Detections
Analytics
Cisco IOS XE Products Snort Application Detection Engine Policy Bypass (cisco-sa-snort-app-bypass-cSBYCATq)
medium Nessus Plugin ID 146211
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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 is affected by a vulnerability in the UTD SNORT IPS detection engine due to a flaw in the detection algorithm. An unauthenticated, remote attacker can exploit this by sending crafted packets that would flow through an affected system. A successful exploit could allow the attacker to bypass the configured policies and deliver a malicious payload to the protected network.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 CSCvu21318See Also
Plugin Details
Severity: Medium
ID: 146211
File Name: cisco-sa-snort-app-bypass-cSBYCATq-iosxe.nasl
Version: 1.6
Type: local
Family: CISCO
Published: 2/5/2021
Updated: 8/12/2022
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Low
Score: 1.4
CVSS v2
Risk Factor: Medium
Base Score: 5
Temporal Score: 3.7
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N
CVSS Score Source: CVE-2021-1236
CVSS v3
Risk Factor: Medium
Base Score: 5.3
Temporal Score: 4.6
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
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/IOS-XE/Model
Exploit Ease: No known exploits are available
Patch Publication Date: 1/13/2021
Vulnerability Publication Date: 2/2/2021
Reference Information
CVE: CVE-2021-1236