Detections
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Multiple Cisco Products Snort HTTP Detection Engine File Policy Bypass (cisco-sa-snort_filepolbypass-m4X5DgOP)

medium Nessus Plugin ID 140223

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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 SD-WAN Software is affected by vulnerability in the Snort detection engine. The vulnerability is due to errors in how the Snort detection engine handles specific HTTP responses.
An unauthenticated, remote attacker can exploit this vulnerability by sending crafted HTTP packets that would flow through an affected system. A successful exploit could allow the attacker to bypass the configured file 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 ID CSCvt10151

See Also

http://www.nessus.org/u?bff42201

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvt10151

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvt28138

Plugin Details

Severity: Medium

ID: 140223

File Name: cisco-sa-iosxe-snort_filepolbypass-m4X5DgOP.nasl

Version: 1.13

Type: combined

Family: CISCO

Published: 9/4/2020

Updated: 5/3/2024

Configuration: Enable paranoid mode

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-2020-3315

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, Settings/ParanoidReport

Exploit Ease: No known exploits are available

Patch Publication Date: 5/6/2020

Vulnerability Publication Date: 5/6/2020

Reference Information

CVE: CVE-2020-3315