CVE-2021-1223

Multiple Cisco Products Snort HTTP Detection Engine File Policy Bypass Vulnerability

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Attend

*SSVC

Descriptions

Multiple Cisco products are affected by a vulnerability in the Snort detection engine that could allow an unauthenticated, remote attacker to bypass a configured file policy for HTTP. The vulnerability is due to incorrect handling of an HTTP range header. An attacker could exploit this vulnerability by sending crafted HTTP packets through an affected device. A successful exploit could allow the attacker to bypass configured file policy for HTTP packets and deliver a malicious payload.

Múltiples productos de Cisco están afectados por una vulnerabilidad en el motor de detección de Snort que podría permitir a un atacante remoto no autenticado omita una política de archivos configurada para HTTP. La vulnerabilidad es debido al manejo incorrecto de un encabezado de rango HTTP. Un atacante podría explotar esta vulnerabilidad mediante el envío de paquetes HTTP diseñados a través de un dispositivo afectado. Una explotación con éxito podría permitir al atacante omitir la política de archivos configurada para paquetes HTTP y entregar una carga útil maliciosa.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:Attend

Exploitation

None

Automatable

Yes

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2020-11-13 CVE Reserved
2021-01-13 CVE Published
2024-11-02 EPSS Updated
2024-11-12 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-693: Protection Mechanism Failure

CAPEC

References (3)

URL	Tag	Source
https://lists.debian.org/debian-lts-announce/2023/02/msg00011.html	Mailing List

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort-filepolbypass-67DEwMe2	2023-05-22
https://www.debian.org/security/2023/dsa-5354	2023-05-22

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	< 17.4.1 Search vendor "Cisco" for product "Ios Xe" and version " < 17.4.1"	-	Affected	in	Cisco Search vendor "Cisco"	1100-4p Integrated Services Router Search vendor "Cisco" for product "1100-4p Integrated Services Router"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	< 17.4.1 Search vendor "Cisco" for product "Ios Xe" and version " < 17.4.1"	-	Affected	in	Cisco Search vendor "Cisco"	1100-8p Integrated Services Router Search vendor "Cisco" for product "1100-8p Integrated Services Router"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	< 17.4.1 Search vendor "Cisco" for product "Ios Xe" and version " < 17.4.1"	-	Affected	in	Cisco Search vendor "Cisco"	1101-4p Integrated Services Router Search vendor "Cisco" for product "1101-4p Integrated Services Router"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	< 17.4.1 Search vendor "Cisco" for product "Ios Xe" and version " < 17.4.1"	-	Affected	in	Cisco Search vendor "Cisco"	1109-2p Integrated Services Router Search vendor "Cisco" for product "1109-2p Integrated Services Router"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	< 17.4.1 Search vendor "Cisco" for product "Ios Xe" and version " < 17.4.1"	-	Affected	in	Cisco Search vendor "Cisco"	1109-4p Integrated Services Router Search vendor "Cisco" for product "1109-4p Integrated Services Router"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	< 17.4.1 Search vendor "Cisco" for product "Ios Xe" and version " < 17.4.1"	-	Affected	in	Cisco Search vendor "Cisco"	1111x-8p Integrated Services Router Search vendor "Cisco" for product "1111x-8p Integrated Services Router"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	< 17.4.1 Search vendor "Cisco" for product "Ios Xe" and version " < 17.4.1"	-	Affected	in	Cisco Search vendor "Cisco"	4221 Integrated Services Router Search vendor "Cisco" for product "4221 Integrated Services Router"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	< 17.4.1 Search vendor "Cisco" for product "Ios Xe" and version " < 17.4.1"	-	Affected	in	Cisco Search vendor "Cisco"	4321 Integrated Services Router Search vendor "Cisco" for product "4321 Integrated Services Router"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	< 17.4.1 Search vendor "Cisco" for product "Ios Xe" and version " < 17.4.1"	-	Affected	in	Cisco Search vendor "Cisco"	4331 Integrated Services Router Search vendor "Cisco" for product "4331 Integrated Services Router"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	< 17.4.1 Search vendor "Cisco" for product "Ios Xe" and version " < 17.4.1"	-	Affected	in	Cisco Search vendor "Cisco"	4351 Integrated Services Router Search vendor "Cisco" for product "4351 Integrated Services Router"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	< 17.4.1 Search vendor "Cisco" for product "Ios Xe" and version " < 17.4.1"	-	Affected	in	Cisco Search vendor "Cisco"	4431 Integrated Services Router Search vendor "Cisco" for product "4431 Integrated Services Router"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	< 17.4.1 Search vendor "Cisco" for product "Ios Xe" and version " < 17.4.1"	-	Affected	in	Cisco Search vendor "Cisco"	4451-x Integrated Services Router Search vendor "Cisco" for product "4451-x Integrated Services Router"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	< 17.4.1 Search vendor "Cisco" for product "Ios Xe" and version " < 17.4.1"	-	Affected	in	Cisco Search vendor "Cisco"	4461 Integrated Services Router Search vendor "Cisco" for product "4461 Integrated Services Router"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	< 17.4.1 Search vendor "Cisco" for product "Ios Xe" and version " < 17.4.1"	-	Affected	in	Cisco Search vendor "Cisco"	Csr 1000v Search vendor "Cisco" for product "Csr 1000v"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	< 17.4.1 Search vendor "Cisco" for product "Ios Xe" and version " < 17.4.1"	-	Affected	in	Cisco Search vendor "Cisco"	Isa 3000 Search vendor "Cisco" for product "Isa 3000"	-	-	Safe
Cisco Search vendor "Cisco"		Firepower Management Center Search vendor "Cisco" for product "Firepower Management Center"				2.9.14.0 Search vendor "Cisco" for product "Firepower Management Center" and version "2.9.14.0"		-		Affected
Cisco Search vendor "Cisco"		Firepower Management Center Search vendor "Cisco" for product "Firepower Management Center"				2.9.15 Search vendor "Cisco" for product "Firepower Management Center" and version "2.9.15"		-		Affected
Cisco Search vendor "Cisco"		Firepower Management Center Search vendor "Cisco" for product "Firepower Management Center"				2.9.16 Search vendor "Cisco" for product "Firepower Management Center" and version "2.9.16"		-		Affected
Cisco Search vendor "Cisco"		Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"				< 6.7.0 Search vendor "Cisco" for product "Firepower Threat Defense" and version " < 6.7.0"		-		Affected
Snort Search vendor "Snort"		Snort Search vendor "Snort" for product "Snort"				< 2.9.17 Search vendor "Snort" for product "Snort" and version " < 2.9.17"		-		Affected