低危 apache http_server 空指针解引用
CVE编号
CVE-2021-31618利用情况
暂无补丁情况
官方补丁披露时间
2021-06-15漏洞描述
Apache HTTP Server protocol handler for the HTTP/2 protocol checks received request headers against the size limitations as configured for the server and used for the HTTP/1 protocol as well. On violation of these restrictions and HTTP response is sent to the client with a status code indicating why the request was rejected. This rejection response was not fully initialised in the HTTP/2 protocol handler if the offending header was the very first one received or appeared in a a footer. This led to a NULL pointer dereference on initialised memory, crashing reliably the child process. Since such a triggering HTTP/2 request is easy to craft and submit, this can be exploited to DoS the server. This issue affected mod_http2 1.15.17 and Apache HTTP Server version 2.4.47 only. Apache HTTP Server 2.4.47 was never released.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。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 | 1.15.17 | - | |||||
| 运行在以下环境 | |||||||||
| 应用 | apache | http_server | 2.4.47 | - | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.10 | apache2 | * | Up to (excluding) 2.4.48-r0 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.11 | apache2 | * | Up to (excluding) 2.4.48-r0 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.12 | apache2 | * | Up to (excluding) 2.4.48-r0 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.13 | apache2 | * | Up to (excluding) 2.4.48-r0 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.14 | apache2 | * | Up to (excluding) 2.4.48-r0 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.15 | apache2 | * | Up to (excluding) 2.4.48-r0 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.16 | apache2 | * | Up to (excluding) 2.4.48-r0 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.17 | apache2 | * | Up to (excluding) 2.4.48-r0 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.18 | apache2 | * | Up to (excluding) 2.4.48-r0 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_edge | apache2 | * | Up to (excluding) 2.4.48-r0 | |||||
| 运行在以下环境 | |||||||||
| 系统 | amazon_2 | httpd | * | Up to (excluding) 1.15.19-1.amzn2.0.1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_10 | apache2 | * | Up to (excluding) 2.4.38-3+deb10u5 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_11 | apache2 | * | Up to (excluding) 2.4.46-5 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_12 | apache2 | * | Up to (excluding) 2.4.46-5 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_9 | apache2 | * | Up to (excluding) 2.4.25-3+deb9u10 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_sid | apache2 | * | Up to (excluding) 2.4.46-5 | |||||
| 运行在以下环境 | |||||||||
| 系统 | fedora_33 | mod_http2-debuginfo | * | Up to (excluding) 1.15.19-1.fc33 | |||||
| 运行在以下环境 | |||||||||
| 系统 | fedora_34 | mod_http2-debuginfo | * | Up to (excluding) 1.15.19-1.fc34 | |||||
| 运行在以下环境 | |||||||||
| 系统 | opensuse_Leap_15.2 | apache2-prefork | * | Up to (excluding) 2.4.43-lp152.2.15.1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | opensuse_Leap_15.3 | apache2-prefork | * | Up to (excluding) 2.4.43-3.22.1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | suse_12_SP5 | apache2-example-pages | * | Up to (excluding) 2.4.23-29.74.1 | |||||
- 攻击路径 远程
- 攻击复杂度 容易
- 权限要求 无需权限
- 影响范围 有限影响
- EXP成熟度 N/A
- 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 DoS
- 全网数量 N/A
| CWE-ID | 漏洞类型 |
| CWE-476 | 空指针解引用 |
Exp相关链接
版权声明
本站原创文章转载请注明文章出处及链接，谢谢合作！
评论