Description

In the Linux kernel, the following vulnerability has been resolved: sctp: fix kernel-infoleak for SCTP sockets syzbot reported a kernel infoleak [1] of 4 bytes. After analysis, it turned out r->idiag_expires is not initialized if inet_sctp_diag_fill() calls inet_diag_msg_common_fill() Make sure to clear idiag_timer/idiag_retrans/idiag_expires and let inet_diag_msg_sctpasoc_fill() fill them again if needed. [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:154 [inline] BUG: KMSAN: kernel-infoleak in _copy_to_iter+0x6ef/0x25a0 lib/iov_iter.c:668 instrument_copy_to_user include/linux/instrumented.h:121 [inline] copyout lib/iov_iter.c:154 [inline] _copy_to_iter+0x6ef/0x25a0 lib/iov_iter.c:668 copy_to_iter include/linux/uio.h:162 [inline] simple_copy_to_iter+0xf3/0x140 net/core/datagram.c:519 __skb_datagram_iter+0x2d5/0x11b0 net/core/datagram.c:425 skb_copy_datagram_iter+0xdc/0x270 net/core/datagram.c:533 skb_copy_datagram_msg include/linux/skbuff.h:3696 [inline] netlink_recvmsg+0x669/0x1c80 net/netlink/af_netlink.c:1977 sock_recvmsg_nosec net/socket.c:948 [inline] sock_recvmsg net/socket.c:966 [inline] __sys_recvfrom+0x795/0xa10 net/socket.c:2097 __do_sys_recvfrom net/socket.c:2115 [inline] __se_sys_recvfrom net/socket.c:2111 [inline] __x64_sys_recvfrom+0x19d/0x210 net/socket.c:2111 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:737 [inline] slab_alloc_node mm/slub.c:3247 [inline] __kmalloc_node_track_caller+0xe0c/0x1510 mm/slub.c:4975 kmalloc_reserve net/core/skbuff.c:354 [inline] __alloc_skb+0x545/0xf90 net/core/skbuff.c:426 alloc_skb include/linux/skbuff.h:1158 [inline] netlink_dump+0x3e5/0x16c0 net/netlink/af_netlink.c:2248 __netlink_dump_start+0xcf8/0xe90 net/netlink/af_netlink.c:2373 netlink_dump_start include/linux/netlink.h:254 [inline] inet_diag_handler_cmd+0x2e7/0x400 net/ipv4/inet_diag.c:1341 sock_diag_rcv_msg+0x24a/0x620 netlink_rcv_skb+0x40c/0x7e0 net/netlink/af_netlink.c:2494 sock_diag_rcv+0x63/0x80 net/core/sock_diag.c:277 netlink_unicast_kernel net/netlink/af_netlink.c:1317 [inline] netlink_unicast+0x1093/0x1360 net/netlink/af_netlink.c:1343 netlink_sendmsg+0x14d9/0x1720 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:705 [inline] sock_sendmsg net/socket.c:725 [inline] sock_write_iter+0x594/0x690 net/socket.c:1061 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+0x645/0xe00 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 2508 are uninitialized Memory access of size 2508 starts at ffff888114f9b000 Data copied to user address 00007f7fe09ff2e0 CPU: 1 PID: 3478 Comm: syz-executor306 Not tainted 5.17.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011

Metrics

 

CVSS Version 4.0 CVSS Version 3.x CVSS Version 2.0

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.

CVSS 4.0 Severity and Vector Strings:

NIST: NVD

N/A

NVD assessment not yet provided.

CVSS 3.x Severity and Vector Strings:

NIST: NVD

Base Score:  7.1 HIGH

Vector:  CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

CVSS 2.0 Severity and Vector Strings:

NIST: NVD

Base Score: N/A

NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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Hyperlink	Resource
https://git.kernel.org/stable/c/1502f15b9f29c41883a6139f2923523873282a83	Patch
https://git.kernel.org/stable/c/2d8fa3fdf4542a2174a72d92018f488d65d848c5	Patch
https://git.kernel.org/stable/c/3fc0fd724d199e061432b66a8d85b7d48fe485f7	Patch
https://git.kernel.org/stable/c/41a2864cf719c17294f417726edd411643462ab8	Patch
https://git.kernel.org/stable/c/633593a808980f82d251d0ca89730d8bb8b0220c	Patch
https://git.kernel.org/stable/c/b7e4d9ba2ddb78801488b4c623875b81fb46b545	Patch
https://git.kernel.org/stable/c/bbf59d7ae558940cfa2b36a287fd1e88d83f89f8	Patch
https://git.kernel.org/stable/c/d828b0fe6631f3ae8709ac9a10c77c5836c76a08	Patch

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-401	Missing Release of Memory after Effective Lifetime	NIST

Known Affected Software Configurations Switch to CPE 2.2

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Change History

2 change records found show changes

Initial Analysis by NIST 7/23/2024 11:23:59 AM

Action	Type	Old Value	New Value
Added	CPE Configuration		Record truncated, showing 500 of 759 characters. View Entire Change Record OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.7 up to (excluding) 4.9.307 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.10 up to (excluding) 4.14.272 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.15 up to (excluding) 4.19.235 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.20 up to (excluding) 5.4.185 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from
Added	CVSS V3.1		NIST AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Added	CWE		NIST CWE-401
Changed	Reference Type	https://git.kernel.org/stable/c/1502f15b9f29c41883a6139f2923523873282a83 No Types Assigned	https://git.kernel.org/stable/c/1502f15b9f29c41883a6139f2923523873282a83 Patch
Changed	Reference Type	https://git.kernel.org/stable/c/2d8fa3fdf4542a2174a72d92018f488d65d848c5 No Types Assigned	https://git.kernel.org/stable/c/2d8fa3fdf4542a2174a72d92018f488d65d848c5 Patch
Changed	Reference Type	https://git.kernel.org/stable/c/3fc0fd724d199e061432b66a8d85b7d48fe485f7 No Types Assigned	https://git.kernel.org/stable/c/3fc0fd724d199e061432b66a8d85b7d48fe485f7 Patch
Changed	Reference Type	https://git.kernel.org/stable/c/41a2864cf719c17294f417726edd411643462ab8 No Types Assigned	https://git.kernel.org/stable/c/41a2864cf719c17294f417726edd411643462ab8 Patch
Changed	Reference Type	https://git.kernel.org/stable/c/633593a808980f82d251d0ca89730d8bb8b0220c No Types Assigned	https://git.kernel.org/stable/c/633593a808980f82d251d0ca89730d8bb8b0220c Patch
Changed	Reference Type	https://git.kernel.org/stable/c/b7e4d9ba2ddb78801488b4c623875b81fb46b545 No Types Assigned	https://git.kernel.org/stable/c/b7e4d9ba2ddb78801488b4c623875b81fb46b545 Patch
Changed	Reference Type	https://git.kernel.org/stable/c/bbf59d7ae558940cfa2b36a287fd1e88d83f89f8 No Types Assigned	https://git.kernel.org/stable/c/bbf59d7ae558940cfa2b36a287fd1e88d83f89f8 Patch
Changed	Reference Type	https://git.kernel.org/stable/c/d828b0fe6631f3ae8709ac9a10c77c5836c76a08 No Types Assigned	https://git.kernel.org/stable/c/d828b0fe6631f3ae8709ac9a10c77c5836c76a08 Patch

New CVE Received by NIST 7/16/2024 9:15:12 AM

Action	Type	Old Value	New Value
Added	Description		Record truncated, showing 500 of 3338 characters. View Entire Change Record In the Linux kernel, the following vulnerability has been resolved: sctp: fix kernel-infoleak for SCTP sockets syzbot reported a kernel infoleak [1] of 4 bytes. After analysis, it turned out r->idiag_expires is not initialized if inet_sctp_diag_fill() calls inet_diag_msg_common_fill() Make sure to clear idiag_timer/idiag_retrans/idiag_expires and let inet_diag_msg_sctpasoc_fill() fill them again if needed. [1] BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumente
Added	Reference		kernel.org https://git.kernel.org/stable/c/1502f15b9f29c41883a6139f2923523873282a83 [No types assigned]
Added	Reference		kernel.org https://git.kernel.org/stable/c/2d8fa3fdf4542a2174a72d92018f488d65d848c5 [No types assigned]
Added	Reference		kernel.org https://git.kernel.org/stable/c/3fc0fd724d199e061432b66a8d85b7d48fe485f7 [No types assigned]
Added	Reference		kernel.org https://git.kernel.org/stable/c/41a2864cf719c17294f417726edd411643462ab8 [No types assigned]
Added	Reference		kernel.org https://git.kernel.org/stable/c/633593a808980f82d251d0ca89730d8bb8b0220c [No types assigned]
Added	Reference		kernel.org https://git.kernel.org/stable/c/b7e4d9ba2ddb78801488b4c623875b81fb46b545 [No types assigned]
Added	Reference		kernel.org https://git.kernel.org/stable/c/bbf59d7ae558940cfa2b36a287fd1e88d83f89f8 [No types assigned]
Added	Reference		kernel.org https://git.kernel.org/stable/c/d828b0fe6631f3ae8709ac9a10c77c5836c76a08 [No types assigned]