netfilter: nf_tables: don't skip expired elements during walk 漏洞信息(CVE-2023-52924)

一、漏洞 CVE-2023-52924 基础信息

AIGC 神龙大模型
美国国家漏洞数据库 NVD

漏洞标题

netfilter: nf_tables: 在遍历时不要跳过已过期的元素

来源：AIGC 神龙大模型

漏洞描述信息

N/A

来源：AIGC 神龙大模型

CVSS信息

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

来源：AIGC 神龙大模型

漏洞类别

不加限制或调节的资源分配

来源：AIGC 神龙大模型

漏洞标题

netfilter: nf_tables: don't skip expired elements during walk

来源：美国国家漏洞数据库 NVD

漏洞描述信息

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: don't skip expired elements during walk There is an asymmetry between commit/abort and preparation phase if the following conditions are met: 1. set is a verdict map ("1.2.3.4 : jump foo") 2. timeouts are enabled In this case, following sequence is problematic: 1. element E in set S refers to chain C 2. userspace requests removal of set S 3. kernel does a set walk to decrement chain->use count for all elements from preparation phase 4. kernel does another set walk to remove elements from the commit phase (or another walk to do a chain->use increment for all elements from abort phase) If E has already expired in 1), it will be ignored during list walk, so its use count won't have been changed. Then, when set is culled, ->destroy callback will zap the element via nf_tables_set_elem_destroy(), but this function is only safe for elements that have been deactivated earlier from the preparation phase: lack of earlier deactivate removes the element but leaks the chain use count, which results in a WARN splat when the chain gets removed later, plus a leak of the nft_chain structure. Update pipapo_get() not to skip expired elements, otherwise flush command reports bogus ENOENT errors.

来源：美国国家漏洞数据库 NVD

CVSS信息

N/A

来源：美国国家漏洞数据库 NVD

漏洞类别

N/A

来源：美国国家漏洞数据库 NVD

二、漏洞 CVE-2023-52924 的公开POC

#	POC 描述	源链接	神龙链接

三、漏洞 CVE-2023-52924 的情报信息

标题： netfilter: nf_tables: don't skip expired elements during walk - kernel/git/stable/linux.git - Linux kernel stable tree -- 🔗来源链接

标签：
标题： netfilter: nf_tables: don't skip expired elements during walk - kernel/git/stable/linux.git - Linux kernel stable tree -- 🔗来源链接

标签：
标题： netfilter: nf_tables: don't skip expired elements during walk - kernel/git/stable/linux.git - Linux kernel stable tree -- 🔗来源链接

标签：
标题： netfilter: nf_tables: don't skip expired elements during walk - kernel/git/stable/linux.git - Linux kernel stable tree -- 🔗来源链接

标签：
标题： netfilter: nf_tables: don't skip expired elements during walk - kernel/git/stable/linux.git - Linux kernel stable tree -- 🔗来源链接

标签：
标题： netfilter: nf_tables: don't skip expired elements during walk - kernel/git/stable/linux.git - Linux kernel stable tree -- 🔗来源链接

标签：
标题： netfilter: nf_tables: don't skip expired elements during walk - kernel/git/stable/linux.git - Linux kernel stable tree -- 🔗来源链接

标签：
https://nvd.nist.gov/vuln/detail/CVE-2023-52924