Cisco Integrated Services Routers 1000/4000 Series HTTP Detection Engine File Policy Bypass (cisco-sa-snort-filepolbypass-67DEwMe2)

high Nessus Plugin ID 146202
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The remote device is missing a vendor-supplied security patch.


According to its version and configuration, the Cisco Software running on the remote Integrated Services Router device is affected by affected by a file policy bypass vulnerability due to the incorrect handling of a HTTP range header. An unauthenticated, remote attacker could send a carefully crafted malicious payload to the device bypass file policy configurations


Upgrade to the relevant fixed version referenced in Cisco bug IDs CSCvu18635

See Also

Plugin Details

Severity: High

ID: 146202

File Name: cisco-sa-snort-filepolbypass-isr-isa-isrv-67DEwMe2.nasl

Version: 1.8

Type: combined

Family: CISCO

Published: 2/4/2021

Updated: 7/29/2021

Dependencies: cisco_ios_xe_version.nasl

Configuration: Enable paranoid mode

Risk Information

CVSS Score Source: CVE-2021-1223


Risk Factor: Low

Score: 3.6


Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N

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


Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

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

Vulnerability Information

Required KB Items: Host/Cisco/IOS-XE/Version, Settings/ParanoidReport

Exploit Ease: No known exploits are available

Patch Publication Date: 1/13/2021

Vulnerability Publication Date: 1/13/2021

Reference Information

CVE: CVE-2021-1223


CISCO-SA: cisco-sa-snort-filepolbypass-67DEwMe2

IAVA: 2021-A-0027-S

CWE: 284