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CVE-2019-1691— Cisco Firepower Threat Defense Software SSL or TLS Denial of Service 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 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 FTD中的检测引擎存在输入验证漏洞。远程攻击者可通过发送特制的SSL或TLS数据包利用该漏洞重启SNORT检测器，造成拒绝服务。

AI Predicted 7.5 Difficulty: Easy EPSS 2.27% · P82

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2019-1691

Vulnerability Information
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Vulnerability Title
Cisco Firepower Threat Defense Software SSL or TLS Denial of Service Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the detection engine of Cisco Firepower Threat Defense Software could allow an unauthenticated, remote attacker to cause the unexpected restart of the SNORT detection engine, resulting in a denial of service (DoS) condition. The vulnerability is due to the incomplete error handling of the SSL or TLS packet header during the connection establishment. An attacker could exploit this vulnerability by sending a crafted SSL or TLS packet during the connection handshake. An exploit could allow the attacker to cause the SNORT detection engine to unexpectedly restart, resulting in a partial DoS condition while the detection engine restarts. Versions prior to 6.2.3.4 are affected.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco Firepower Threat Defense 输入验证错误漏洞
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 FTD中的检测引擎存在输入验证漏洞。远程攻击者可通过发送特制的SSL或TLS数据包利用该漏洞重启SNORT检测器，造成拒绝服务。
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 Firepower Threat Defense Software unspecified ~ 6.2.3.4 -

II. Public POCs for CVE-2019-1691

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III. Intelligence Information for CVE-2019-1691

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Vendor Advisories for CVE-2019-1691 (2)

Same Patch Batch · Cisco · 2019-02-21 · 12 CVEs total

CVE-2019-1659 Cisco Prime Infrastructure Certificate Validation Vulnerability
CVE-2019-1662 Cisco Prime Collaboration Assurance Software Unauthenticated Access Vulnerability
CVE-2019-1664 Cisco HyperFlex Software Unauthenticated Root Access Vulnerability
CVE-2019-1665 Cisco Hyperflex Stored Cross-Site Scripting Vulnerability
CVE-2019-1666 Cisco HyperFlex Unauthenticated Statistics Retrieval Vulnerability
CVE-2019-1667 Cisco HyperFlex Arbitrary Statistics Write Vulnerability
CVE-2019-1681 Cisco Network Convergence System 1000 Series TFTP Directory Traversal Vulnerability
CVE-2019-1684 Cisco IP Phone 7800 and 8800 Series Cisco Discovery Protocol and Link Layer Discovery Prot
CVE-2019-1685 Cisco Unity Connection Reflected Cross-Site Scripting Vulnerability
CVE-2019-1698 Cisco IoT Field Network Director XML External Entity Vulnerability
CVE-2019-1700 Cisco Firepower 9000 Series Firepower 2-Port 100G Double-Width Network Module Queue Wedge

IV. Related Vulnerabilities

Same product: Cisco Firepower Threat Defense Software
Same vendor: Cisco
Same weakness: CWE-20

V. Comments for CVE-2019-1691

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