netfilter：nf_tables：修复 __nft_flowtable_type_get() 中潜在的数据争用 (CVE-2024-35898)

CVE编号

CVE-2024-35898

利用情况

暂无

补丁情况

N/A

披露时间

2024-05-19

漏洞描述

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: Fix potential data-race in __nft_flowtable_type_get() nft_unregister_flowtable_type() within nf_flow_inet_module_exit() can concurrent with __nft_flowtable_type_get() within nf_tables_newflowtable(). And thhere is not any protection when iterate over nf_tables_flowtables list in __nft_flowtable_type_get(). Therefore, there is pertential data-race of nf_tables_flowtables list entry. Use list_for_each_entry_rcu() to iterate over nf_tables_flowtables list in __nft_flowtable_type_get(), and use rcu_read_lock() in the caller nft_flowtable_type_get() to protect the entire type query process.

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/24225011d81b471acc0e1e315b7d9905459a6304
https://git.kernel.org/stable/c/2485bcfe05ee3cf9ca8923a94fa2e456924c79c8
https://git.kernel.org/stable/c/69d1fe14a680042ec913f22196b58e2c8ff1b007
https://git.kernel.org/stable/c/8b891153b2e4dc0ca9d9dab8f619d49c740813df
https://git.kernel.org/stable/c/940d41caa71f0d3a52df2fde5fada524a993e331
https://git.kernel.org/stable/c/9b5b7708ec2be21dd7ef8ca0e3abe4ae9f3b083b
https://git.kernel.org/stable/c/a347bc8e6251eaee4b619da28020641eb5b0dd77
https://git.kernel.org/stable/c/e684b1674fd1ca4361812a491242ae871d6b2859

受影响软件情况

#	类型	厂商	产品	版本	影响面
1
	运行在以下环境
	系统	debian_11	linux	*		Up to (excluding) 5.10.216-1
	运行在以下环境
	系统	debian_12	linux	*		Up to (excluding) 6.1.85-1

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

Exp相关链接

- avd.aliyun.com