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CVE-2021-1379— Cisco IP Phones Cisco Discovery Protocol and Link Layer Discovery Protocol Remote Code Execution and Denial of Service Vulnerabilities

Quick assessment

Affected
Cisco Cisco IP Phones with Multiplatform Firmware
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 IP Phone是美国思科（Cisco）公司的一个硬件设备。提供通话功能的IP电话。 Cisco IP Phone 存在安全漏洞，攻击者可利用此漏洞可能允许恶意用户在受影响的设备上执行代码或导致其意外重新加载。

CVSS 6.5 · Medium EPSS 0.33% · P24

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-1379

Vulnerability Information
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Vulnerability Title
Cisco IP Phones Cisco Discovery Protocol and Link Layer Discovery Protocol Remote Code Execution and Denial of Service Vulnerabilities
Source: CVE Program / CVE List V5
Vulnerability Description
Multiple vulnerabilities in the Cisco Discovery Protocol and Link Layer Discovery Protocol (LLDP) implementations for Cisco IP Phone Series 68xx/78xx/88xx could allow an unauthenticated, adjacent attacker to execute code remotely or cause a reload of an affected IP phone. These vulnerabilities are due to missing checks when the IP phone processes a Cisco Discovery Protocol or LLDP packet. An attacker could exploit these vulnerabilities by sending a malicious Cisco Discovery Protocol or LLDP packet to the targeted IP phone. A successful exploit could allow the attacker to execute code on the affected IP phone or cause it to reload unexpectedly, resulting in a denial of service (DoS) condition.Note: Cisco Discovery Protocol is a Layer 2 protocol. To exploit these vulnerabilities, an attacker must be in the same broadcast domain as the affected device (Layer 2 adjacent).Cisco has released software updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未进行输入大小检查的缓冲区拷贝(传统缓冲区溢出)
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco IP Phone 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco IP Phone是美国思科（Cisco）公司的一个硬件设备。提供通话功能的IP电话。 Cisco IP Phone 存在安全漏洞，攻击者可利用此漏洞可能允许恶意用户在受影响的设备上执行代码或导致其意外重新加载。
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 IP Phones with Multiplatform Firmware 11.1.2 -
Cisco Cisco Session Initiation Protocol (SIP) Software 9.0(3) -
Cisco Cisco Small Business IP Phones 7.4.8 -

II. Public POCs for CVE-2021-1379

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III. Intelligence Information for CVE-2021-1379

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Vendor Advisories for CVE-2021-1379 (2)

Same Patch Batch · Cisco · 2024-11-18 · 28 CVEs total

CVE-2020-27124 8.6 HIGH Cisco Adaptive Security Appliance Software SSL/TLS Denial of Service Vulnerability
CVE-2020-26071 8.4 HIGH Cisco SD-WAN vEdge Arbitrary File Creation Vulnerability
CVE-2020-26074 7.8 HIGH Cisco SD-WAN vManage Privilege Escalation Vulnerability
CVE-2020-26073 7.5 HIGH Cisco SD-WAN vManage Directory Traversal Vulnerability
CVE-2021-1440 6.8 MEDIUM Cisco IOS XR Software BGP Resource Public Key Infrastructure Denial of Service Vulnerabili
CVE-2021-1232 6.5 MEDIUM Cisco SD-WAN vManage Information Disclosure Vulnerability
CVE-2020-3539 6.3 MEDIUM Cisco Data Center Network Manager Authorization Bypass Vulnerability
CVE-2021-1444 6.1 MEDIUM Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD)
CVE-2020-3431 6.1 MEDIUM Cisco Small Business RV Series Routers Cross-Site Scripting Vulnerability
CVE-2020-26067 5.4 MEDIUM Cisco Webex Teams Web Interface Cross-Site Scripting Vulnerability
CVE-2020-26063 5.4 MEDIUM Cisco Integrated Management Controller Software Authorization Bypass Vulnerability
CVE-2020-26062 5.3 MEDIUM Cisco Integrated Management Controller Username Enumeration Vulnerability
CVE-2020-3548 5.3 MEDIUM Cisco Email Security Appliance Denial Of Service Vulnerability
CVE-2021-1234 5.3 MEDIUM Cisco SD-WAN vManage Information Disclosure Vulnerabilities
CVE-2021-1132 5.3 MEDIUM Cisco Network Services Orchestrator Path Traversal Vulnerability
CVE-2021-1424 5.3 MEDIUM Cisco ASR 5000 Series Software (StarOS) ipsecmgr Process Denial of Service Vulnerability
CVE-2021-1461 4.9 MEDIUM Cisco SD-WAN Software Signature Verification Bypass Vulnerability
CVE-2020-3538 4.6 MEDIUM Cisco Data Center Network Manager Path Traversal Vulnerability
CVE-2021-1465 4.3 MEDIUM Cisco?SD-WAN vManage Software 输入验证错误漏洞
CVE-2021-1425 4.3 MEDIUM Cisco Cisco Email Security Appliance and Content Security Management Appliance Informatio

Showing top 20 of 28 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Cisco IP Phones with Multiplatform Firmware
Same vendor: Cisco
Same weakness: CWE-120

V. Comments for CVE-2021-1379

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