CVE-2020-3434— Cisco AnyConnect Secure Mobility Client for Windows Denial of Service Vulnerability
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I. Basic Information for CVE-2020-3434
Vulnerability Information
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Vulnerability Title
Cisco AnyConnect Secure Mobility Client for Windows Denial of Service Vulnerability
Source: NVD (National Vulnerability Database)
Vulnerability Description
A vulnerability in the interprocess communication (IPC) channel of Cisco AnyConnect Secure Mobility Client for Windows could allow an authenticated, local attacker to cause a denial of service (DoS) condition on an affected device. To exploit this vulnerability, the attacker would need to have valid credentials on the Windows system. The vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending a crafted IPC message to the AnyConnect process on an affected device. A successful exploit could allow the attacker to stop the AnyConnect process, causing a DoS condition on the device. To exploit this vulnerability, the attacker would need to have valid credentials on the Windows system.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
输入验证不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Cisco AnyConnect Secure Mobility Client 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco AnyConnect Secure Mobility Client for Windows是美国思科（Cisco）公司的一款基于Windows平台的可通过任何设备安全访问网络和应用的安全移动客户端。 基于Windows平台的Cisco AnyConnect Secure Mobility Client 4.9.00086及之前版本中的IPC通道存在输入验证错误漏洞，该漏洞源于程序没有充分验证用户提交的输入。本地攻击者可通过发送特制的IPC消息利用该漏洞造成拒绝服务。
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 AnyConnect Secure Mobility Client | n/a | - |
II. Public POCs for CVE-2020-3434
| # | POC Description | Source Link | Shenlong Link |
|---|
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- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-anyconnect-dos-feXq4tAVvendor-advisoryx_refsource_CISCO
- https://nvd.nist.gov/vuln/detail/CVE-2020-3434
Same Patch Batch · Cisco · 2020-08-17 · 17 CVEs total
| CVE-2020-3433 | 7.8 HIGH | Cisco AnyConnect Secure Mobility Client for Windows DLL Hijacking Vulnerability |
| CVE-2020-3500 | 6.8 MEDIUM | Cisco StarOS IPv6 Denial of Service Vulnerability |
| CVE-2020-3463 | 6.1 MEDIUM | Cisco Webex Meetings Reflected Cross-Site Scripting Vulnerability |
| CVE-2020-3346 | 6.1 MEDIUM | Cisco Unified Communications Manager Cross-Site Scripting Vulnerability |
| CVE-2020-3447 | 5.5 MEDIUM | Cisco Email Security Appliance and Cisco Content Security Management Appliance Information |
| CVE-2020-3435 | 5.5 MEDIUM | Cisco AnyConnect Secure Mobility Client for Windows Profile Modification Vulnerability |
| CVE-2020-3472 | 5.0 MEDIUM | Cisco Webex Meetings User Email Address Information Disclosure Vulnerability |
| CVE-2020-3464 | 4.8 MEDIUM | Cisco UCS Director Stored Cross-Site Scripting Vulnerability |
| CVE-2020-3449 | 4.3 MEDIUM | Cisco IOS XR Software Additional Paths Denial of Service Vulnerability |
| CVE-2020-3413 | 4.3 MEDIUM | Cisco Webex Meetings Scheduled Meeting Template Deletion Vulnerability |
| CVE-2020-3412 | 4.3 MEDIUM | Cisco Webex Meetings Scheduled Meeting Template Creation Vulnerability |
| CVE-2020-3502 | 4.1 MEDIUM | Cisco Webex Meetings Desktop App Information Disclosure Vulnerabilities |
| CVE-2020-3501 | 4.1 MEDIUM | Cisco Webex Meetings Desktop App Information Disclosure Vulnerabilities |
| CVE-2020-3448 | Cisco Cyber Vision Center Software Access Control Bypass Vulnerability | |
| CVE-2020-3411 | Cisco DNA Center Information Disclosure Vulnerability | |
| CVE-2020-3363 | Cisco Small Business Smart and Managed Switches Denial of Service Vulnerability |
IV. Related Vulnerabilities
Same product: Cisco AnyConnect Secure Mobility Client
- CVE-2021-40124
Cisco AnyConnect Secure Mobility Client for Windows with Net - CVE-2021-34788
Cisco AnyConnect Secure Mobility Client for Linux and Mac OS - CVE-2021-1567
Cisco AnyConnect Secure Mobility Client for Windows with VPN - CVE-2021-1568
Cisco AnyConnect Secure Mobility Client for Windows Denial o - CVE-2021-1519
Cisco AnyConnect Secure Mobility Client Profile Modification
Same vendor: Cisco
- CVE-2026-20219
Cisco Slido 安全漏洞 - CVE-2026-20034
Cisco Unity Connection Remote Code Execution Vulnerability - CVE-2026-20035
Cisco Unity Connection Server-Side Request Forgery Vulnerabi - CVE-2026-20167
Cisco IoT Field Network Director Remote Device Denial of Ser - CVE-2026-20169
Cisco IoT Field Network Director Command Injection Vulnerabi
Same weakness: CWE-20
V. Comments for CVE-2020-3434
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