Vulnerability Information
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Vulnerability Title
Asterisk allows `Write=originate` as sufficient permissions for code execution / `System()` dialplan
Vulnerability Description
Asterisk is an open source private branch exchange (PBX) and telephony toolkit. Prior to asterisk versions 18.24.2, 20.9.2, and 21.4.2 and certified-asterisk versions 18.9-cert11 and 20.7-cert2, an AMI user with `write=originate` may change all configuration files in the `/etc/asterisk/` directory. This occurs because they are able to curl remote files and write them to disk, but are also able to append to existing files using the `FILE` function inside the `SET` application. This issue may result in privilege escalation, remote code execution and/or blind server-side request forgery with arbitrary protocol. Asterisk versions 18.24.2, 20.9.2, and 21.4.2 and certified-asterisk versions 18.9-cert11 and 20.7-cert2 contain a fix for this issue.
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L
Vulnerability Type
特权定义了不安全动作
Vulnerability Title
Asterisk 安全漏洞
Vulnerability Description
Asterisk是Asterisk开源的一款PBX系统的软件，运行在Linux系统上，支持使用SIP、IAX、H323协议进行IP通话。 Asterisk 存在安全漏洞，该漏洞源于具有 write=originate 的 AMI 用户可以更改 /etc/asterisk/ 目录中的所有配置文件。
CVSS Information
N/A
Vulnerability Type
N/A