中危 Linux：由于异常数据包导致 netback 缓冲区溢出 (CVE-2023-34319)

CVE编号

CVE-2023-34319

利用情况

暂无

补丁情况

官方补丁

披露时间

2023-09-22

漏洞描述

The fix for XSA-423 added logic to Linux'es netback driver to deal with a frontend splitting a packet in a way such that not all of the headers would come in one piece. Unfortunately the logic introduced there didn't account for the extreme case of the entire packet being split into as many pieces as permitted by the protocol, yet still being smaller than the area that's specially dealt with to keep all (possible) headers together. Such an unusual packet would therefore trigger a buffer overrun in the driver.

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://xenbits.xenproject.org/xsa/advisory-432.html

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	amazon_2	kernel	*		Up to (excluding) 4.14.322-244.536.amzn2
	运行在以下环境
	系统	amazon_2023	kernel	*		Up to (excluding) 6.1.49-69.116.amzn2023
	运行在以下环境
	系统	amazon_AMI	kernel	*		Up to (excluding) 4.14.322-170.535.amzn1
	运行在以下环境
	系统	debian_10	linux	*		Up to (including) 4.19.249-2
	运行在以下环境
	系统	debian_11	linux	*		Up to (excluding) 5.10.191-1
	运行在以下环境
	系统	debian_12	linux	*		Up to (excluding) 6.1.52-1
	运行在以下环境
	系统	debian_sid	linux	*		Up to (excluding) 6.4.11-1
	运行在以下环境
	系统	fedora_37	kernel	*		Up to (excluding) 6.4.9-100.fc37
	运行在以下环境
	系统	fedora_38	kernel	*		Up to (excluding) 6.4.9-200.fc38
	运行在以下环境
	系统	suse_12_SP5	kernel	*		Up to (excluding) 4.12.14-122.176.1
	运行在以下环境
	系统	ubuntu_20.04	linux-bluefield	*		Up to (excluding) 5.15.0-1044.48~20.04.1
	运行在以下环境
	系统	ubuntu_22.04	linux-aws-6.2	*		Up to (excluding) 5.15.0-1031.37
	运行在以下环境
	系统	unionos_d	kernel	*		Up to (excluding) 4.19.90-5069
	运行在以下环境
	系统	unionos_e	kernel	*		Up to (excluding) 4.19.90-2305.1.0.0199.64.uel20
	运行在以下环境
	系统	xen	xen	*	From (including) 3.2.0

阿里云评分 6.5

• 攻击路径 本地
• 攻击复杂度 复杂
• 权限要求 普通权限
• 影响范围 越权影响
• EXP成熟度 未验证
• 补丁情况 官方补丁
• 数据保密性 无影响
• 数据完整性 无影响
• 服务器危害 无影响
• 全网数量 N/A

CWE-ID	漏洞类型
CWE-787	跨界内存写

Exp相关链接

- avd.aliyun.com