CVE-2023-52435

一、漏洞信息
 漏洞编号：[CVE-2023-52435](https://nvd.nist.gov/vuln/detail/CVE-2023-52435)
 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
 CVSS V2.0分值：
  BaseScore：0.0 Low
  Vector：CVSS：2.0/
 漏洞简述：
  In the Linux kernel, the following vulnerability has been resolved:net: prevent mss overflow in skb_segment()Once again syzbot is able to crash the kernel in skb_segment() [1]GSO_BY_FRAGS is a forbidden value, but unfortunately the followingcomputation in skb_segment() can reach it quite easily :	mss = mss * partial_segs;65535 = 3 * 5 * 17 * 257, so many initial values of mss can lead toa bad final result.Make sure to limit segmentation so that the new mss value is smallerthan GSO_BY_FRAGS.[1]general protection fault, probably for non-canonical address 0xdffffc000000000e: 0000 [#1] PREEMPT SMP KASANKASAN: null-ptr-deref in range [0x0000000000000070-0x0000000000000077]CPU: 1 PID: 5079 Comm: syz-executor993 Not tainted 6.7.0-rc4-syzkaller-00141-g1ae4cd3cbdd0 #0Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023RIP: 0010:skb_segment+0x181d/0x3f30 net/core/skbuff.c:4551Code: 83 e3 02 e9 fb ed ff ff e8 90 68 1c f9 48 8b 84 24 f8 00 00 00 48 8d 78 70 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 8a 21 00 00 48 8b 84 24 f8 00RSP: 0018:ffffc900043473d0 EFLAGS: 00010202RAX: dffffc0000000000 RBX: 0000000000010046 RCX: ffffffff886b1597RDX: 000000000000000e RSI: ffffffff886b2520 RDI: 0000000000000070RBP: ffffc90004347578 R08: 0000000000000005 R09: 000000000000ffffR10: 000000000000ffff R11: 0000000000000002 R12: ffff888063202ac0R13: 0000000000010000 R14: 000000000000ffff R15: 0000000000000046FS: 0000555556e7e380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033CR2: 0000000020010000 CR3: 0000000027ee2000 CR4: 00000000003506f0DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400Call Trace:<TASK>udp6_ufo_fragment+0xa0e/0xd00 net/ipv6/udp_offload.c:109ipv6_gso_segment+0x534/0x17e0 net/ipv6/ip6_offload.c:120skb_mac_gso_segment+0x290/0x610 net/core/gso.c:53__skb_gso_segment+0x339/0x710 net/core/gso.c:124skb_gso_segment include/net/gso.h:83 [inline]validate_xmit_skb+0x36c/0xeb0 net/core/dev.c:3626__dev_queue_xmit+0x6f3/0x3d60 net/core/dev.c:4338dev_queue_xmit include/linux/netdevice.h:3134 [inline]packet_xmit+0x257/0x380 net/packet/af_packet.c:276packet_snd net/packet/af_packet.c:3087 [inline]packet_sendmsg+0x24c6/0x5220 net/packet/af_packet.c:3119sock_sendmsg_nosec net/socket.c:730 [inline]__sock_sendmsg+0xd5/0x180 net/socket.c:745__sys_sendto+0x255/0x340 net/socket.c:2190__do_sys_sendto net/socket.c:2202 [inline]__se_sys_sendto net/socket.c:2198 [inline]__x64_sys_sendto+0xe0/0x1b0 net/socket.c:2198do_syscall_x64 arch/x86/entry/common.c:52 [inline]do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83entry_SYSCALL_64_after_hwframe+0x63/0x6bRIP: 0033:0x7f8692032aa9Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 d1 19 00 00 90 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:00007fff8d685418 EFLAGS: 00000246 ORIG_RAX: 000000000000002cRAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f8692032aa9RDX: 0000000000010048 RSI: 00000000200000c0 RDI: 0000000000000003RBP: 00000000000f4240 R08: 0000000020000540 R09: 0000000000000014R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff8d685480R13: 0000000000000001 R14: 00007fff8d685480 R15: 0000000000000003</TASK>Modules linked in:---[ end trace 0000000000000000 ]---RIP: 0010:skb_segment+0x181d/0x3f30 net/core/skbuff.c:4551Code: 83 e3 02 e9 fb ed ff ff e8 90 68 1c f9 48 8b 84 24 f8 00 00 00 48 8d 78 70 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 8a 21 00 00 48 8b 84 24 f8 00RSP: 0018:ffffc900043473d0 EFLAGS: 00010202RAX: dffffc0000000000 RBX: 0000000000010046 RCX: ffffffff886b1597RDX: 000000000000000e RSI: ffffffff886b2520 RDI: 0000000000000070RBP: ffffc90004347578 R0---truncated---
 漏洞公开时间：2024-02-21 04:15:08
 漏洞创建时间：2024-02-21 04:31:19
 漏洞详情参考链接：
  https://nvd.nist.gov/vuln/detail/CVE-2023-52435
<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/23d05d563b7e7b0314e65c8e882bc27eac2da8e7 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/6c53e8547687d9c767c139cd4b50af566f58c29a |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/8f8f185643747fbb448de6aab0efa51c679909a3 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/95b3904a261a9f810205da560e802cc326f50d77 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/989b0ff35fe5fc9652ee5bafbe8483db6f27b137 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/cd1022eaf87be8e6151435bd4df4c242c347e083 |  |
| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-52435 | https://bugzilla.suse.com/show_bug.cgi?id=1220138 |
| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2023-52435 | https://bugzilla.suse.com/show_bug.cgi?id=1220138 |
| suse_bugzilla | https://git.kernel.org/stable/c/23d05d563b7e7b0314e65c8e882bc27eac2da8e7 | https://bugzilla.suse.com/show_bug.cgi?id=1220138 |
| suse_bugzilla | https://git.kernel.org/stable/c/95b3904a261a9f810205da560e802cc326f50d77 | https://bugzilla.suse.com/show_bug.cgi?id=1220138 |
| redhat_bugzilla | https://git.kernel.org/stable/c/23d05d563b7e7b0314e65c8e882bc27eac2da8e7 | https://bugzilla.redhat.com/show_bug.cgi?id=2265292 |
| redhat_bugzilla | https://git.kernel.org/stable/c/95b3904a261a9f810205da560e802cc326f50d77 | https://bugzilla.redhat.com/show_bug.cgi?id=2265292 |
| cve_search |  | https://git.kernel.org/stable/c/95b3904a261a9f810205da560e802cc326f50d77 |
| cve_search |  | https://git.kernel.org/stable/c/23d05d563b7e7b0314e65c8e882bc27eac2da8e7 |
| cve_search |  | https://git.kernel.org/stable/c/cd1022eaf87be8e6151435bd4df4c242c347e083 |
| cve_search |  | https://git.kernel.org/stable/c/8f8f185643747fbb448de6aab0efa51c679909a3 |
| cve_search |  | https://git.kernel.org/stable/c/6c53e8547687d9c767c139cd4b50af566f58c29a |
| cve_search |  | https://git.kernel.org/stable/c/989b0ff35fe5fc9652ee5bafbe8483db6f27b137 |

</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：
    A flaw was found in the Linux kernel’s net/core/skbuff.c subsystem. The GSO_BY_FRAGS is a forbidden value and allows the following computation in skb_segment() to reach it. The : mss = mss * partial_segs and many initial mss values can lead to a bad final result. Limit the segmentation so that the new mss value is smaller than GSO_BY_FRAGS. 
 openEuler评分：
  4.7
 Vector：CVSS：2.0/AV:L/AC:H/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-SP1(4.19.90):受影响
2.openEuler-20.03-LTS-SP3(4.19.90):受影响
3.openEuler-20.03-LTS-SP4(4.19.90):受影响
4.openEuler-22.03-LTS(5.10.0):受影响
5.openEuler-22.03-LTS-SP1(5.10.0):受影响
6.openEuler-22.03-LTS-SP2(5.10.0):受影响
7.openEuler-22.03-LTS-SP3(5.10.0):受影响
8.openEuler-22.03-LTS-Next(5.10.0):受影响
9.master(6.1.0):不受影响

修复是否涉及abi变化(是/否)：
  1.openEuler-20.03-LTS-SP1(4.19.90):否
2.openEuler-20.03-LTS-SP3(4.19.90):否
3.openEuler-20.03-LTS-SP4(4.19.90):否
4.openEuler-22.03-LTS(5.10.0):否
5.openEuler-22.03-LTS-SP1(5.10.0):否
6.openEuler-22.03-LTS-SP2(5.10.0):否
7.openEuler-22.03-LTS-SP3(5.10.0):否
8.master(6.1.0):否
9.openEuler-22.03-LTS-Next(5.10.0):否

三、漏洞修复
安全公告链接：https://www.openeuler.org/zh/security/safety-bulletin/detail/?id=openEuler-SA-2024-1244

Hi openeuler-ci-bot, welcome to the openEuler Community.
I'm the Bot here serving you. You can find the instructions on how to interact with me at Here.
If you have any questions, please contact the SIG: Kernel, and any of the maintainers.

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**issue处理注意事项:** 
**1. 当前issue受影响的分支提交pr时, 须在pr描述中填写当前issue编号进行关联, 否则无法关闭当前issue;**
**2. 模板内容需要填写完整, 无论是受影响或者不受影响都需要填写完整内容,未引入的分支不需要填写, 否则无法关闭当前issue;**
**3. 以下为模板中需要填写完整的内容, 请复制到评论区回复, 注: 内容的标题名称(影响性分析说明, openEuler评分, 受影响版本排查(受影响/不受影响), 修复是否涉及abi变化(是/否))不能省略,省略后cve-manager将无法正常解析填写内容.**
************************************************************************
影响性分析说明:

openEuler评分: (评分和向量)

受影响版本排查(受影响/不受影响): 
1.master(6.1.0):
2.openEuler-20.03-LTS-SP1(4.19.90):
3.openEuler-20.03-LTS-SP4(4.19.90):
4.openEuler-22.03-LTS(5.10.0):
5.openEuler-22.03-LTS-Next(5.10.0):
6.openEuler-22.03-LTS-SP1(5.10.0):
7.openEuler-22.03-LTS-SP2(5.10.0):
8.openEuler-22.03-LTS-SP3(5.10.0):

修复是否涉及abi变化(是/否)：
1.master(6.1.0):
2.openEuler-20.03-LTS-SP1(4.19.90):
3.openEuler-20.03-LTS-SP4(4.19.90):
4.openEuler-22.03-LTS(5.10.0):
5.openEuler-22.03-LTS-Next(5.10.0):
6.openEuler-22.03-LTS-SP1(5.10.0):
7.openEuler-22.03-LTS-SP2(5.10.0):
8.openEuler-22.03-LTS-SP3(5.10.0):

-----------------------------------------------------------------------
issue处理具体操作请参考: 
https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md
pr关联issue具体操作请参考:
https://gitee.com/help/articles/4142

参考网址	关联pr	状态	补丁链接
https://nvd.nist.gov/vuln/detail/CVE-2023-52435	None	None	https://git.kernel.org/stable/c/95b3904a261a9f810205da560e802cc326f50d77 https://git.kernel.org/stable/c/23d05d563b7e7b0314e65c8e882bc27eac2da8e7
https://ubuntu.com/security/CVE-2023-52435	None	None	https://discourse.ubuntu.com/c/ubuntu-pro
https://www.opencve.io/cve/CVE-2023-52435	None	None	https://git.kernel.org/stable/c/95b3904a261a9f810205da560e802cc326f50d77 https://git.kernel.org/stable/c/23d05d563b7e7b0314e65c8e882bc27eac2da8e7
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2023-52435
https://security-tracker.debian.org/tracker/CVE-2023-52435	None	None	https://git.kernel.org/linus/23d05d563b7e7b0314e65c8e882bc27eac2da8e7

说明：补丁链接仅供初步排查参考，实际可用性请人工再次确认，补丁下载验证可使用CVE补丁工具。
若补丁不准确，烦请在此issue下评论 '/report-patch 参考网址补丁链接1,补丁链接2' 反馈正确信息，便于我们不断优化工具，不胜感激。
如 /report-patch https://security-tracker.debian.org/tracker/CVE-2021-3997 https://github.com/systemd/systemd/commit/5b1cf7a9be37e20133c0208005274ce4a5b5c6a1

CVE-2023-52435
I92HXW

影响性分析说明：
A flaw was found in the Linux kernel’s net/core/skbuff.c subsystem. The GSO_BY_FRAGS is a forbidden value and allows the following computation in skb_segment() to reach it. The : mss = mss * partial_segs and many initial mss values can lead to a bad final result. Limit the segmentation so that the new mss value is smaller than GSO_BY_FRAGS.

openEuler评分:(评分和向量)
4.7
CVSS:3.1/AV:L/AC:H/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-SP1(4.19.90):受影响
2.openEuler-20.03-LTS-SP3:受影响
3.openEuler-20.03-LTS-SP4:受影响
4.openEuler-22.03-LTS:受影响
5.openEuler-22.03-LTS-SP1:受影响
6.openEuler-22.03-LTS-SP2:受影响
7.openEuler-22.03-LTS-SP3:受影响
8.master(6.1.0):不受影响
9.openEuler-22.03-LTS-Next:受影响

修复是否涉及abi变化(是/否)：
1.openEuler-20.03-LTS-SP1(4.19.90):否
2.openEuler-20.03-LTS-SP3:否
3.openEuler-20.03-LTS-SP4:否
4.openEuler-22.03-LTS:否
5.openEuler-22.03-LTS-SP1:否
6.openEuler-22.03-LTS-SP2:否
7.openEuler-22.03-LTS-SP3:否
8.master(6.1.0):否
9.openEuler-22.03-LTS-Next:否

@CTC-XiboWang 经过 cve-manager 解析, 已分析的内容如下表所示:
| 状态  | 需分析 | 内容 |
|:--:|:--:|---------|
|已分析|1.影响性分析说明|A flaw was found in the Linux kernel’s net/core/skbuff.c subsystem. The GSO_BY_FRAGS is a forbidden value and allows the following computation in skb_segment() to reach it. The : mss = mss * partial_segs and many initial mss values can lead to a bad final result. Limit the segmentation so that the new mss value is smaller than GSO_BY_FRAGS.|
|已分析|2.openEulerScore|4.7|
|已分析|3.openEulerVector|AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H|
|已分析|4.受影响版本排查|openEuler-20.03-LTS-SP1:受影响,openEuler-20.03-LTS-SP3:受影响,openEuler-20.03-LTS-SP4:受影响,openEuler-22.03-LTS:受影响,openEuler-22.03-LTS-SP1:受影响,openEuler-22.03-LTS-SP2:受影响,openEuler-22.03-LTS-SP3:受影响,openEuler-22.03-LTS-Next:受影响,master:不受影响|
|已分析|5.修复是否涉及abi变化|openEuler-20.03-LTS-SP1:否,openEuler-20.03-LTS-SP3:否,openEuler-20.03-LTS-SP4:否,openEuler-22.03-LTS:否,openEuler-22.03-LTS-SP1:否,openEuler-22.03-LTS-SP2:否,openEuler-22.03-LTS-SP3:否,master:否,openEuler-22.03-LTS-Next:否|

**请确认分析内容的准确性, 确认无误后, 您可以进行后续步骤, 否则您可以继续分析.**

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