net:不要在 dst_release() 中延迟 dst_entries_add()(CVE-2024-50036)

admin 2024-10-25 00:45:01 Ali_nvd 来源:ZONE.CI 全球网 0 阅读模式
net:不要在 dst_release() 中延迟 dst_entries_add()(CVE-2024-50036)

CVE编号

CVE-2024-50036

利用情况

暂无

补丁情况

N/A

披露时间

2024-10-22
漏洞描述
In the Linux kernel, the following vulnerability has been resolved: net: do not delay dst_entries_add() in dst_release() dst_entries_add() uses per-cpu data that might be freed at netns dismantle from ip6_route_net_exit() calling dst_entries_destroy() Before ip6_route_net_exit() can be called, we release all the dsts associated with this netns, via calls to dst_release(), which waits an rcu grace period before calling dst_destroy() dst_entries_add() use in dst_destroy() is racy, because dst_entries_destroy() could have been called already. Decrementing the number of dsts must happen sooner. Notes: 1) in CONFIG_XFRM case, dst_destroy() can call dst_release_immediate(child), this might also cause UAF if the child does not have DST_NOCOUNT set. IPSEC maintainers might take a look and see how to address this. 2) There is also discussion about removing this count of dst, which might happen in future kernels.
解决建议
建议您更新当前系统或软件至最新版,完成漏洞的修复。
参考链接
https://git.kernel.org/stable/c/3c7c918ec0aa3555372c5a57f18780b7a96c5cfc
https://git.kernel.org/stable/c/ac888d58869bb99753e7652be19a151df9ecb35d
https://git.kernel.org/stable/c/eae7435b48ffc8e9be0ff9cfeae40af479a609dd
CVSS3评分 N/A
  • 攻击路径 N/A
  • 攻击复杂度 N/A
  • 权限要求 N/A
  • 影响范围 N/A
  • 用户交互 N/A
  • 可用性 N/A
  • 保密性 N/A
  • 完整性 N/A
N/A
CWE-ID 漏洞类型
- avd.aliyun.com
weinxin
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