Cisco Firepower Threat Defense Software SIP Inspection DoS (cisco-sa-20191002-asa-ftd-sip-dos)

high Nessus Plugin ID 131183


The remote device is missing a vendor-supplied security patch


A denial of service (DoS) vulnerability exists in the Session Initiation Protocol (SIP) inspection module of Cisco Firepower Threat Defense (FTD) due to improper parsing of SIP messages. An unauthenticated, remote attacker can exploit this issue by sending a malicious SIP packet to an affected device which triggers an integer underflow that causes the software to try to read unmapped memory, resulting in a crash.

Please see the included Cisco BIDs and Cisco Security Advisory for more information.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.


Upgrade to the relevant fixed version referenced in Cisco bug ID CSCvp45882

See Also

Plugin Details

Severity: High

ID: 131183

File Name: cisco-sa-20191002-ftd-sip-dos.nasl

Version: 1.4

Type: local

Family: CISCO

Published: 11/21/2019

Updated: 3/25/2020

Risk Information


Risk Factor: Low

Score: 3.6


Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P

Temporal Vector: E:U/RL:OF/RC:C

CVSS Score Source: CVE-2019-12678


Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:cisco:firepower_threat_defense

Required KB Items: installed_sw/Cisco Firepower Threat Defense

Exploit Ease: No known exploits are available

Patch Publication Date: 10/2/2019

Vulnerability Publication Date: 10/2/2019

Reference Information

CVE: CVE-2019-12678


CISCO-SA: cisco-sa-20191002-asa-ftd-sip-dos

IAVA: 2019-A-0370