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CVE-2021-1308— Cisco Small Business RV Series Routers Link Layer Discovery Protocol Vulnerabilities

Quick assessment

Affected
Cisco Cisco Small Business RV Series Router 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 Link Layer Discovery Protocol是美国思科（Cisco）公司的一个路由器。 Cisco Link Layer Discovery Protocol 存在缓冲区错误漏洞，攻击者可利用该漏洞可以执行任意代码，或导致受影响的路由器泄漏系统内存或重新加载。

CVSS 7.4 · High EPSS 0.43% · P35

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-1308

Vulnerability Information
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Vulnerability Title
Cisco Small Business RV Series Routers Link Layer Discovery Protocol Vulnerabilities
Source: CVE Program / CVE List V5
Vulnerability Description
Multiple vulnerabilities exist in the Link Layer Discovery Protocol (LLDP) implementation for Cisco Small Business RV Series Routers. An unauthenticated, adjacent attacker could execute arbitrary code or cause an affected router to leak system memory or reload. A memory leak or device reload would cause a denial of service (DoS) condition on an affected device. For more information about these vulnerabilities, see the Details section of this advisory. Note: LLDP 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).
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/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 Link Layer Discovery Protocol 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco Link Layer Discovery Protocol是美国思科（Cisco）公司的一个路由器。 Cisco Link Layer Discovery Protocol 存在缓冲区错误漏洞，攻击者可利用该漏洞可以执行任意代码，或导致受影响的路由器泄漏系统内存或重新加载。
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 Small Business RV Series Router Firmware n/a -

II. Public POCs for CVE-2021-1308

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III. Intelligence Information for CVE-2021-1308

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Vendor Advisories for CVE-2021-1308 (1)

Same Patch Batch · Cisco · 2021-04-08 · 29 CVEs total

CVE-2021-1459 9.8 CRITICAL Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Remote
CVE-2021-1362 8.8 HIGH Cisco Unified Communications Products Remote Code Execution Vulnerability
CVE-2021-1137 7.8 HIGH Cisco SD-WAN vManage Software Vulnerabilities
CVE-2021-1480 7.8 HIGH Cisco SD-WAN vManage Software Vulnerabilities
CVE-2021-1479 7.8 HIGH Cisco SD-WAN vManage Software Vulnerabilities
CVE-2021-1404 7.5 HIGH Clam AntiVirus (ClamAV) Email Parser Denial of Service Vulnerability
CVE-2021-1405 7.5 HIGH Clam AntiVirus (ClamAV) PDF Parser Denial of Service Vulnerability
CVE-2021-1252 7.5 HIGH Clam AntiVirus (ClamAV) Excel XLM Parser Denial of Service Vulnerability
CVE-2021-1251 7.4 HIGH Cisco Small Business RV Series Routers Link Layer Discovery Protocol Vulnerabilities
CVE-2021-1309 7.4 HIGH Cisco Small Business RV Series Routers Link Layer Discovery Protocol Vulnerabilities
CVE-2021-1386 7.0 HIGH Cisco Advanced Malware Protection for Endpoints Windows Connector, ClamAV for Windows, an
CVE-2021-1485 6.6 MEDIUM Cisco IOS XR Software Command Injection Vulnerability
CVE-2021-1475 6.5 MEDIUM Cisco Umbrella Link and CSV Formula Injection Vulnerabilities
CVE-2021-1474 6.5 MEDIUM Cisco Umbrella Link and CSV Formula Injection Vulnerabilities
CVE-2021-1413 6.3 MEDIUM Cisco RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN Routers Authenticated Remote C
CVE-2021-1414 6.3 MEDIUM Cisco RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN Routers Authenticated Remote C
CVE-2021-1415 6.3 MEDIUM Cisco RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN Routers Authenticated Remote C
CVE-2021-1409 6.1 MEDIUM Cisco Unified Communications Products Cross-Site Scripting Vulnerabilities
CVE-2021-1380 6.1 MEDIUM Cisco Unified Communications Products Cross-Site Scripting Vulnerabilities
CVE-2021-1463 6.1 MEDIUM Cisco Unified Intelligence Center Reflected Cross-Site Scripting Vulnerability

Showing top 20 of 29 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Cisco Small Business RV Series Router Firmware
Same vendor: Cisco
Same weakness: CWE-119

V. Comments for CVE-2021-1308

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