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CVE-2020-27124— Cisco Adaptive Security Appliance 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 ASA是美国思科（Cisco）公司的一系列应用于企业安全的防火墙。 Cisco ASA Software 存在安全漏洞，攻击者可利用该漏洞触发致命错误，以触发拒绝服务。

CVSS 8.6 · High EPSS 0.88% · P56
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I. Basic Information for CVE-2020-27124

Vulnerability Information
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Vulnerability Title
Cisco Adaptive Security Appliance Software SSL/TLS Denial of Service Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the SSL/TLS handler of Cisco Adaptive Security Appliance (ASA) Software could allow an unauthenticated, remote attacker to cause the affected device to reload unexpectedly, leading to a denial of service (DoS) condition. The vulnerability is due to improper error handling on established SSL/TLS connections. An attacker could exploit this vulnerability by establishing an SSL/TLS connection with the affected device and then sending a malicious SSL/TLS message within that connection. A successful exploit could allow the attacker to cause the device to reload.Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
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
使用未经初始化的变量
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco ASA Software 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco ASA是美国思科（Cisco）公司的一系列应用于企业安全的防火墙。 Cisco ASA Software 存在安全漏洞，攻击者可利用该漏洞触发致命错误，以触发拒绝服务。
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-2020-27124

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III. Intelligence Information for CVE-2020-27124

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Vendor Advisories for CVE-2020-27124 (3)

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

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-2021-1379 6.5 MEDIUM Cisco IP Phones Cisco Discovery Protocol and Link Layer Discovery Protocol Remote Code Exe
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-2020-3548 5.3 MEDIUM Cisco Email Security Appliance Denial Of Service Vulnerability
CVE-2021-1424 5.3 MEDIUM Cisco ASR 5000 Series Software (StarOS) ipsecmgr Process Denial of Service Vulnerability
CVE-2021-1132 5.3 MEDIUM Cisco Network Services Orchestrator Path Traversal Vulnerability
CVE-2021-1234 5.3 MEDIUM Cisco SD-WAN vManage Information Disclosure Vulnerabilities
CVE-2020-26062 5.3 MEDIUM Cisco Integrated Management Controller Username Enumeration 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-2021-1410 4.3 MEDIUM Cisco Webex Meetings Unauthorized Distribution List Update Vulnerability
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 Adaptive Security Appliance (ASA) Software
Same vendor: Cisco
Same weakness: CWE-457

V. Comments for CVE-2020-27124

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