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CVE-2020-3433— Cisco AnyConnect Secure Mobility Client for Windows DLL Hijacking Vulnerability

Quick assessment

Affected
Cisco Cisco AnyConnect Secure Mobility Client
Exploitation
Confirmed exploitation in the wild; remediate immediately
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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。 Cisco AnyConnect Secure Mobility Client for Windows 4.9.00086之前版本中的IPC通道存在代码问题漏洞，该漏洞源于程序充分验证所加载的资源。本地攻击者可通过发送特制的IPC消息利用该漏洞以SYSTEM权限执行任意代码。

CVSS 7.8 · High KEV · Ransomware EPSS 10.05% · P95

Public Exploits 1

Metasploit · 1 anyconnect_lpe.rb#CVE-2020-3433 [exploit]

Affected Version Matrix 1

VendorProduct Version RangeStatus
Cisco Cisco AnyConnect Secure Mobility Client n/a affected
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I. Basic Information for CVE-2020-3433

Vulnerability Information
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Vulnerability Title
Cisco AnyConnect Secure Mobility Client for Windows DLL Hijacking Vulnerability
Source: CVE Program / CVE List V5
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 perform a DLL hijacking attack. To exploit this vulnerability, the attacker would need to have valid credentials on the Windows system. The vulnerability is due to insufficient validation of resources that are loaded by the application at run time. An attacker could exploit this vulnerability by sending a crafted IPC message to the AnyConnect process. A successful exploit could allow the attacker to execute arbitrary code on the affected machine with SYSTEM privileges. To exploit this vulnerability, the attacker would need to have valid credentials on the Windows system.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对搜索路径元素未加控制
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco AnyConnect Secure Mobility Client for Windows 代码问题漏洞
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。 Cisco AnyConnect Secure Mobility Client for Windows 4.9.00086之前版本中的IPC通道存在代码问题漏洞，该漏洞源于程序充分验证所加载的资源。本地攻击者可通过发送特制的IPC消息利用该漏洞以SYSTEM权限执行任意代码。
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)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
Cisco Cisco AnyConnect Secure Mobility Client n/a -

II. Public POCs for CVE-2020-3433

# POC Description Source Link Shenlong Link
1 PoCs and technical analysis of three vulnerabilities found on Cisco AnyConnect for Windows: CVE-2020-3433, CVE-2020-3434 and CVE-2020-3435 https://github.com/goichot/CVE-2020-3433 POC Details
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III. Intelligence Information for CVE-2020-3433

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Vendor Advisories for CVE-2020-3433 (1)

Exploits & Public PoCs for CVE-2020-3433 (1)

Same Patch Batch · Cisco · 2020-08-17 · 17 CVEs total

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-2020-3434 5.5 MEDIUM Cisco AnyConnect Secure Mobility Client for Windows Denial of Service 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
Same vendor: Cisco
Same weakness: CWE-427

V. Comments for CVE-2020-3433

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