Cisco Firepower Threat Defense Software Stream Reassembly Bypass Vulnerability

Published 7 y ago 2019-11-05 · modified 2 mo ago 2026-08-11 · JSON

CVSS

5.8

v3.0 · CNA

CISA KEV

not known exploited

EPSS

9.4%

percentile 95%

Public exploits

Exploit-DB

A vulnerability in the stream reassembly component of Cisco Firepower Threat Defense Software, Cisco FirePOWER Services Software for ASA, and Cisco Firepower Management Center Software could allow an unauthenticated, remote attacker to bypass filtering protections. The vulnerability is due to improper reassembly of traffic streams. An attacker could exploit this vulnerability by sending crafted streams through an affected device. An exploit could allow the attacker to bypass filtering and deliver malicious requests to protected systems that would otherwise be blocked.

CISA SSVC assessment

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 23 mo ago 2024-11-19

Exploit prediction (EPSS)

9.38% probability of exploitation in the next 30 days, higher than 95% of all scored CVEs.

Exploits and detections

EDB-47902 Citrix Application Delivery Controller and Citrix Gateway - Remote Code Execution · webapps · 2020-01-11

CVSS scores

Assigned by	Version	Score	Vector
CNA	3.0	5.8	`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N`
NVD	3.1	5.8	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N`
CNA	3.0	5.8	`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N`
NVD	2.0	5.0	`AV:N/AC:L/Au:N/C:N/I:P/A:N`

Affected products

Cisco Cisco Firepower Threat Defense Software

Classification

Weakness

CWE-264 Permissions, Privileges, and Access Controls
CWE-20 Improper Input Validation

References

tools.cisco.com /security/center/content/CiscoSecurityAdvisory/cisco-sa-20190816-ftd-srb · vendor-advisory, x_refsource_CISCO, x_transferred

Sources

CVE List: CVE-2019-1978
NVD: CVE-2019-1978

vulnwire keeps one entry per vulnerability: the CVE id wins, then GHSA; records that alias each other are merged. Machine-readable: JSON.

Summary