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CVE-2021-1236— Multiple Cisco Products Snort Application Detection Engine Policy Bypass Vulnerability

Quick assessment

Affected
Cisco Cisco Firepower Threat Defense Software
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 RV110W等都是美国思科（Cisco）公司的一款路由器。 Cisco 多款产品存在安全漏洞，该漏洞源于检测算法中的一个缺陷。攻击者可利用该漏洞绕过配置的策略。以下产品及版本受到影响：Cisco RV110W,Cisco RV130,Cisco RV130W,Cisco RV215W。

AI Predicted 9.8 Difficulty: Easy EPSS 2.15% · P80

Possible ATT&CK Techniques 1 AI

T1562.001
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I. Basic Information for CVE-2021-1236

Vulnerability Information
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Vulnerability Title
Multiple Cisco Products Snort Application Detection Engine Policy Bypass Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Multiple Cisco products are affected by a vulnerability in the Snort application detection engine that could allow an unauthenticated, remote attacker to bypass the configured policies on an affected system. The vulnerability is due to a flaw in the detection algorithm. An attacker could exploit this vulnerability by sending crafted packets that would flow through an affected system. A successful exploit could allow the attacker to bypass the configured policies and deliver a malicious payload to the protected network.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
控制流实现总是不正确
Source: CVE Program / CVE List V5
Vulnerability Title
多款Cisco产品 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco RV110W等都是美国思科（Cisco）公司的一款路由器。 Cisco 多款产品存在安全漏洞，该漏洞源于检测算法中的一个缺陷。攻击者可利用该漏洞绕过配置的策略。以下产品及版本受到影响：Cisco RV110W,Cisco RV130,Cisco RV130W,Cisco RV215W。
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 Firepower Threat Defense Software n/a -

II. Public POCs for CVE-2021-1236

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III. Intelligence Information for CVE-2021-1236

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Vendor Advisories for CVE-2021-1236 (1)

Mailing List Discussions for CVE-2021-1236 (1)

Same Patch Batch · Cisco · 2021-01-13 · 96 CVEs total

CVE-2021-1144 8.8 HIGH Cisco Connected Mobile Experiences Privilege Escalation Vulnerability
CVE-2021-1237 7.8 HIGH Cisco AnyConnect Secure Mobility Client for Windows DLL Injection Vulnerability
CVE-2021-1188 7.2 HIGH Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Remote
CVE-2021-1186 7.2 HIGH Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Remote
CVE-2021-1187 7.2 HIGH Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Remote
CVE-2021-1360 7.2 HIGH Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Remote
CVE-2021-1193 7.2 HIGH Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Remote
CVE-2021-1194 7.2 HIGH Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Remote
CVE-2021-1195 7.2 HIGH Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Remote
CVE-2021-1196 7.2 HIGH Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Remote
CVE-2021-1192 7.2 HIGH Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Remote
CVE-2021-1185 7.2 HIGH Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Remote
CVE-2021-1184 7.2 HIGH Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Remote
CVE-2021-1183 7.2 HIGH Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Remote
CVE-2021-1182 7.2 HIGH Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Remote
CVE-2021-1181 7.2 HIGH Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Remote
CVE-2021-1180 7.2 HIGH Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Remote
CVE-2021-1179 7.2 HIGH Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Remote
CVE-2021-1178 7.2 HIGH Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Remote
CVE-2021-1177 7.2 HIGH Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Remote

Showing top 20 of 96 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Cisco Firepower Threat Defense Software
Same vendor: Cisco
Same weakness: CWE-670

V. Comments for CVE-2021-1236

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