Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2021-40117— Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software SSL/TLS Denial of Service Vulnerability

Quick assessment

Affected
Cisco Cisco Adaptive Security Appliance (ASA) 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 Firepower Threat Defense（FTD）是美国思科（Cisco）公司的一套提供下一代防火墙服务的统一软件。 Cisco Firepower Threat Defense（FTD）和Cisco Adaptive Security Appliances Software（ASA Software） SSL/TLS Denial存在资源管理错误漏洞，该漏洞源于传入的 SSL/TLS 数据包未得到正确处理。攻击者可以通过向受影响的设备发送精心制作的 SSL/TLS 数据包来利用此漏洞

CVSS 8.6 · High EPSS 1.53% · P74

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2021-40117

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software SSL/TLS Denial of Service Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in SSL/TLS message handler for Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability exists because incoming SSL/TLS packets are not properly processed. An attacker could exploit this vulnerability by sending a crafted SSL/TLS packet to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/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 Firepower Threat Defense 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco Firepower Threat Defense（FTD）是美国思科（Cisco）公司的一套提供下一代防火墙服务的统一软件。 Cisco Firepower Threat Defense（FTD）和Cisco Adaptive Security Appliances Software（ASA Software） SSL/TLS Denial存在资源管理错误漏洞，该漏洞源于传入的 SSL/TLS 数据包未得到正确处理。攻击者可以通过向受影响的设备发送精心制作的 SSL/TLS 数据包来利用此漏洞
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 Adaptive Security Appliance (ASA) Software n/a -

II. Public POCs for CVE-2021-40117

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2021-40117

请登录查看更多情报信息。

Vendor Advisories for CVE-2021-40117 (1)

Same Patch Batch · Cisco · 2021-10-27 · 20 CVEs total

CVE-2021-40116 8.6 HIGH Multiple Cisco Products Snort Rule Denial of Service Vulnerability
CVE-2021-34781 8.6 HIGH Cisco Firepower Threat Defense Software SSH Connections Denial of Service Vulnerability
CVE-2021-34783 8.6 HIGH Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Software-
CVE-2021-34792 8.6 HIGH Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Resource
CVE-2021-34793 8.6 HIGH Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Transpare
CVE-2021-40118 8.6 HIGH Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Servi
CVE-2021-34762 8.1 HIGH Cisco Firepower Management Center Software Authenticated Directory Traversal Vulnerability
CVE-2021-40114 6.8 MEDIUM Multiple Cisco Products Snort Memory Leak Denial of Service Vulnerability
CVE-2021-34756 6.7 MEDIUM Cisco Firepower Threat Defense Software Command Injection Vulnerabilities
CVE-2021-34755 6.7 MEDIUM Cisco Firepower Threat Defense Software Command Injection Vulnerabilities
CVE-2021-34754 5.8 MEDIUM Cisco Firepower Threat Defense Software Ethernet Industrial Protocol Policy Bypass Vulnera
CVE-2021-34794 5.3 MEDIUM Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software SNMP Acce
CVE-2021-34787 5.3 MEDIUM Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Identity-
CVE-2021-40125 5.3 MEDIUM Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software IKEv2 Sit
CVE-2021-34764 4.8 MEDIUM Cisco Firepower Management Center Software Cross-Site Scripting and Open Redirect Vulnerab
CVE-2021-34763 4.8 MEDIUM Cisco Firepower Management Center Software Cross-Site Scripting and Open Redirect Vulnerab
CVE-2021-34791 4.7 MEDIUM Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Applicati
CVE-2021-34790 4.7 MEDIUM Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Applicati
CVE-2021-34761 4.4 MEDIUM Cisco Firepower Threat Defense Software CLI Arbitrary File Write Vulnerability

IV. Related Vulnerabilities

Same product: Cisco Adaptive Security Appliance (ASA) Software
Same vendor: Cisco
Same weakness: CWE-119

V. Comments for CVE-2021-40117

No comments yet

Leave a comment