discourse discourse_footnote 对异常条件的处理不恰当
CVE编号
CVE-2021-43827利用情况
暂无补丁情况
N/A披露时间
2021-12-15漏洞描述
discourse-footnote is a library providing footnotes for posts in Discourse. ### Impact When posting an inline footnote wrapped in `<a>` tags (e.g. `<a>^[footnote]</a>`, the resulting rendered HTML would include a nested `<a>`, which is stripped by Nokogiri because it is not valid. This then caused a javascript error on topic pages because we were looking for an `<a>` element inside the footnote reference span and getting its ID, and because it did not exist we got a null reference error in javascript. Users are advised to update to version 0.2. As a workaround editing offending posts from the rails console or the database console for self-hosters, or disabling the plugin in the admin panel can mitigate this 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://github.com/discourse/discourse-footnote/commit/796617e013127701120754... | |
| https://github.com/discourse/discourse-footnote/security/advisories/GHSA-58vr... |
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 | discourse | discourse_footnote | * | Up to (excluding) 0.2 | |||||
- 攻击路径 网络
- 攻击复杂度 低
- 权限要求 低
- 影响范围 未更改
- 用户交互 无
- 可用性 低
- 保密性 无
- 完整性 无
| CWE-ID | 漏洞类型 |
| CWE-755 | 对异常条件的处理不恰当 |
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