Detections
Analytics
Cisco IOS XE Software IPsec VPN DoS (cisco-sa-iosxe-vpn-dos-edOmW28Z)
medium Nessus Plugin ID 138211
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Synopsis
The remote device is missing a vendor-supplied security patch.Description
According to its self-reported version, Cisco IOS XE Software is affected by a denial of service (DoS) vulnerability in the hardware crypto driver due to insufficient verification of authenticity of received Encapsulating Security Payload (ESP) packets. An attacker could exploit this vulnerability by tampering with ESP cleartext values as a man-in-the-middle in order disconnect legitimate IPsec VPN sessions to an affected device.Please see the included Cisco BID and Cisco Security Advisory for more information.
Solution
Upgrade to the relevant fixed version referenced in Cisco bug ID CSCvq67658See Also
Plugin Details
Severity: Medium
ID: 138211
File Name: cisco-sa-iosxe-vpn-dos-edOmW28Z-iosxe.nasl
Version: 1.8
Type: local
Family: CISCO
Published: 7/8/2020
Updated: 6/3/2021
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.4
CVSS v2
Risk Factor: High
Base Score: 7.1
Temporal Score: 5.3
Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:C
CVSS Score Source: CVE-2020-3220
CVSS v3
Risk Factor: Medium
Base Score: 6.8
Temporal Score: 5.9
Vector: CVSS:3.0/AV:N/AC:H/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, Host/Cisco/device_model
Exploit Ease: No known exploits are available
Patch Publication Date: 6/3/2020
Vulnerability Publication Date: 6/3/2020
Reference Information
CVE: CVE-2020-3220