Cisco IOS XE Software RESTCONF NETCONF YANG Access Control List DoS (cisco-sa-confacl-HbPtfSuO)

high Nessus Plugin ID 141499
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VPR Score: 4.4

Synopsis

The remote device is missing a vendor-supplied security patch.

Description

According to its self-reported version, IOS-XE is affected by a denial of service (DoS) vulnerability in the RESTCONF and NETCONF-YANG access control list (ACL) function. An unauthenticated, remote attacker can exploit this, by accessing the device using RESTCONF or NETCONF-YANG to cause the device to reload, causing a DoS condition.

Solution

Upgrade to the relevant fixed version referenced in Cisco bug ID CSCvs72434.

See Also

http://www.nessus.org/u?a1e90eb4

http://tools.cisco.com/security/center/viewErp.x?alertId=ERP-74268

Plugin Details

Severity: High

ID: 141499

File Name: cisco-sa-confacl-HbPtfSuO-iosxe.nasl

Version: 1.7

Type: local

Family: CISCO

Published: 10/19/2020

Updated: 1/8/2021

Dependencies: cisco_ios_xe_version.nasl

Risk Information

Risk Factor: High

VPR Score: 4.4

CVSS Score Source: CVE-2020-3407

CVSS v2.0

Base Score: 7.1

Temporal Score: 5.3

Vector: AV:N/AC:M/Au:N/C:N/I:N/A:C

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

CVSS v3.0

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: 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: 9/24/2020

Vulnerability Publication Date: 9/24/2020

Reference Information

CVE: CVE-2020-3407

CISCO-BUG-ID: CSCvs72434

CISCO-SA: cisco-sa-confacl-HbPtfSuO

IAVA: 2020-A-0439

CWE: 476