关联漏洞
标题：
Linux kernel 资源管理错误漏洞
(CVE-2022-32250)
描述：Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel 5.18.1版本及之前版本存在安全漏洞，该漏洞源于net/netfilter/nf_tables_api.c允许本地用户将权限升级为root用户，攻击者利用该漏洞可导致释放后重用。
描述
LPE PoC of a user-after-free vulnerability in the Linux netfilter subsystem.
介绍
# CVE-2022-32250-LPE
LPE exploit for CVE-2022-32250 - a Use-After-Free vulnerability in netfilter.
My write-up of the vulnerability: [Conquering a Use-After-Free in nf_tables: Detailed Analysis and Exploitation of CVE-2022-32250](https://ysanatomic.github.io/cve-2022-32250/)
## Building
Building requires `libmnl` and `libnftnl`.
```
gcc -lmnl -lnftnl exploit.c -o exploit
```
## Reliability
The vulnerability impacts both versions that have only `KMALLOC_NORMAL` caches and those that also have `KMALLOC_CGROUP`. When making the exploit I only used primitives that would work in both cases - however, testing was conducted on `5.12` which has just `KMALLOC_NORMAL` caches. In theory it works in both cases - in practice, it might take a little bit of work.
The reliability of the exploit is reasonable - bottlenecked by the key limit in Linux which limits our object spraying capabilities (the limit is 200 for non-root users).
The exploit is a **Proof-of-Concept** and is able to achieve local privilege escalation on `5.12.0`. It was not my goal to weaponize it so I cannot at all speak about its reliance on any other version.
## Disclaimer
The **Proof-of-Concept** and the write-up of the vulnerability are for educational and research purposes only. Use at your own risk.
文件快照
[4.0K] /data/pocs/0113f4228d1f2cca4f5188e82365c06171575635
├── [ 21K] exploit.c
├── [1.3K] README.md
└── [ 43K] writeup.md
0 directories, 3 files
备注
1. 建议优先通过来源进行访问。
2. 如果因为来源失效或无法访问，请发送邮箱到 f.jinxu#gmail.com 索取本地快照（把 # 换成 @）。
3. 神龙已为您对POC代码进行快照，为了长期维护，请考虑为本地POC付费，感谢您的支持。