libbpf：ringbuf mmap 的句柄大小溢出（CVE-2022-49030）

CVE编号

CVE-2022-49030

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: libbpf: Handle size overflow for ringbuf mmap The maximum size of ringbuf is 2GB on x86-64 host, so 2 * max_entries will overflow u32 when mapping producer page and data pages. Only casting max_entries to size_t is not enough, because for 32-bits application on 64-bits kernel the size of read-only mmap region also could overflow size_t. So fixing it by casting the size of read-only mmap region into a __u64 and checking whether or not there will be overflow during mmap.

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/0140e079a42064680394fff1199a7b5483688dec
https://git.kernel.org/stable/c/535a25ab4f9a45f74ba38ab71de95e97474922ed
https://git.kernel.org/stable/c/8a549ab6724520aa3c07f47e0eba820293551490
https://git.kernel.org/stable/c/927cbb478adf917e0a142b94baa37f06279cc466

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) 5.10.158-1
	运行在以下环境
	系统	debian_12	linux	*		Up to (excluding) 6.0.12-1

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