CVE-2024-50154

一、漏洞信息
 漏洞编号：[CVE-2024-50154](https://nvd.nist.gov/vuln/detail/CVE-2024-50154)
 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：7.0 High
  Vector：CVSS：3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
 漏洞简述：
  In the Linux kernel, the following vulnerability has been resolved:tcp/dccp: Don t use timer_pending() in reqsk_queue_unlink().Martin KaFai Lau reported use-after-free [0] in reqsk_timer_handler().       We are seeing a use-after-free from a bpf prog attached to  trace_tcp_retransmit_synack. The program passes the req->sk to the  bpf_sk_storage_get_tracing kernel helper which does check for null  before using it.     The commit 83fccfc3940c ( inet: fix potential deadlock inreqsk_queue_unlink() ) added timer_pending() in reqsk_queue_unlink() notto call del_timer_sync() from reqsk_timer_handler(), but it introduced asmall race window.Before the timer is called, expire_timers() calls detach_timer(timer, true)to clear timer->entry.pprev and marks it as not pending.If reqsk_queue_unlink() checks timer_pending() just after expire_timers()calls detach_timer(), TCP will miss del_timer_sync(); the reqsk timer willcontinue running and send multiple SYN+ACKs until it expires.The reported UAF could happen if req->sk is close()d earlier than the timerexpiration, which is 63s by default.The scenario would be  1. inet_csk_complete_hashdance() calls inet_csk_reqsk_queue_drop(),     but del_timer_sync() is missed  2. reqsk timer is executed and scheduled again  3. req->sk is accept()ed and reqsk_put() decrements rsk_refcnt, but     reqsk timer still has another one, and inet_csk_accept() does not     clear req->sk for non-TFO sockets  4. sk is close()d  5. reqsk timer is executed again, and BPF touches req->skLet s not use timer_pending() by passing the caller context to__inet_csk_reqsk_queue_drop().Note that reqsk timer is pinned, so the issue does not happen in mostuse cases. [1][0]BUG: KFENCE: use-after-free read in bpf_sk_storage_get_tracing+0x2e/0x1b0Use-after-free read at 0x00000000a891fb3a (in kfence-#1):bpf_sk_storage_get_tracing+0x2e/0x1b0bpf_prog_5ea3e95db6da0438_tcp_retransmit_synack+0x1d20/0x1ddabpf_trace_run2+0x4c/0xc0tcp_rtx_synack+0xf9/0x100reqsk_timer_handler+0xda/0x3d0run_timer_softirq+0x292/0x8a0irq_exit_rcu+0xf5/0x320sysvec_apic_timer_interrupt+0x6d/0x80asm_sysvec_apic_timer_interrupt+0x16/0x20intel_idle_irq+0x5a/0xa0cpuidle_enter_state+0x94/0x273cpu_startup_entry+0x15e/0x260start_secondary+0x8a/0x90secondary_startup_64_no_verify+0xfa/0xfbkfence-#1: 0x00000000a72cc7b6-0x00000000d97616d9, size=2376, cache=TCPv6allocated by task 0 on cpu 9 at 260507.901592s:sk_prot_alloc+0x35/0x140sk_clone_lock+0x1f/0x3f0inet_csk_clone_lock+0x15/0x160tcp_create_openreq_child+0x1f/0x410tcp_v6_syn_recv_sock+0x1da/0x700tcp_check_req+0x1fb/0x510tcp_v6_rcv+0x98b/0x1420ipv6_list_rcv+0x2258/0x26e0napi_complete_done+0x5b1/0x2990mlx5e_napi_poll+0x2ae/0x8d0net_rx_action+0x13e/0x590irq_exit_rcu+0xf5/0x320common_interrupt+0x80/0x90asm_common_interrupt+0x22/0x40cpuidle_enter_state+0xfb/0x273cpu_startup_entry+0x15e/0x260start_secondary+0x8a/0x90secondary_startup_64_no_verify+0xfa/0xfbfreed by task 0 on cpu 9 at 260507.927527s:rcu_core_si+0x4ff/0xf10irq_exit_rcu+0xf5/0x320sysvec_apic_timer_interrupt+0x6d/0x80asm_sysvec_apic_timer_interrupt+0x16/0x20cpuidle_enter_state+0xfb/0x273cpu_startup_entry+0x15e/0x260start_secondary+0x8a/0x90secondary_startup_64_no_verify+0xfa/0xfb
 漏洞公开时间：2024-11-07 18:15:06
 漏洞创建时间：2024-11-07 18:30:46
 漏洞详情参考链接：
  https://nvd.nist.gov/vuln/detail/CVE-2024-50154
<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/106e457953315e476b3642ef24be25ed862aaba3 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/5071beb59ee416e8ab456ac8647a4dabcda823b1 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/51e34db64f4e43c7b055ccf881b7f3e0c31bb26d |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/8459d61fbf24967839a70235165673148c7c7f17 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/997ae8da14f1639ce6fb66a063dab54031cd61b3 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/c964bf65f80a14288d767023a1b300b30f5b9cd0 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/e8c526f2bdf1845bedaf6a478816a3d06fa78b8f |  |
| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-50154 | https://bugzilla.suse.com/show_bug.cgi?id=1233070 |
| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2024-50154 | https://bugzilla.suse.com/show_bug.cgi?id=1233070 |
| suse_bugzilla | https://git.kernel.org/stable/c/5071beb59ee416e8ab456ac8647a4dabcda823b1 | https://bugzilla.suse.com/show_bug.cgi?id=1233070 |
| suse_bugzilla | https://git.kernel.org/stable/c/51e34db64f4e43c7b055ccf881b7f3e0c31bb26d | https://bugzilla.suse.com/show_bug.cgi?id=1233070 |
| suse_bugzilla | https://git.kernel.org/stable/c/8459d61fbf24967839a70235165673148c7c7f17 | https://bugzilla.suse.com/show_bug.cgi?id=1233070 |
| suse_bugzilla | https://git.kernel.org/stable/c/997ae8da14f1639ce6fb66a063dab54031cd61b3 | https://bugzilla.suse.com/show_bug.cgi?id=1233070 |
| suse_bugzilla | https://git.kernel.org/stable/c/e8c526f2bdf1845bedaf6a478816a3d06fa78b8f | https://bugzilla.suse.com/show_bug.cgi?id=1233070 |
| suse_bugzilla | https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-50154.mbox | https://bugzilla.suse.com/show_bug.cgi?id=1233070 |
| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2024110745-CVE-2024-50154-0259@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2324313 |
| redhat_bugzilla | https://access.redhat.com/errata/RHSA-2025:0578 | https://bugzilla.redhat.com/show_bug.cgi?id=2324313 |
| debian |  | https://security-tracker.debian.org/tracker/CVE-2024-50154 |
| mageia |  | http://advisories.mageia.org/MGASA-2024-0368.html |

</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  |
| ------- | -------- | ------- | -------- | --------- |
|  |  | https://git.kernel.org/stable/c/5071beb59ee416e8ab456ac8647a4dabcda823b1 |  | nvd |
|  |  | https://git.kernel.org/stable/c/51e34db64f4e43c7b055ccf881b7f3e0c31bb26d |  | nvd |
|  |  | https://git.kernel.org/stable/c/8459d61fbf24967839a70235165673148c7c7f17 |  | nvd |
|  |  | https://git.kernel.org/stable/c/997ae8da14f1639ce6fb66a063dab54031cd61b3 |  | nvd |
|  |  | https://git.kernel.org/stable/c/e8c526f2bdf1845bedaf6a478816a3d06fa78b8f |  | nvd |
| linux_kernel | 5.15.170 | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=8459d61fbf24Issue | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=83fccfc3940c | linuxkernelcves |
| linux_kernel | 6.1.115 | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=5071beb59ee4Issue | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=83fccfc3940c | linuxkernelcves |
| linux_kernel | 6.6.59 | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=997ae8da14f1Issue | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=83fccfc3940c | linuxkernelcves |
| linux_kernel | 6.11.6 | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=51e34db64f4eIssue | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=83fccfc3940c | linuxkernelcves |
| linux_kernel | 6.12-rc4 | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=e8c526f2bdf1Issue | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=83fccfc3940c | linuxkernelcves |

</details>

二、漏洞分析结构反馈
 影响性分析说明：
  Reserved.
 openEuler评分：
  7.0
 Vector：CVSS：3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/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):受影响
3.openEuler-22.03-LTS-SP4(5.10.0):受影响
4.openEuler-24.03-LTS(6.6.0):受影响
5.openEuler-24.03-LTS-SP1(6.6.0):受影响
6.master(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(6.6.0):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
8.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.openEuler-22.03-LTS-SP3(5.10.0):正常修复
3.openEuler-22.03-LTS-SP4(5.10.0):正常修复
4.openEuler-24.03-LTS(6.6.0):正常修复
5.openEuler-24.03-LTS-SP1(6.6.0):正常修复
6.master(6.6.0):不受影响-漏洞代码不能被攻击者触发
7.openEuler-24.03-LTS-Next(6.6.0):不受影响-漏洞代码不能被攻击者触发

三、漏洞修复
安全公告链接：https://www.openeuler.org/zh/security/safety-bulletin/detail/?id=openEuler-SA-2024-2495

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