中危 apereo opencast dtd中递归实体索引的不恰当限制(xml实体扩展)
CVE编号
CVE-2021-32623利用情况
暂无补丁情况
官方补丁披露时间
2021-06-16漏洞描述
Opencast is a free and open source solution for automated video capture and distribution. Versions of Opencast prior to 9.6 are vulnerable to the billion laughs attack, which allows an attacker to easily execute a (seemingly permanent) denial of service attack, essentially taking down Opencast using a single HTTP request. To exploit this, users need to have ingest privileges, limiting the group of potential attackers The problem has been fixed in Opencast 9.6. There is no known workaround for 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/opencast/opencast/commit/8ae27da5a6f658011a5741b3210e715b0dc6213e | |
https://github.com/opencast/opencast/security/advisories/GHSA-9gwx-9cwp-5c2m |
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 | apereo | opencast | * | Up to (excluding) 9.6 |
- 攻击路径 本地
- 攻击复杂度 困难
- 权限要求 普通权限
- 影响范围 有限影响
- 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-776 | DTD中递归实体索引的不恰当限制(XML实体扩展) |
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