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CVE-2021-34743— Cisco Webex Software Application Authorization Bypass Vulnerability

Quick assessment

Affected
Cisco Cisco Webex Meetings
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 Webex是美国思科（Cisco）公司的一个视频会议和协作产品套件。 Cisco Webex 存在跨站请求伪造漏洞，未经身份验证的远程攻击者可能会在未经用户明确同意的情况下授权外部应用程序集成并访问用户帐户。

CVSS 4.3 · Medium EPSS 0.47% · P39
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I. Basic Information for CVE-2021-34743

Vulnerability Information
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Vulnerability Title
Cisco Webex Software Application Authorization Bypass Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the application integration feature of Cisco Webex Software could allow an unauthenticated, remote attacker to authorize an external application to integrate with and access a user's account without that user's express consent. This vulnerability is due to improper validation of cross-site request forgery (CSRF) tokens. An attacker could exploit this vulnerability by convincing a targeted user who is currently authenticated to Cisco Webex Software to follow a link designed to pass malicious input to the Cisco Webex Software application authorization interface. A successful exploit could allow the attacker to cause Cisco Webex Software to authorize an application on the user's behalf without the express consent of the user, possibly allowing external applications to read data from that user's profile.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
跨站请求伪造(CSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco Webex 跨站请求伪造漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco Webex是美国思科（Cisco）公司的一个视频会议和协作产品套件。 Cisco Webex 存在跨站请求伪造漏洞，未经身份验证的远程攻击者可能会在未经用户明确同意的情况下授权外部应用程序集成并访问用户帐户。
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 Webex Meetings n/a -

II. Public POCs for CVE-2021-34743

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III. Intelligence Information for CVE-2021-34743

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Vendor Advisories for CVE-2021-34743 (1)

Same Patch Batch · Cisco · 2021-10-21 · 9 CVEs total

CVE-2021-1529 7.8 HIGH Cisco IOS XE SD-WAN Software Command Injection Vulnerability
CVE-2021-40121 6.1 MEDIUM Cisco Identity Services Engine Cross-Site Scripting Vulnerabilities
CVE-2021-34738 6.1 MEDIUM Cisco Identity Services Engine Cross-Site Scripting Vulnerabilities
CVE-2021-40122 5.9 MEDIUM Cisco Meeting Server Call Bridge Denial of Service Vulnerability
CVE-2021-34736 5.3 MEDIUM Cisco Integrated Management Controller GUI Denial of Service Vulnerability
CVE-2021-34789 4.8 MEDIUM Cisco Tetration Stored Cross-Site Scripting Vulnerability
CVE-2021-40123 4.3 MEDIUM Cisco Identity Services Engine File Download Vulnerability
CVE-2021-34760 Cisco TelePresence Management Suite Stored Cross-Site Scripting Vulnerability

IV. Related Vulnerabilities

Same product: Cisco Webex Meetings
Same vendor: Cisco
Same weakness: CWE-352

V. Comments for CVE-2021-34743

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