x64_sys_read+0xdb/0x120 fs/read_write.c:627 _arco x64/ x86/entry/common.c:51 [en l\u00ednea] do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82 Entry_SYSCALL_64_after_hwframe+0x44/0xae Uninit se cre\u00f3 en: slab_post_alloc_hook mm/slab.h:524 [en l\u00ednea] slab_alloc_node mm/slub.c:3251 [en l\u00ednea] __kmalloc_node_track_caller+0xe0c/0x1510 mm/slub.c:4974 kmalloc_reserve net/core/skbuff.c:354 [en l\u00ednea] __alloc_skb+0x545/0xf90 net/core/skbuff.c:426 alloc_skb include/linux/skbuff.h:1126 [en l\u00ednea] netlink_dump+0x3d5/0x16a0 net/netlink/af_netlink.c:2245 __netlink_dump_start+0xd1c/0xee0 net/netlink/af_netlink.c:2370 netlink_dump_start include/linux/netlink.h:254 [en l\u00ednea] inet_diag_handler_cmd+0x2e7/0x400 net/ipv4/inet_diag.c:1343 sock_diag_rcv_msg+0x24a/0x620 netlink_rcv_skb+0x447/0x800 net/netlink/af_netlink.c:2491 sock_diag_rcv+0x63/0x80 net/core/sock_diag.c:276 netlink_unicast_kernel net/netlink/af_netlink.c: 1319 [en l\u00ednea] netlink_unicast+0x1095/0x1360 netLink/af_netlink.c: 1345 netlink_sendmsg+0x16f3/0x1870 net/netlink/af_etlink.c: 1916 sockm. C: 704 [ en l\u00ednea] sock_sendmsg net/socket.c:724 [en l\u00ednea] sock_write_iter+0x594/0x690 net/socket.c:1057 do_iter_readv_writev+0xa7f/0xc70 do_iter_write+0x52c/0x1500 fs/read_write.c:851 vfs_writev fs/read_write.c:9 24 [en l\u00ednea] do_writev+0x63f/0xe30 fs/read_write.c:967 __do_sys_writev fs/read_write.c:1040 [en l\u00ednea] __se_sys_writev fs/read_write.c:1037 [en l\u00ednea] __x64_sys_writev+0xe5/0x120 fs/read_write.c:1037 _syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82 Entry_SYSCALL_64_after_hwframe+0x44/0xae Los bytes 68-71 de 312 no est\u00e1n inicializados El acceso a la memoria de tama\u00f1o 312 comienza en ffff88812ab54000 Datos copiados a la direcci\u00f3n de usuario 0000000020001440 CPU: 1 PID: 6365 Comm: syz-executor801 Not tainted 5.16.0-rc3-syzkaller #0 Nombre de hardware: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011\"}],\"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:H/I:N/A:N\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"NONE\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-908\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"3.3\",\"versionEndExcluding\":\"5.4.168\",\"matchCriteriaId\":\"1339B5DB-EBC4-468A-9D4A-0B34B4FA69D3\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.88\",\"matchCriteriaId\":\"A657B2D0-5B9D-42BE-A3BF-228DBC1B057C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.11\",\"matchCriteriaId\":\"11274E95-438A-449A-B100-01B2B0046669\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/3a4f6dba1eb98101abc012ef968a8b10dac1ce50\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/71ddeac8cd1d217744a0e060ff520e147c9328d1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/7b5596e531253ce84213d9daa7120b71c9d83198\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/e5d28205bf1de7082d904ed277ceb2db2879e302\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
  }
}


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