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CVE-2021-1524— Cisco Meeting Server API Denial of Service Vulnerability

Quick assessment

Affected
Cisco Cisco Meeting Server
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Cisco Meeting Server（Acano Conferencing Server）是美国思科（Cisco）公司的一套包含音频、视频的会议服务器软件。 Cisco Meeting Server存在输入验证错误漏洞，该漏洞源于发送到 API 的请求未经过正确验证。攻击者利用该漏洞可以通过向API发送恶意请求。成功的利用可能允许攻击者导致通话中的所有参与者断开连接，从而导致 DoS 。

CVSS 4.3 · Medium EPSS 1.10% · P64
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I. Basic Information for CVE-2021-1524

Vulnerability Information
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Vulnerability Title
Cisco Meeting Server API Denial of Service Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the API of Cisco Meeting Server could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability exists because requests that are sent to the API are not properly validated. An attacker could exploit this vulnerability by sending a malicious request to the API. A successful exploit could allow the attacker to cause all participants on a call to be disconnected, resulting in a DoS condition.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco Meeting Server 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco Meeting Server（Acano Conferencing Server）是美国思科（Cisco）公司的一套包含音频、视频的会议服务器软件。 Cisco Meeting Server存在输入验证错误漏洞，该漏洞源于发送到 API 的请求未经过正确验证。攻击者利用该漏洞可以通过向API发送恶意请求。成功的利用可能允许攻击者导致通话中的所有参与者断开连接，从而导致 DoS 。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Cisco Cisco Meeting Server n/a -

II. Public POCs for CVE-2021-1524

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III. Intelligence Information for CVE-2021-1524

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Vendor Advisories for CVE-2021-1524 (1)

Same Patch Batch · Cisco · 2021-06-16 · 11 CVEs total

CVE-2021-1566 7.4 HIGH Cisco Email Security Appliance and Cisco Web Security Appliance Certificate Validation Vul
CVE-2021-1542 7.2 HIGH Cisco Small Business 220 Series Smart Switches Vulnerabilities
CVE-2021-1543 7.2 HIGH Cisco Small Business 220 Series Smart Switches Vulnerabilities
CVE-2021-1571 7.2 HIGH Cisco Small Business 220 Series Smart Switches Vulnerabilities
CVE-2021-1541 7.2 HIGH Cisco Small Business 220 Series Smart Switches Vulnerabilities
CVE-2021-1567 7.0 HIGH Cisco AnyConnect Secure Mobility Client for Windows with VPN Posture (HostScan) Module DLL
CVE-2021-1569 6.5 MEDIUM Cisco Jabber Desktop and Mobile Client Software Vulnerabilities
CVE-2021-1570 6.5 MEDIUM Cisco Jabber Desktop and Mobile Client Software Vulnerabilities
CVE-2021-1568 5.5 MEDIUM Cisco AnyConnect Secure Mobility Client for Windows Denial of Service Vulnerability
CVE-2021-1395 4.7 MEDIUM Cisco Unified Intelligence Center Reflected Cross-Site Scripting Vulnerability

IV. Related Vulnerabilities

Same product: Cisco Meeting Server
Same vendor: Cisco
Same weakness: CWE-20

V. Comments for CVE-2021-1524

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