Detections
Analytics
Cisco IOS XE Software Network-Based Application Recognition Denial of Service Vulnerabilities
high Nessus Plugin ID 123794
Language:
Synopsis
The remote device is missing a vendor-supplied security patchDescription
According to its self-reported version, Cisco IOS XE Software is affected by following multiple vulnerabilities- Multiple vulnerabilities in the Network-Based Application Recognition (NBAR) feature of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload.These vulnerabilities are due to a parsing issue on DNS packets. An attacker could exploit these vulnerabilities by sending crafted DNS packets through routers that are running an affected version and have NBAR enabled. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a denial of service (DoS) condition.
(CVE-2019-1738, CVE-2019-1739, CVE-2019-1740)
Please see the included Cisco BIDs and Cisco Security Advisory for more information
Solution
Upgrade to the relevant fixed version referenced in Cisco bug IDs CSCvb51688, CSCvb51688, CSCvb51688See Also
http://www.nessus.org/u?7b838dda
http://tools.cisco.com/security/center/viewErp.x?alertId=ERP-71135
Plugin Details
Severity: High
ID: 123794
File Name: cisco-sa-20190327-nbar.nasl
Version: 1.13
Type: combined
Family: CISCO
Published: 4/5/2019
Updated: 5/3/2024
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.4
CVSS v2
Risk Factor: High
Base Score: 7.8
Temporal Score: 5.8
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C
CVSS Score Source: CVE-2019-1740
CVSS v3
Risk Factor: High
Base Score: 8.6
Temporal Score: 7.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
CPE: cpe:/o:cisco:ios_xe
Required KB Items: Host/Cisco/IOS-XE/Version
Exploit Ease: No known exploits are available
Patch Publication Date: 3/27/2019
Vulnerability Publication Date: 3/27/2019