漏洞信息
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Vulnerability Title
FreeSWITCH: Pre-authentication bandwidth amplification via `mod_verto` speed-test frames
Vulnerability Description
FreeSWITCH is a Software Defined Telecom Stack enabling the digital transformation from proprietary telecom switches to a software implementation that runs on any commodity hardware. Prior to version 1.11.1, mod_verto's WebSocket frame loop intercepts a #-prefixed speed-test protocol (#SPU / #SPB / #SPE) before any authentication check. The declared payload size in #SPU was parsed with atoi() and only rejected non-positive values, so an unauthenticated peer could request up to INT_MAX bytes. The server then wrote roughly size * 10 bytes back during the download phase, on the order of 20 GB per request, yielding strong outbound bandwidth amplification from a short request. This issue has been patched in version 1.11.1.
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Vulnerability Title
FreeSWITCH 资源管理错误漏洞
Vulnerability Description
FreeSWITCH是美国Anthony Minessale个人开发者的研发的一套免费、开源的通信软件。该软件可用于创建音、视频以及短消息类产品和应用。 FreeSWITCH 1.11.1之前版本存在资源管理错误漏洞,该漏洞源于mod_verto的WebSocket帧循环在任何身份验证检查之前拦截以#为前缀的速度测试协议,使用atoi解析#SPU中声明的有效载荷大小,仅拒绝非正值,因此未经身份验证的对等端可以请求最多INT_MAX字节,服务器在下载阶段回写大约size乘以10字节的数据,每个请求约20 G
CVSS Information
N/A
Vulnerability Type
N/A