中危 Apache Tomcat WebSocket 拒绝服务漏洞
CVE编号
CVE-2020-13935利用情况
EXP 已公开补丁情况
官方补丁披露时间
2020-07-15漏洞描述
Apache Tomcat是由Apache软件基金会属下Jakarta项目开发的Servlet容器。Tomcat官方于7月份修复了CVE-2020-13935 websocket 拒绝服务漏洞。近日，国外某安全团队公开了相关poc代码，在受影响版本内的Tomcat开启websocket的情况下将会导致拒绝服务。阿里云应急响应中心提醒Tomcat用户尽快采取安全措施阻止漏洞攻击。解决建议
1. 升级至Apache Tomcat至安全版本及其以上。2. 若无特殊需要，关闭Tomcat Websocket功能，删除example下的websocket示例。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 | tomcat | * | From (including) 7.0.27 | Up to (including) 7.0.104 | ||||
| 运行在以下环境 | |||||||||
| 应用 | apache | tomcat | * | From (including) 8.5.0 | Up to (including) 8.5.56 | ||||
| 运行在以下环境 | |||||||||
| 应用 | apache | tomcat | * | From (including) 9.0.1 | Up to (including) 9.0.36 | ||||
| 运行在以下环境 | |||||||||
| 应用 | apache | tomcat | 10.0.0 | - | |||||
| 运行在以下环境 | |||||||||
| 应用 | apache | tomcat | 9.0.0 | - | |||||
| 运行在以下环境 | |||||||||
| 系统 | alibaba_cloud_linux_2.1903 | tomcat-admin-webapps | * | Up to (excluding) 7.0.76-15.1.al7 | |||||
| 运行在以下环境 | |||||||||
| 系统 | amazon_2 | tomcat | * | Up to (excluding) 7.0.76-10.amzn2.0.4 | |||||
| 运行在以下环境 | |||||||||
| 系统 | amazon_AMI | tomcat8 | * | Up to (excluding) 8.5.57-1.85.amzn1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | centos_7 | tomcat | * | Up to (excluding) 7.0.76-15.el7 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_10 | tomcat9 | * | Up to (excluding) 9.0.31-1~deb10u2 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_11 | tomcat9 | * | Up to (excluding) 9.0.37-1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_12 | tomcat9 | * | Up to (excluding) 9.0.37-1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_9 | tomcat8 | * | Up to (excluding) 8.5.54-0+deb9u3 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_sid | tomcat9 | * | Up to (excluding) 9.0.37-1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | kylinos_aarch64_V10 | tomcat | * | Up to (excluding) 7.0.76-16.el7_9 | |||||
| 运行在以下环境 | |||||||||
| 系统 | kylinos_aarch64_V10SP1 | tomcat | * | Up to (excluding) 9.0.10-20.ky10 | |||||
| 运行在以下环境 | |||||||||
| 系统 | kylinos_aarch64_V10SP2 | tomcat | * | Up to (excluding) 9.0.10-20.ky10 | |||||
| 运行在以下环境 | |||||||||
| 系统 | kylinos_x86_64_V10 | tomcat | * | Up to (excluding) 7.0.76-16.el7_9 | |||||
| 运行在以下环境 | |||||||||
| 系统 | kylinos_x86_64_V10SP1 | tomcat | * | Up to (excluding) 9.0.10-20.ky10 | |||||
| 运行在以下环境 | |||||||||
| 系统 | kylinos_x86_64_V10SP2 | tomcat | * | Up to (excluding) 9.0.10-20.ky10 | |||||
| 运行在以下环境 | |||||||||
| 系统 | opensuse_Leap_15.1 | tomcat-javadoc | * | Up to (excluding) 9.0.36-lp151.3.27.1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | opensuse_Leap_15.2 | tomcat-javadoc | * | Up to (excluding) 9.0.36-lp152.2.4.1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | oracle_7 | oraclelinux-release | * | Up to (excluding) 7.0.76-15.el7 | |||||
| 运行在以下环境 | |||||||||
| 系统 | redhat_7 | tomcat | * | Up to (excluding) 7.0.76-15.el7 | |||||
| 运行在以下环境 | |||||||||
| 系统 | suse_12_SP5 | tomcat-el-3_0-api | * | Up to (excluding) 9.0.36-3.45.1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_16.04 | tomcat8 | * | Up to (excluding) 8.0.32-1ubuntu1.13 | |||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_16.04.7_lts | tomcat8 | * | Up to (excluding) 8.0.32-1ubuntu1.13 | |||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_20.04 | tomcat9 | * | Up to (excluding) 9.0.31-1ubuntu0.1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | unionos_d | tomcat9 | * | Up to (excluding) 9.0.31-1~deb10u2 | |||||
- 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 EXP 已公开
- 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-835 | 不可达退出条件的循环（无限循环） |
Exp相关链接
- avd.aliyun.com
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