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CVE-2021-1521— Cisco Video Surveillance 8000 Series IP Cameras Cisco Discovery Protocol Denial of Service Vulnerability

Quick assessment

Affected
Cisco Cisco Video Surveillance 8000 Series IP Cameras
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 Video Surveillance 8000 Series IP Cameras是美国思科（Cisco）公司的一款视频监控摄像头。 Cisco Video Surveillance 8000 Series IP Cameras 存在缓冲区错误漏洞，该漏洞源于处理思科发现协议消息时缺少检查。攻击者可利用该漏洞导致受影响的IP摄像机意外重新加载，从而导致拒绝服务(DoS)状态。

CVSS 6.5 · Medium EPSS 0.40% · P32
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I. Basic Information for CVE-2021-1521

Vulnerability Information
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Vulnerability Title
Cisco Video Surveillance 8000 Series IP Cameras Cisco Discovery Protocol Denial of Service Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the Cisco Discovery Protocol implementation for Cisco Video Surveillance 8000 Series IP Cameras could allow an unauthenticated, adjacent attacker to cause an affected IP camera to reload. This vulnerability is due to missing checks when processing Cisco Discovery Protocol messages. An attacker could exploit this vulnerability by sending a malicious Cisco Discovery Protocol packet to an affected IP camera. A successful exploit could allow the attacker to cause the affected IP camera to reload unexpectedly, resulting in a denial of service (DoS) condition. Note: Cisco Discovery Protocol is a Layer 2 protocol. To exploit this vulnerability, an attacker must be in the same broadcast domain as the affected device (Layer 2 adjacent).
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
内存缓冲区边界内操作的限制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco Video Surveillance 8000 Series IP Cameras 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco Video Surveillance 8000 Series IP Cameras是美国思科（Cisco）公司的一款视频监控摄像头。 Cisco Video Surveillance 8000 Series IP Cameras 存在缓冲区错误漏洞，该漏洞源于处理思科发现协议消息时缺少检查。攻击者可利用该漏洞导致受影响的IP摄像机意外重新加载，从而导致拒绝服务(DoS)状态。
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 Video Surveillance 8000 Series IP Cameras n/a -

II. Public POCs for CVE-2021-1521

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III. Intelligence Information for CVE-2021-1521

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Vendor Advisories for CVE-2021-1521 (1)

Same Patch Batch · Cisco · 2021-05-06 · 41 CVEs total

CVE-2021-1508 9.8 CRITICAL Cisco SD-WAN vManage Software Vulnerabilities
CVE-2021-1506 9.8 CRITICAL Cisco SD-WAN vManage Software Vulnerabilities
CVE-2021-1505 9.8 CRITICAL Cisco SD-WAN vManage Software Vulnerabilities
CVE-2021-1275 9.8 CRITICAL Cisco SD-WAN vManage Software Vulnerabilities
CVE-2021-1468 9.8 CRITICAL Cisco SD-WAN vManage Software Vulnerabilities
CVE-2021-1498 9.8 CRITICAL Cisco HyperFlex HX Command Injection Vulnerabilities
CVE-2021-1497 9.8 CRITICAL Cisco HyperFlex HX Command Injection Vulnerabilities
CVE-2021-1284 8.8 HIGH Cisco SD-WAN vManage Software Authentication Bypass Vulnerability
CVE-2021-1401 8.8 HIGH Cisco Small Business 100, 300, and 500 Series Wireless Access Points Vulnerabilities
CVE-2021-1400 8.8 HIGH Cisco Small Business 100, 300, and 500 Series Wireless Access Points Vulnerabilities
CVE-2021-1421 7.8 HIGH Cisco Enterprise NFV Infrastructure Software Command Injection Vulnerability
CVE-2021-1513 7.5 HIGH Cisco SD-WAN Software vDaemon Denial of Service Vulnerability
CVE-2021-1509 7.5 HIGH Cisco SD-WAN vEdge Software Buffer Overflow Vulnerabilities
CVE-2021-1510 7.5 HIGH Cisco SD-WAN vEdge Software Buffer Overflow Vulnerabilities
CVE-2021-1511 7.5 HIGH Cisco SD-WAN vEdge Software Buffer Overflow Vulnerabilities
CVE-2021-1365 7.1 HIGH Cisco Unified Communications Manager IM & Presence Service SQL Injection Vulnerabilities
CVE-2021-1363 7.1 HIGH Cisco Unified Communications Manager IM & Presence Service SQL Injection Vulnerabilities
CVE-2021-1426 7.0 HIGH Cisco AnyConnect Secure Mobility Client for Windows DLL and Executable Hijacking Vulnerabi
CVE-2021-1427 7.0 HIGH Cisco AnyConnect Secure Mobility Client for Windows DLL and Executable Hijacking Vulnerabi
CVE-2021-1430 7.0 HIGH Cisco AnyConnect Secure Mobility Client for Windows DLL and Executable Hijacking Vulnerabi

Showing top 20 of 41 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Cisco Video Surveillance 8000 Series IP Cameras
Same vendor: Cisco
Same weakness: CWE-119

V. Comments for CVE-2021-1521

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