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CVE-2021-47597— inet_diag: fix kernel-infoleak for UDP sockets

AI Predicted 5.3 Difficulty: Moderate EPSS 0.02% · P5

Affected Version Matrix 10

VendorProductVersion RangeStatus
LinuxLinux3c4d05c8056724aff3abc20650807dd828fded54< 7b5596e531253ce84213d9daa7120b71c9d83198affected
3c4d05c8056724aff3abc20650807dd828fded54< 3a4f6dba1eb98101abc012ef968a8b10dac1ce50affected
3c4d05c8056724aff3abc20650807dd828fded54< e5d28205bf1de7082d904ed277ceb2db2879e302affected
3c4d05c8056724aff3abc20650807dd828fded54< 71ddeac8cd1d217744a0e060ff520e147c9328d1affected
3.3affected
< 3.3unaffected
5.4.168≤ 5.4.*unaffected
5.10.88≤ 5.10.*unaffected
… +2 more rows
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I. Basic Information for CVE-2021-47597

Vulnerability Information
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Vulnerability Title
inet_diag: fix kernel-infoleak for UDP sockets
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: inet_diag: fix kernel-infoleak for UDP sockets KMSAN reported a kernel-infoleak [1], that can exploited by unpriv users. After analysis it turned out UDP was not initializing r->idiag_expires. Other users of inet_sk_diag_fill() might make the same mistake in the future, so fix this in inet_sk_diag_fill(). [1] BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:121 [inline] BUG: KMSAN: kernel-infoleak in copyout lib/iov_iter.c:156 [inline] BUG: KMSAN: kernel-infoleak in _copy_to_iter+0x69d/0x25c0 lib/iov_iter.c:670 instrument_copy_to_user include/linux/instrumented.h:121 [inline] copyout lib/iov_iter.c:156 [inline] _copy_to_iter+0x69d/0x25c0 lib/iov_iter.c:670 copy_to_iter include/linux/uio.h:155 [inline] 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 [inline] netlink_recvmsg+0x660/0x1c60 net/netlink/af_netlink.c:1974 sock_recvmsg_nosec net/socket.c:944 [inline] sock_recvmsg net/socket.c:962 [inline] sock_read_iter+0x5a9/0x630 net/socket.c:1035 call_read_iter include/linux/fs.h:2156 [inline] new_sync_read fs/read_write.c:400 [inline] 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 [inline] __se_sys_read fs/read_write.c:627 [inline] __x64_sys_read+0xdb/0x120 fs/read_write.c:627 do_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 Uninit was created at: slab_post_alloc_hook mm/slab.h:524 [inline] slab_alloc_node mm/slub.c:3251 [inline] __kmalloc_node_track_caller+0xe0c/0x1510 mm/slub.c:4974 kmalloc_reserve net/core/skbuff.c:354 [inline] __alloc_skb+0x545/0xf90 net/core/skbuff.c:426 alloc_skb include/linux/skbuff.h:1126 [inline] 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 [inline] 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 [inline] netlink_unicast+0x1095/0x1360 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x16f3/0x1870 net/netlink/af_netlink.c:1916 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg net/socket.c:724 [inline] 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:924 [inline] do_writev+0x63f/0xe30 fs/read_write.c:967 __do_sys_writev fs/read_write.c:1040 [inline] __se_sys_writev fs/read_write.c:1037 [inline] __x64_sys_writev+0xe5/0x120 fs/read_write.c:1037 do_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 Bytes 68-71 of 312 are uninitialized Memory access of size 312 starts at ffff88812ab54000 Data copied to user address 0000000020001440 CPU: 1 PID: 6365 Comm: syz-executor801 Not tainted 5.16.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于内核信息泄漏。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux 3c4d05c8056724aff3abc20650807dd828fded54 ~ 7b5596e531253ce84213d9daa7120b71c9d83198 -
LinuxLinux 3.3 -

II. Public POCs for CVE-2021-47597

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III. Intelligence Information for CVE-2021-47597

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Other References for CVE-2021-47597 (4)

Same Patch Batch · Linux · 2024-06-19 · 122 CVEs total

CVE-2024-38612ipv6: sr: fix invalid unregister error path
CVE-2021-47584iocost: Fix divide-by-zero on donation from low hweight cgroup
CVE-2021-47582USB: core: Make do_proc_control() and do_proc_bulk() killable
CVE-2021-47583media: mxl111sf: change mutex_init() location
CVE-2021-47579ovl: fix warning in ovl_create_real()
CVE-2021-47580scsi: scsi_debug: Fix type in min_t to avoid stack OOB
CVE-2021-47578scsi: scsi_debug: Don't call kcalloc() if size arg is zero
CVE-2021-47576scsi: scsi_debug: Sanity check block descriptor length in resp_mode_select()
CVE-2021-47577io-wq: check for wq exit after adding new worker task_work
CVE-2024-38617kunit/fortify: Fix mismatched kvalloc()/vfree() usage
CVE-2024-38618ALSA: timer: Set lower bound of start tick time
CVE-2024-38616wifi: carl9170: re-fix fortified-memset warning
CVE-2024-38615cpufreq: exit() callback is optional
CVE-2024-38614openrisc: traps: Don't send signals to kernel mode threads
CVE-2024-38613m68k: Fix spinlock race in kernel thread creation
CVE-2024-38611media: i2c: et8ek8: Don't strip remove function when driver is builtin
CVE-2024-38603drivers/perf: hisi: hns3: Actually use devm_add_action_or_reset()
CVE-2024-38601ring-buffer: Fix a race between readers and resize checks
CVE-2024-38600ALSA: Fix deadlocks with kctl removals at disconnection
CVE-2024-38602ax25: Fix reference count leak issues of ax25_dev

Showing top 20 of 122 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2021-47597

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