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CVE-2020-3556— Cisco AnyConnect Secure Mobility Client Arbitrary Code Execution Vulnerability

Quick assessment

Affected
Cisco Cisco AnyConnect Secure Mobility Client
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 Anyconnect Secure Mobility Client是美国思科（Cisco）公司的一款用于安全连接的VPN客户端软件。 Cisco AnyConnect Secure Mobility Client IPC存在输入验证错误漏洞，该漏洞允许攻击者在受影响系统上运行代码。

CVSS 7.3 · High EPSS 0.45% · P37
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I. Basic Information for CVE-2020-3556

Vulnerability Information
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Vulnerability Title
Cisco AnyConnect Secure Mobility Client Arbitrary Code Execution Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the interprocess communication (IPC) channel of Cisco AnyConnect Secure Mobility Client Software could allow an authenticated, local attacker to cause a targeted AnyConnect user to execute a malicious script. The vulnerability is due to a lack of authentication to the IPC listener. An attacker could exploit this vulnerability by sending crafted IPC messages to the AnyConnect client IPC listener. A successful exploit could allow an attacker to cause the targeted AnyConnect user to execute a script. This script would execute with the privileges of the targeted AnyConnect user. In order to successfully exploit this vulnerability, there must be an ongoing AnyConnect session by the targeted user at the time of the attack. To exploit this vulnerability, the attacker would also need valid user credentials on the system upon which the AnyConnect client is being run. Cisco has not released software updates that address this vulnerability.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
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是美国思科（Cisco）公司的一款用于安全连接的VPN客户端软件。 Cisco AnyConnect Secure Mobility Client IPC存在输入验证错误漏洞，该漏洞允许攻击者在受影响系统上运行代码。
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)

Affected Products

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

II. Public POCs for CVE-2020-3556

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III. Intelligence Information for CVE-2020-3556

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Vendor Advisories for CVE-2020-3556 (1)

Same Patch Batch · Cisco · 2020-11-06 · 27 CVEs total

CVE-2020-3603 7.8 HIGH Cisco Webex Network Recording Player and Cisco Webex Player Arbitrary Code Execution Vulne
CVE-2020-3573 7.8 HIGH Cisco Webex Network Recording Player and Cisco Webex Player Arbitrary Code Execution Vulne
CVE-2020-3593 7.8 HIGH Cisco SD-WAN Software Privilege Escalation Vulnerability
CVE-2020-3594 7.8 HIGH Cisco SD-WAN Software Privilege Escalation Vulnerability
CVE-2020-3600 7.8 HIGH Cisco SD-WAN Software Privilege Escalation Vulnerability
CVE-2020-3595 7.8 HIGH Cisco SD-WAN Software Privilege Escalation Vulnerability
CVE-2020-3604 7.8 HIGH Cisco Webex Network Recording Player and Cisco Webex Player Arbitrary Code Execution Vulne
CVE-2020-3574 7.5 HIGH Cisco IP Phone TCP Packet Flood Denial of Service Vulnerability
CVE-2020-3588 7.3 HIGH Cisco Webex Meetings Desktop App Arbitrary Code Execution Vulnerability
CVE-2020-27129 6.7 MEDIUM Cisco SD-WAN vManage Software Command Injection Vulnerability
CVE-2020-3592 6.5 MEDIUM Cisco SD-WAN vManage Software Authorization Bypass Vulnerability
CVE-2020-26084 6.5 MEDIUM Cisco Edge Fog Fabric Resource Exposure Vulnerability
CVE-2020-27128 6.5 MEDIUM Cisco SD-WAN vManage Software Arbitrary File Creation Vulnerability
CVE-2020-3590 6.4 MEDIUM Cisco SD-WAN vManage Software Cross-Site Scripting Vulnerability
CVE-2020-3587 6.4 MEDIUM Cisco SD-WAN vManage Software Cross-Site Scripting Vulnerability
CVE-2020-3371 6.3 MEDIUM Cisco Integrated Management Controller Command Injection Vulnerability
CVE-2020-3551 6.1 MEDIUM Cisco Identity Services Engine Cross-Site Scripting Vulnerability
CVE-2020-27123 5.5 MEDIUM Cisco AnyConnect Secure Mobility Client for Windows Arbitrary File Read Vulnerability
CVE-2020-26083 4.8 MEDIUM Cisco Identity Services Engine Cross-Site Scripting Vulnerability
CVE-2020-27121 4.3 MEDIUM Cisco Unified Communications Manager IM and Presence Service Denial of Service Vulnerabili

Showing top 20 of 27 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Cisco AnyConnect Secure Mobility Client
Same vendor: Cisco
Same weakness: CWE-20

V. Comments for CVE-2020-3556

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