CVE-2017-3793

Description

A vulnerability in the TCP normalizer of Cisco Adaptive Security Appliance (ASA) Software (8.0 through 8.7 and 9.0 through 9.6) and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause Cisco ASA and FTD to drop any further incoming traffic on all interfaces, resulting in a denial of service (DoS) condition. The vulnerability is due to improper limitation of the global out-of-order TCP queue for specific block sizes. An attacker could exploit this vulnerability by sending a large number of unique permitted TCP connections with out-of-order segments. An exploit could allow the attacker to exhaust available blocks in the global out-of-order TCP queue, causing the dropping of any further incoming traffic on all interfaces and resulting in a DoS condition. Cisco Bug IDs: CSCvb46321.

Risk Information

Base Score

4.0

MODERATE

Vector

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:L

EPSS Score

Exploitation Probability

0.407

Associated Vulnerability

Vulnerability	OS Platform
Cisco ASA Software and Cisco FTD Software TCP Normalizer Denial of Service Vulnerability For Cisco Adaptive Security Appliance (ASA) Software	NCM
Uncontrolled Resource Consumption Vulnerability (CVE-2017-3793)	NCM

Patch Details

Click to see the patches provided by ManageEngine for this CVE

Patch ID	Patch Description
PATCH-1706057	Security Update for Cisco Adaptive Security Appliance (ASA) Software 99.17(1.69)

References

https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234