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CVE-2021-1445— Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Services VPN Denial of Service Vulnerabilities

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 Adaptive Security Appliances Software（ASA Software）是美国思科（Cisco）公司的一套防火墙和网络安全平台。该平台提供了对数据和网络资源的高度安全的访问等功能。 Cisco Adaptive Security Appliance (ASA) Software 存在缓冲区错误漏洞，该漏洞源于思科自适应安全设备(ASA)软件和火力威胁防御(FTD)软件VPN接口的边界错误。以下产品及版本受到影响：Cisco Adaptive Security Ap

CVSS 8.6 · High EPSS 1.66% · P76

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2021-1445

Vulnerability Information
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Vulnerability Title
Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Services VPN Denial of Service Vulnerabilities
Source: CVE Program / CVE List V5
Vulnerability Description
Multiple vulnerabilities in Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. These vulnerabilities are due to lack of proper input validation of the HTTPS request. An attacker could exploit these vulnerabilities by sending a crafted HTTPS request to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition. Note: This vulnerability affects only specific AnyConnect and WebVPN configurations. For more information, see the Vulnerable Products section.
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
跨界内存写
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco Adaptive Security Appliances Software 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco Adaptive Security Appliances Software（ASA Software）是美国思科（Cisco）公司的一套防火墙和网络安全平台。该平台提供了对数据和网络资源的高度安全的访问等功能。 Cisco Adaptive Security Appliance (ASA) Software 存在缓冲区错误漏洞，该漏洞源于思科自适应安全设备(ASA)软件和火力威胁防御(FTD)软件VPN接口的边界错误。以下产品及版本受到影响：Cisco Adaptive Security Ap
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-2021-1445

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III. Intelligence Information for CVE-2021-1445

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Vendor Advisories for CVE-2021-1445 (1)

Same Patch Batch · Cisco · 2021-04-29 · 17 CVEs total

CVE-2021-1501 8.6 HIGH Cisco Adaptive Security Appliance Software and Cisco Firepower Threat Defense Software SIP
CVE-2021-1504 8.6 HIGH Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Servi
CVE-2021-1493 8.5 HIGH Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Servi
CVE-2021-1476 6.7 MEDIUM Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Command I
CVE-2021-1488 6.7 MEDIUM Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software for Firep
CVE-2021-1256 6.0 MEDIUM Cisco Firepower Threat Defense Software Command File Overwrite Vulnerability
CVE-2021-1495 5.8 MEDIUM Multiple Cisco Products Snort HTTP Detection Engine File Policy Bypass Vulnerability
CVE-2021-1369 5.4 MEDIUM Cisco Firepower Device Manager On-Box Software XML External Entity Vulnerability
CVE-2021-1456 4.8 MEDIUM Cisco Firepower Management Center Software Cross-Site Scripting Vulnerabilities
CVE-2021-1457 4.8 MEDIUM Cisco Firepower Management Center Software Cross-Site Scripting Vulnerabilities
CVE-2021-1458 4.8 MEDIUM Cisco Firepower Management Center Software Cross-Site Scripting Vulnerabilities
CVE-2021-1477 4.3 MEDIUM Cisco Firepower Management Center Software Policy Vulnerability
CVE-2021-1402 Cisco Firepower Threat Defense Software SSL Decryption Policy Denial of Service Vulnerabil
CVE-2021-1448 Cisco Firepower Threat Defense Software Command Injection Vulnerability
CVE-2021-1455 Cisco Firepower Management Center Software Cross-Site Scripting Vulnerabilities
CVE-2021-1489 Cisco Firepower Device Manager Software Filesystem Space Exhaustion Denial of Service Vuln

IV. Related Vulnerabilities

Same product: Cisco Adaptive Security Appliance (ASA) Software
Same vendor: Cisco
Same weakness: CWE-787

V. Comments for CVE-2021-1445

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