低危 varnish-cache varnish-modules 空指针解引用
CVE编号
CVE-2021-28543利用情况
暂无补丁情况
官方补丁披露时间
2021-03-17漏洞描述
Varnish varnish-modules before 0.17.1 allows remote attackers to cause a denial of service (daemon restart) in some configurations. This does not affect organizations that only install the Varnish Cache product; however, it is common to install both Varnish Cache and varnish-modules. Specifically, an assertion failure or NULL pointer dereference can be triggered in Varnish Cache through the varnish-modules header.append() and header.copy() functions. For some Varnish Configuration Language (VCL) files, this gives remote clients an opportunity to cause a Varnish Cache restart. A restart reduces overall availability and performance due to an increased number of cache misses, and may cause higher load on backend servers.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://lists.fedoraproject.org/archives/list/package-announce%40lists.fedora... | |
| https://varnish-cache.org/security/VSV00006.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 | |||||||||
| 应用 | varnish-cache | varnish-modules | * | Up to (excluding) 0.17.1 | |||||
| 运行在以下环境 | |||||||||
| 应用 | varnish-cache | varnish-modules_klarlack | * | Up to (excluding) 0.17.1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_10 | varnish-modules | * | Up to (excluding) 0.15.0-1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_11 | varnish-modules | * | Up to (excluding) 0.16.0-2.1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_12 | varnish-modules | * | Up to (excluding) 0.20.0-2 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_sid | varnish-modules | * | Up to (excluding) 0.20.0-2 | |||||
| 运行在以下环境 | |||||||||
| 系统 | fedora_34 | varnish-modules-debuginfo | * | Up to (excluding) 0.17.1-1.fc34 | |||||
- 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 |
| CWE-617 | 可达断言 |
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