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CVE-2020-3204— Cisco IOS and IOS XE Software Tcl Arbitrary Code Execution Vulnerability

Quick assessment

Affected
Cisco Cisco IOS 12.2(53)SE1
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 IOS和IOS XE都是美国思科（Cisco）公司的一套为其网络设备开发的操作系统。 Cisco IOS和IOS XE中的Tool Command Language (Tcl)解析器存在输入验证错误漏洞，该漏洞源于缺乏对输入数据的验证。攻击者可通过在受影响的设备上加载恶意的Tcl代码利用该漏洞导致内存损坏或以root权限执行代码。

AI Predicted 7.8 Difficulty: Easy EPSS 0.38% · P32
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I. Basic Information for CVE-2020-3204

Vulnerability Information
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Vulnerability Title
Cisco IOS and IOS XE Software Tcl Arbitrary Code Execution Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the Tool Command Language (Tcl) interpreter of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, local attacker with privileged EXEC credentials to execute arbitrary code on the underlying operating system (OS) with root privileges. The vulnerability is due to insufficient input validation of data passed to the Tcl interpreter. An attacker could exploit this vulnerability by loading malicious Tcl code on an affected device. A successful exploit could allow the attacker to cause memory corruption or execute the code with root privileges on the underlying OS of the affected device.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco IOS和IOS XE 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco IOS和IOS XE都是美国思科（Cisco）公司的一套为其网络设备开发的操作系统。 Cisco IOS和IOS XE中的Tool Command Language (Tcl)解析器存在输入验证错误漏洞，该漏洞源于缺乏对输入数据的验证。攻击者可通过在受影响的设备上加载恶意的Tcl代码利用该漏洞导致内存损坏或以root权限执行代码。
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 IOS 12.2(53)SE1 n/a -

II. Public POCs for CVE-2020-3204

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III. Intelligence Information for CVE-2020-3204

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Vendor Advisories for CVE-2020-3204 (1)

Same Patch Batch · Cisco · 2020-06-03 · 50 CVEs total

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CVE-2020-3281 Cisco Digital Network Architecture Center Information Disclosure Vulnerability
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CVE-2020-3200 Cisco IOS and IOS XE Software Secure Shell Denial of Service Vulnerability
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CVE-2020-3198 Cisco IOS Software for Cisco Industrial Routers Arbitrary Code Execution Vulnerabilities
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CVE-2020-3231 Cisco IOS Software for Catalyst 2960-L Series Switches and Catalyst CDB-8P Switches 802.1X
CVE-2020-3230 Cisco IOS and IOS XE Software Internet Key Exchange Version 2 Denial of Service Vulnerabil
CVE-2020-3229 Cisco IOS XE Software Web UI Privilege Escalation Vulnerability
CVE-2020-3227 Cisco IOx for IOS XE Software Privilege Escalation Vulnerability
CVE-2020-3225 Cisco IOS and IOS XE Software Common Industrial Protocol Denial of Service Vulnerabilities
CVE-2020-3233 Cisco IOx Application Framework Local Manager Stored Cross-Site Scripting Vulnerability

Showing top 20 of 50 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same vendor: Cisco
Same weakness: CWE-20

V. Comments for CVE-2020-3204

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