Is CVE-2019-1687 in the CISA KEV catalog?

No. CVE-2019-1687 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2019-1687?

CVE-2019-1687 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2019-1687?

CVE-2019-1687 has an EPSS score of 2.90% (85th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2019-1687?

Upgrade adaptive security appliance software to 9.10.1.17 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2019-1687

HIGHEPSS 85th pctl

7.5

CVSS v3

NVD

Description

A vulnerability in the TCP proxy functionality for Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the device to restart unexpectedly, resulting in a denial of service (DoS) condition. The vulnerability is due to an error in TCP-based packet inspection, which could cause the TCP packet to have an invalid Layer 2 (L2)-formatted header. An attacker could exploit this vulnerability by sending a crafted TCP packet sequence to the targeted device. A successful exploit could allow the attacker to cause a DoS condition.

CWE-20Improper Input Validation

How to fix

Remediation Available

adaptive security appliance softwareNVD

Affected:>= 9.10, < 9.10.1.17Fixed in:9.10.1.17CVE-2019-1687derived from NVD

Affected:< 9.4.4.34Fixed in:9.4.4.34CVE-2019-1687derived from NVD

firepower threat defenseNVD

Affected:>= 6.3.0, < 6.3.0.3Fixed in:6.3.0.3CVE-2019-1687derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

2.90%probability of exploitation in 30 days

85thpercentile

Elevated risk: more likely to be exploited than 85% of all known CVEs.

References

Vendor Advisory1

tools.cisco.com

Third-Party Advisory1

securityfocus.com

Related Vulnerabilities

Other CWE-20 (Improper Input Validation) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-3400	Critical	10.0	100%	KEV + Ransom	-
CVE-2021-45105	Medium	5.9	100%	-	Fix
CVE-2021-44228	Critical	10.0	100%	KEV + Ransom	Fix
CVE-2021-21985	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2018-7600	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2020-3452	High	7.5	100%	KEV	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.