CVE-2021-47597

一、漏洞信息
 漏洞编号：[CVE-2021-47597](https://nvd.nist.gov/vuln/detail/CVE-2021-47597)
 漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)
 漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0,6.6.0
 CVSS V2.0分值：
  BaseScore：0.0 None
  Vector：CVSS：2.0/
 漏洞简述：
  In the Linux kernel, the following vulnerability has been resolved:inet_diag: fix kernel-infoleak for UDP socketsKMSAN reported a kernel-infoleak [1], that can exploitedby unpriv users.After analysis it turned out UDP was not initializingr->idiag_expires. Other users of inet_sk_diag_fill()might make the same mistake in the future, so fix thisin 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+0x44/0xaeUninit 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+0x44/0xaeBytes 68-71 of 312 are uninitializedMemory access of size 312 starts at ffff88812ab54000Data copied to user address 0000000020001440CPU: 1 PID: 6365 Comm: syz-executor801 Not tainted 5.16.0-rc3-syzkaller #0Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 漏洞公开时间：2024-06-19 23:15:54
 漏洞创建时间：2024-06-20 00:37:10
 漏洞详情参考链接：
  https://nvd.nist.gov/vuln/detail/CVE-2021-47597
<details>
<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |
| ------- | -------- | -------- |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/3a4f6dba1eb98101abc012ef968a8b10dac1ce50 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/71ddeac8cd1d217744a0e060ff520e147c9328d1 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/7b5596e531253ce84213d9daa7120b71c9d83198 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/e5d28205bf1de7082d904ed277ceb2db2879e302 |  |
| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-47597 | https://bugzilla.suse.com/show_bug.cgi?id=1226553 |
| suse_bugzilla | https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2021/CVE-2021-47597.mbox | https://bugzilla.suse.com/show_bug.cgi?id=1226553 |
| suse_bugzilla | https://git.kernel.org/stable/c/7b5596e531253ce84213d9daa7120b71c9d83198 | https://bugzilla.suse.com/show_bug.cgi?id=1226553 |
| suse_bugzilla | https://git.kernel.org/stable/c/3a4f6dba1eb98101abc012ef968a8b10dac1ce50 | https://bugzilla.suse.com/show_bug.cgi?id=1226553 |
| suse_bugzilla | https://git.kernel.org/stable/c/e5d28205bf1de7082d904ed277ceb2db2879e302 | https://bugzilla.suse.com/show_bug.cgi?id=1226553 |
| suse_bugzilla | https://git.kernel.org/stable/c/71ddeac8cd1d217744a0e060ff520e147c9328d1 | https://bugzilla.suse.com/show_bug.cgi?id=1226553 |
| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2021-47597 | https://bugzilla.suse.com/show_bug.cgi?id=1226553 |
| ubuntu | https://www.cve.org/CVERecord?id=CVE-2021-47597 | https://ubuntu.com/security/CVE-2021-47597 |
| ubuntu | https://git.kernel.org/linus/71ddeac8cd1d217744a0e060ff520e147c9328d1 (5.16-rc6) | https://ubuntu.com/security/CVE-2021-47597 |
| ubuntu | https://git.kernel.org/stable/c/7b5596e531253ce84213d9daa7120b71c9d83198 | https://ubuntu.com/security/CVE-2021-47597 |
| ubuntu | https://git.kernel.org/stable/c/3a4f6dba1eb98101abc012ef968a8b10dac1ce50 | https://ubuntu.com/security/CVE-2021-47597 |
| ubuntu | https://git.kernel.org/stable/c/e5d28205bf1de7082d904ed277ceb2db2879e302 | https://ubuntu.com/security/CVE-2021-47597 |
| ubuntu | https://git.kernel.org/stable/c/71ddeac8cd1d217744a0e060ff520e147c9328d1 | https://ubuntu.com/security/CVE-2021-47597 |
| ubuntu | https://nvd.nist.gov/vuln/detail/CVE-2021-47597 | https://ubuntu.com/security/CVE-2021-47597 |
| ubuntu | https://launchpad.net/bugs/cve/CVE-2021-47597 | https://ubuntu.com/security/CVE-2021-47597 |
| ubuntu | https://security-tracker.debian.org/tracker/CVE-2021-47597 | https://ubuntu.com/security/CVE-2021-47597 |
| cve_search |  | https://git.kernel.org/stable/c/7b5596e531253ce84213d9daa7120b71c9d83198 |
| cve_search |  | https://git.kernel.org/stable/c/3a4f6dba1eb98101abc012ef968a8b10dac1ce50 |
| cve_search |  | https://git.kernel.org/stable/c/e5d28205bf1de7082d904ed277ceb2db2879e302 |
| cve_search |  | https://git.kernel.org/stable/c/71ddeac8cd1d217744a0e060ff520e147c9328d1 |

</details>

漏洞分析指导链接：
  https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md
 漏洞数据来源:
  openBrain开源漏洞感知系统
 漏洞补丁信息：
  <details>
<summary>详情(点击展开)</summary>

| 影响的包 | 修复版本 | 修复补丁 | 问题引入补丁 | 来源  |
| ------- | -------- | ------- | -------- | --------- |
| linux |  | https://git.kernel.org/linus/71ddeac8cd1d217744a0e060ff520e147c9328d1 | https://git.kernel.org/linus/3c4d05c8056724aff3abc20650807dd828fded54 | ubuntu |

</details>

二、漏洞分析结构反馈
 影响性分析说明：
  In the Linux kernel, the following vulnerability has been resolved:inet_diag: fix kernel-infoleak for UDP socketsKMSAN reported a kernel-infoleak [1], that can exploitedby unpriv users.After analysis it turned out UDP was not initializingr->idiag_expires. Other users of inet_sk_diag_fill()might make the same mistake in the future, so fix thisin 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+0x44/0xaeUninit 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+0x44/0xaeBytes 68-71 of 312 are uninitializedMemory access of size 312 starts at ffff88812ab54000Data copied to user address 0000000020001440CPU: 1 PID: 6365 Comm: syz-executor801 Not tainted 5.16.0-rc3-syzkaller #0Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 openEuler评分：
  3.3
 Vector：CVSS：3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
 受影响版本排查(受影响/不受影响)：
  1.openEuler-20.03-LTS-SP4(4.19.90):受影响
2.openEuler-22.03-LTS-SP1(5.10.0):不受影响
3.openEuler-22.03-LTS-SP3(5.10.0):不受影响
4.openEuler-22.03-LTS-SP4(5.10.0):不受影响
5.master(6.1.0):不受影响
6.openEuler-24.03-LTS(6.6.0):不受影响
7.openEuler-24.03-LTS-Next(6.6.0):不受影响

修复是否涉及abi变化(是/否)：
  1.openEuler-20.03-LTS-SP4(4.19.90):否
2.openEuler-22.03-LTS-SP1(5.10.0):否
3.openEuler-22.03-LTS-SP3(5.10.0):否
4.master(6.1.0):否
5.openEuler-24.03-LTS(6.6.0):否
6.openEuler-24.03-LTS-Next(6.6.0):否
7.openEuler-22.03-LTS-SP4(5.10.0):否

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