CVE-2022-49330

一、漏洞信息
 漏洞编号：[CVE-2022-49330](https://nvd.nist.gov/vuln/detail/CVE-2022-49330)
 漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)
 漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.19,6.1.8,6.4.0,6.6.0
 CVSS V3.0分值：
  BaseScore：5.5 Medium
  Vector：CVSS：3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
 漏洞简述：
  In the Linux kernel, the following vulnerability has been resolved:tcp: fix tcp_mtup_probe_success vs wrong snd_cwndsyzbot got a new report [1] finally pointing to a very old bug,added in initial support for MTU probing.tcp_mtu_probe() has checks about starting an MTU probe iftcp_snd_cwnd(tp) >= 11.But nothing prevents tcp_snd_cwnd(tp) to be reduced laterand before the MTU probe succeeds.This bug would lead to potential zero-divides.Debugging added in commit 40570375356c ( tcp: add accessorsto read/set tp->snd_cwnd ) has paid off :)While we are at it, address potential overflows in this code.[1]WARNING: CPU: 1 PID: 14132 at include/net/tcp.h:1219 tcp_mtup_probe_success+0x366/0x570 net/ipv4/tcp_input.c:2712Modules linked in:CPU: 1 PID: 14132 Comm: syz-executor.2 Not tainted 5.18.0-syzkaller-07857-gbabf0bb978e3 #0Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011RIP: 0010:tcp_snd_cwnd_set include/net/tcp.h:1219 [inline]RIP: 0010:tcp_mtup_probe_success+0x366/0x570 net/ipv4/tcp_input.c:2712Code: 74 08 48 89 ef e8 da 80 17 f9 48 8b 45 00 65 48 ff 80 80 03 00 00 48 83 c4 30 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 aa b0 c5 f8 <0f> 0b e9 16 fe ff ff 48 8b 4c 24 08 80 e1 07 38 c1 0f 8c c7 fc ffRSP: 0018:ffffc900079e70f8 EFLAGS: 00010287RAX: ffffffff88c0f7f6 RBX: ffff8880756e7a80 RCX: 0000000000040000RDX: ffffc9000c6c4000 RSI: 0000000000031f9e RDI: 0000000000031f9fRBP: 0000000000000000 R08: ffffffff88c0f606 R09: ffffc900079e7520R10: ffffed101011226d R11: 1ffff1101011226c R12: 1ffff1100eadcf50R13: ffff8880756e72c0 R14: 1ffff1100eadcf89 R15: dffffc0000000000FS:  00007f643236e700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033CR2: 00007f1ab3f1e2a0 CR3: 0000000064fe7000 CR4: 00000000003506e0DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400Call Trace: <TASK> tcp_clean_rtx_queue+0x223a/0x2da0 net/ipv4/tcp_input.c:3356 tcp_ack+0x1962/0x3c90 net/ipv4/tcp_input.c:3861 tcp_rcv_established+0x7c8/0x1ac0 net/ipv4/tcp_input.c:5973 tcp_v6_do_rcv+0x57b/0x1210 net/ipv6/tcp_ipv6.c:1476 sk_backlog_rcv include/net/sock.h:1061 [inline] __release_sock+0x1d8/0x4c0 net/core/sock.c:2849 release_sock+0x5d/0x1c0 net/core/sock.c:3404 sk_stream_wait_memory+0x700/0xdc0 net/core/stream.c:145 tcp_sendmsg_locked+0x111d/0x3fc0 net/ipv4/tcp.c:1410 tcp_sendmsg+0x2c/0x40 net/ipv4/tcp.c:1448 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg net/socket.c:734 [inline] __sys_sendto+0x439/0x5c0 net/socket.c:2119 __do_sys_sendto net/socket.c:2131 [inline] __se_sys_sendto net/socket.c:2127 [inline] __x64_sys_sendto+0xda/0xf0 net/socket.c:2127 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0RIP: 0033:0x7f6431289109Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48RSP: 002b:00007f643236e168 EFLAGS: 00000246 ORIG_RAX: 000000000000002cRAX: ffffffffffffffda RBX: 00007f643139c100 RCX: 00007f6431289109RDX: 00000000d0d0c2ac RSI: 0000000020000080 RDI: 000000000000000aRBP: 00007f64312e308d R08: 0000000000000000 R09: 0000000000000000R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000R13: 00007fff372533af R14: 00007f643236e300 R15: 0000000000022000
 漏洞公开时间：2025-02-26 15:01:09
 漏洞创建时间：2025-02-26 14:35:27
 漏洞详情参考链接：
  https://nvd.nist.gov/vuln/detail/CVE-2022-49330
<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/11825765291a93d8e7f44230da67b9f607c777bf |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/29e13f6b38f0816af2012e0725507754e8f4569c |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/38ca71a24cd4845021eed35fd2594d89dba9a5a8 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/42726877453afdbe1508a8a96884ea907741d9a7 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/602b338e3c3cd7f935f3f5011882961d074e5ac1 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/90385f2b65d0cd2b3b1ac8909f0cc6dd31062cfc |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/9ba2b4ac35935f05ac98cff722f36ba07d62270e |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/aa7f333efd1138a68517a6a6a69ae540dd59d800 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/f2845e1504a3bc4f3381394f057e8b63cb5f3f7a |  |
| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2022-49330 | https://bugzilla.suse.com/show_bug.cgi?id=1238378 |
| suse_bugzilla | https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2022/CVE-2022-49330.mbox | https://bugzilla.suse.com/show_bug.cgi?id=1238378 |
| suse_bugzilla | https://git.kernel.org/stable/c/29e13f6b38f0816af2012e0725507754e8f4569c | https://bugzilla.suse.com/show_bug.cgi?id=1238378 |
| suse_bugzilla | https://git.kernel.org/stable/c/42726877453afdbe1508a8a96884ea907741d9a7 | https://bugzilla.suse.com/show_bug.cgi?id=1238378 |
| suse_bugzilla | https://git.kernel.org/stable/c/f2845e1504a3bc4f3381394f057e8b63cb5f3f7a | https://bugzilla.suse.com/show_bug.cgi?id=1238378 |
| suse_bugzilla | https://git.kernel.org/stable/c/602b338e3c3cd7f935f3f5011882961d074e5ac1 | https://bugzilla.suse.com/show_bug.cgi?id=1238378 |
| suse_bugzilla | https://git.kernel.org/stable/c/9ba2b4ac35935f05ac98cff722f36ba07d62270e | https://bugzilla.suse.com/show_bug.cgi?id=1238378 |
| suse_bugzilla | https://git.kernel.org/stable/c/90385f2b65d0cd2b3b1ac8909f0cc6dd31062cfc | https://bugzilla.suse.com/show_bug.cgi?id=1238378 |
| suse_bugzilla | https://git.kernel.org/stable/c/aa7f333efd1138a68517a6a6a69ae540dd59d800 | https://bugzilla.suse.com/show_bug.cgi?id=1238378 |
| suse_bugzilla | https://git.kernel.org/stable/c/38ca71a24cd4845021eed35fd2594d89dba9a5a8 | https://bugzilla.suse.com/show_bug.cgi?id=1238378 |
| suse_bugzilla | https://git.kernel.org/stable/c/11825765291a93d8e7f44230da67b9f607c777bf | https://bugzilla.suse.com/show_bug.cgi?id=1238378 |
| suse_bugzilla | https://bugzilla.redhat.com/show_bug.cgi?id=2348206 | https://bugzilla.suse.com/show_bug.cgi?id=1238378 |

</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>

无
</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:tcp: fix tcp_mtup_probe_success vs wrong snd_cwndsyzbot got a new report [1] finally pointing to a very old bug,added in initial support for MTU probing.tcp_mtu_probe() has checks about starting an MTU probe iftcp_snd_cwnd(tp) >= 11.But nothing prevents tcp_snd_cwnd(tp) to be reduced laterand before the MTU probe succeeds.This bug would lead to potential zero-divides.Debugging added in commit 40570375356c ( tcp: add accessorsto read/set tp->snd_cwnd ) has paid off :)While we are at it, address potential overflows in this code.[1]WARNING: CPU: 1 PID: 14132 at include/net/tcp.h:1219 tcp_mtup_probe_success+0x366/0x570 net/ipv4/tcp_input.c:2712Modules linked in:CPU: 1 PID: 14132 Comm: syz-executor.2 Not tainted 5.18.0-syzkaller-07857-gbabf0bb978e3 #0Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011RIP: 0010:tcp_snd_cwnd_set include/net/tcp.h:1219 [inline]RIP: 0010:tcp_mtup_probe_success+0x366/0x570 net/ipv4/tcp_input.c:2712Code: 74 08 48 89 ef e8 da 80 17 f9 48 8b 45 00 65 48 ff 80 80 03 00 00 48 83 c4 30 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 aa b0 c5 f8 <0f> 0b e9 16 fe ff ff 48 8b 4c 24 08 80 e1 07 38 c1 0f 8c c7 fc ffRSP: 0018:ffffc900079e70f8 EFLAGS: 00010287RAX: ffffffff88c0f7f6 RBX: ffff8880756e7a80 RCX: 0000000000040000RDX: ffffc9000c6c4000 RSI: 0000000000031f9e RDI: 0000000000031f9fRBP: 0000000000000000 R08: ffffffff88c0f606 R09: ffffc900079e7520R10: ffffed101011226d R11: 1ffff1101011226c R12: 1ffff1100eadcf50R13: ffff8880756e72c0 R14: 1ffff1100eadcf89 R15: dffffc0000000000FS:  00007f643236e700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033CR2: 00007f1ab3f1e2a0 CR3: 0000000064fe7000 CR4: 00000000003506e0DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400Call Trace: <TASK> tcp_clean_rtx_queue+0x223a/0x2da0 net/ipv4/tcp_input.c:3356 tcp_ack+0x1962/0x3c90 net/ipv4/tcp_input.c:3861 tcp_rcv_established+0x7c8/0x1ac0 net/ipv4/tcp_input.c:5973 tcp_v6_do_rcv+0x57b/0x1210 net/ipv6/tcp_ipv6.c:1476 sk_backlog_rcv include/net/sock.h:1061 [inline] __release_sock+0x1d8/0x4c0 net/core/sock.c:2849 release_sock+0x5d/0x1c0 net/core/sock.c:3404 sk_stream_wait_memory+0x700/0xdc0 net/core/stream.c:145 tcp_sendmsg_locked+0x111d/0x3fc0 net/ipv4/tcp.c:1410 tcp_sendmsg+0x2c/0x40 net/ipv4/tcp.c:1448 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg net/socket.c:734 [inline] __sys_sendto+0x439/0x5c0 net/socket.c:2119 __do_sys_sendto net/socket.c:2131 [inline] __se_sys_sendto net/socket.c:2127 [inline] __x64_sys_sendto+0xda/0xf0 net/socket.c:2127 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0RIP: 0033:0x7f6431289109Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48RSP: 002b:00007f643236e168 EFLAGS: 00000246 ORIG_RAX: 000000000000002cRAX: ffffffffffffffda RBX: 00007f643139c100 RCX: 00007f6431289109RDX: 00000000d0d0c2ac RSI: 0000000020000080 RDI: 000000000000000aRBP: 00007f64312e308d R08: 0000000000000000 R09: 0000000000000000R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000R13: 00007fff372533af R14: 00007f643236e300 R15: 0000000000022000
 openEuler评分：
  5.5
 Vector：CVSS：3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
 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-SP3(5.10.0):不受影响
3.openEuler-22.03-LTS-SP4(5.10.0):不受影响
4.master(6.6.0):不受影响
5.openEuler-24.03-LTS(6.6.0):不受影响
6.openEuler-24.03-LTS-Next(6.6.0):不受影响
7.openEuler-24.03-LTS-SP1(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-SP3(5.10.0):否
3.master(6.6.0):否
4.openEuler-24.03-LTS(6.6.0):否
5.openEuler-24.03-LTS-Next(6.6.0):否
6.openEuler-22.03-LTS-SP4(5.10.0):否
7.openEuler-24.03-LTS-SP1(6.6.0):否

原因说明：
  1.openEuler-20.03-LTS-SP4(4.19.90):正常修复
2.master(6.6.0):不受影响-漏洞代码不能被攻击者触发
3.openEuler-24.03-LTS-Next(6.6.0):不受影响-漏洞代码不能被攻击者触发
4.openEuler-22.03-LTS-SP3(5.10.0):不受影响-漏洞代码不存在
5.openEuler-22.03-LTS-SP4(5.10.0):不受影响-漏洞代码不存在
6.openEuler-24.03-LTS(6.6.0):不受影响-漏洞代码不存在
7.openEuler-24.03-LTS-SP1(6.6.0):不受影响-漏洞代码不存在

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