Detections
Analytics
Cisco IOS XE Software NETCONF RESTCONF Authentication Bypass (cisco-sa-aaa-Yx47ZT8Q)
critical Nessus Plugin ID 153895
Language:
Synopsis
The remote device is missing a vendor-supplied security patchDescription
According to its self-reported version, Cisco IOS XE Software's authentication, authorization, and accounting (AAA) function is affected by a authentication bypass vulnerability. Therefore, it could allow an unauthenticated, remote attacker to bypass NETCONF or RESTCONF authentication and do any of the following:Install, manipulate, or delete the configuration of an affected device Cause memory corruption that results in a denial of service (DoS) on an affected device This vulnerability is due to an uninitialized variable. An attacker could exploit this vulnerability by sending a series of NETCONF or RESTCONF requests to an affected device. A successful exploit could allow the attacker to use NETCONF or RESTCONF to install, manipulate, or delete the configuration of a network device or to corrupt memory on the device, resulting a DoS.
Please see the included Cisco BIDs and Cisco Security Advisory for more information.
Solution
Upgrade to the relevant fixed version referenced in Cisco bug ID CSCvt53563See Also
http://www.nessus.org/u?086551f4
http://tools.cisco.com/security/center/viewErp.x?alertId=ERP-74581
Plugin Details
Severity: Critical
ID: 153895
File Name: cisco-sa-aaa-Yx47ZT8Q-iosxe.nasl
Version: 1.8
Type: combined
Family: CISCO
Published: 10/6/2021
Updated: 9/28/2023
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 5.2
CVSS v2
Risk Factor: Medium
Base Score: 6.4
Temporal Score: 4.7
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:P
CVSS Score Source: CVE-2021-1619
CVSS v3
Risk Factor: Critical
Base Score: 9.1
Temporal Score: 7.9
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/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: 9/22/2021
Vulnerability Publication Date: 9/22/2021
Reference Information
CVE: CVE-2021-1619