中危 Apache HTTP 服务器：HTTP/2 中的 DoS，初始窗口大小为 0 (CVE-2023-43622)

CVE编号

CVE-2023-43622

利用情况

暂无

补丁情况

官方补丁

披露时间

2023-09-20

漏洞描述

An attacker, opening a HTTP/2 connection with an initial window size of 0, was able to block handling of that connection indefinitely in Apache HTTP Server. This could be used to exhaust worker resources in the server, similar to the well known "slow loris" attack pattern. This has been fixed in version 2.4.58, so that such connection are terminated properly after the configured connection timeout. This issue affects Apache HTTP Server: from 2.4.55 through 2.4.57. Users are recommended to upgrade to version 2.4.58, which fixes the issue.

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://httpd.apache.org/security/vulnerabilities_24.html
https://security.netapp.com/advisory/ntap-20231027-0011/

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
	应用	apache	http_server	*	From (including) 2.4.55	Up to (excluding) 2.4.58
	运行在以下环境
	系统	alpine_3.15	apache2	*		Up to (excluding) 2.4.58-r0
	运行在以下环境
	系统	alpine_3.16	apache2	*		Up to (excluding) 2.4.58-r0
	运行在以下环境
	系统	alpine_3.17	apache2	*		Up to (excluding) 2.4.58-r0
	运行在以下环境
	系统	alpine_3.18	apache2	*		Up to (excluding) 2.4.58-r0
	运行在以下环境
	系统	alpine_edge	apache2	*		Up to (excluding) 2.4.58-r0
	运行在以下环境
	系统	amazon_2	httpd	*		Up to (excluding) 2.4.58-1.amzn2
	运行在以下环境
	系统	amazon_AMI	httpd24	*		Up to (excluding) 2.4.58-1.101.amzn1
	运行在以下环境
	系统	debian_10	apache2	*		Up to (excluding) 2.4.38-3+deb10u8
	运行在以下环境
	系统	debian_11	apache2	*		Up to (including) 2.4.56-1~deb11u2
	运行在以下环境
	系统	debian_12	apache2	*		Up to (including) 2.4.57-2
	运行在以下环境
	系统	debian_sid	apache2	*		Up to (excluding) 2.4.58-1

阿里云评分 6.2

• 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-400	未加控制的资源消耗（资源穷尽）

Exp相关链接

- avd.aliyun.com