CVE-2021-1495

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 specific HTTP header parameters. An attacker could exploit this vulnerability by sending crafted HTTP packets through an affected device. A successful exploit could allow the attacker to bypass a configured file policy for HTTP packets and deliver a malicious payload.

CVSS v3 5.8 MEDIUM
CVSS v2.0 5.0 MEDIUM

5.8^/10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

5.0^/10

CVSS v2.0 : MEDIUM

V2 Legend

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

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact NONE

References

Link	Resource
https://lists.debian.org/debian-lts-announce/2023/02/msg00011.html
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-http-fp-bp-KfDdcQhc	Vendor Advisory
https://www.debian.org/security/2023/dsa-5354
https://lists.debian.org/debian-lts-announce/2023/02/msg00011.html
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-http-fp-bp-KfDdcQhc	Vendor Advisory
https://www.debian.org/security/2023/dsa-5354

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:cisco:firepower_threat_defense::::::::
	cpe:2.3:a:cisco:firepower_threat_defense::::::::
	cpe:2.3:a:cisco:firepower_threat_defense::::::::

Configuration 2 (hide)

AND

OR	cpe:2.3:a:cisco:ios_xe::::::::
	cpe:2.3:a:snort:snort::::::::
	cpe:2.3:o:cisco:ios_xe::::::::
	cpe:2.3:o:cisco:ios_xe::::::::

OR	cpe:2.3:h:cisco:1100-4g\/6g_integrated_services_router:-:::::::*
	cpe:2.3:h:cisco:1101_integrated_services_router:-:::::::*
	cpe:2.3:h:cisco:1109_integrated_services_router:-:::::::*
	cpe:2.3:h:cisco:1111x_integrated_services_router:-:::::::*
	cpe:2.3:h:cisco:111x_integrated_services_router:-:::::::*
	cpe:2.3:h:cisco:1120_integrated_services_router:-:::::::*
	cpe:2.3:h:cisco:1160_integrated_services_router:-:::::::*
	cpe:2.3:h:cisco:3000_integrated_services_router:-:::::::*
	cpe:2.3:h:cisco:4221_integrated_services_router:-:::::::*
	cpe:2.3:h:cisco:4331_integrated_services_router:-:::::::*
	cpe:2.3:h:cisco:4431_integrated_services_router:-:::::::*
	cpe:2.3:h:cisco:4461_integrated_services_router:-:::::::*
	cpe:2.3:h:cisco:c8200-1n-4t:-:::::::*
	cpe:2.3:h:cisco:c8200l-1n-4t:-:::::::*
	cpe:2.3:h:cisco:catalyst_8300-1n1s-4t2x:-:::::::*
	cpe:2.3:h:cisco:catalyst_8300-1n1s-6t:-:::::::*
	cpe:2.3:h:cisco:catalyst_8300-2n2s-4t2x:-:::::::*
	cpe:2.3:h:cisco:catalyst_8300-2n2s-6t:-:::::::*
	cpe:2.3:h:cisco:catalyst_8500l:-:::::::*

History

21 Nov 2024, 05:44

Type	Values Removed	Values Added
CVSS	v2 : ~~5.0~~ v3 : ~~5.3~~	v2 : 5.0 v3 : 5.8
References	~~() https://lists.debian.org/debian-lts-announce/2023/02/msg00011.html -~~	() https://lists.debian.org/debian-lts-announce/2023/02/msg00011.html -
References	~~() https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-http-fp-bp-KfDdcQhc - Vendor Advisory~~	() https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-http-fp-bp-KfDdcQhc - Vendor Advisory
References	~~() https://www.debian.org/security/2023/dsa-5354 -~~	() https://www.debian.org/security/2023/dsa-5354 -

22 May 2023, 18:57

Type	Values Removed	Values Added
CPE	cpe:2.3:h:cisco:isr_1100-4g\/6g:-:::::::* cpe:2.3:h:cisco:isr_4461:-:::::::* cpe:2.3:h:cisco:isr_1101:-:::::::* cpe:2.3:h:cisco:isr_1120:-:::::::* cpe:2.3:h:cisco:isr_1111x:-:::::::* cpe:2.3:h:cisco:isr_3000:-:::::::* cpe:2.3:h:cisco:isr_1160:-:::::::* cpe:2.3:h:cisco:isr_4221:-:::::::* cpe:2.3:h:cisco:isr_4431:-:::::::* cpe:2.3:h:cisco:isr_111x:-:::::::* cpe:2.3:h:cisco:isr_4331:-:::::::* cpe:2.3:h:cisco:isr_1109:-:::::::*	cpe:2.3:h:cisco:1160_integrated_services_router:-:::::::* cpe:2.3:h:cisco:4221_integrated_services_router:-:::::::* cpe:2.3:h:cisco:1109_integrated_services_router:-:::::::* cpe:2.3:h:cisco:4331_integrated_services_router:-:::::::* cpe:2.3:h:cisco:1100-4g\/6g_integrated_services_router:-:::::::* cpe:2.3:h:cisco:3000_integrated_services_router:-:::::::* cpe:2.3:h:cisco:1120_integrated_services_router:-:::::::* cpe:2.3:h:cisco:4461_integrated_services_router:-:::::::* cpe:2.3:h:cisco:1111x_integrated_services_router:-:::::::* cpe:2.3:h:cisco:111x_integrated_services_router:-:::::::* cpe:2.3:h:cisco:4431_integrated_services_router:-:::::::* cpe:2.3:h:cisco:1101_integrated_services_router:-:::::::*

19 Feb 2023, 04:15

Type	Values Removed	Values Added
References		(MLIST) https://lists.debian.org/debian-lts-announce/2023/02/msg00011.html - (DEBIAN) https://www.debian.org/security/2023/dsa-5354 -

27 Oct 2022, 15:47

Type	Values Removed	Values Added
CPE		cpe:2.3:o:cisco:ios_xe::::::::

Information

Published : 2021-04-29 18:15

Updated : 2024-11-21 05:44

NVD link : CVE-2021-1495

Mitre link : CVE-2021-1495

CVE.ORG link : CVE-2021-1495

JSON object : View

Products Affected

cisco

catalyst_8300-1n1s-6t
1111x_integrated_services_router
1100-4g\/6g_integrated_services_router
c8200-1n-4t
catalyst_8300-2n2s-4t2x
c8200l-1n-4t
ios_xe
catalyst_8300-1n1s-4t2x
1120_integrated_services_router
4221_integrated_services_router
3000_integrated_services_router
1160_integrated_services_router
catalyst_8300-2n2s-6t
1101_integrated_services_router
111x_integrated_services_router
4461_integrated_services_router
catalyst_8500l
4431_integrated_services_router
firepower_threat_defense
1109_integrated_services_router
4331_integrated_services_router

snort

snort

CWE

CWE-755

Improper Handling of Exceptional Conditions

{"id": "CVE-2021-1495", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 5.0, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N", "authentication": "NONE", "integrityImpact": "PARTIAL", "accessComplexity": "LOW", "availabilityImpact": "NONE", "confidentialityImpact": "NONE"}, "acInsufInfo": false, "impactScore": 2.9, "baseSeverity": "MEDIUM", "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Secondary", "source": "ykramarz@cisco.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 5.8, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 1.4, "exploitabilityScore": 3.9}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 1.4, "exploitabilityScore": 3.9}]}, "published": "2021-04-29T18:15:09.430", "references": [{"url": "https://lists.debian.org/debian-lts-announce/2023/02/msg00011.html", "source": "ykramarz@cisco.com"}, {"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-http-fp-bp-KfDdcQhc", "tags": ["Vendor Advisory"], "source": "ykramarz@cisco.com"}, {"url": "https://www.debian.org/security/2023/dsa-5354", "source": "ykramarz@cisco.com"}, {"url": "https://lists.debian.org/debian-lts-announce/2023/02/msg00011.html", "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-http-fp-bp-KfDdcQhc", "tags": ["Vendor Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.debian.org/security/2023/dsa-5354", "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-755"}]}], "descriptions": [{"lang": "en", "value": "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 specific HTTP header parameters. An attacker could exploit this vulnerability by sending crafted HTTP packets through an affected device. A successful exploit could allow the attacker to bypass a configured file policy for HTTP packets and deliver a malicious payload."}, {"lang": "es", "value": "M\u00faltiples productos de Cisco est\u00e1n afectados por una vulnerabilidad en el motor de detecci\u00f3n Snort que podr\u00eda permitir a un atacante remoto no autenticado omitir una pol\u00edtica de archivos configurada para HTTP. La vulnerabilidad es debido a un manejo incorrecto de par\u00e1metros espec\u00edficos del encabezado HTTP. Un atacante podr\u00eda explotar esta vulnerabilidad mediante el env\u00edo de paquetes HTTP dise\u00f1ados por medio de un dispositivo afectado. Una explotaci\u00f3n con \u00e9xito podr\u00eda permitir al atacante omitir una pol\u00edtica de archivos configurada para paquetes HTTP y entregar una carga \u00fatil maliciosa"}], "lastModified": "2024-11-21T05:44:28.830", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "FAE65CB5-08E5-41B6-9AC0-02451C90E833", "versionEndExcluding": "6.4.0.12"}, {"criteria": "cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "04202164-FCC4-413E-90B5-01FE08AC6EEC", "versionEndExcluding": "6.6.4", "versionStartIncluding": "6.5.0"}, {"criteria": "cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "FDDF492B-BC61-4814-B05F-3F6CD07080F7", "versionEndExcluding": "6.7.0.2", "versionStartIncluding": "6.7.0"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:cisco:ios_xe:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D3BCB821-CD8E-4D1D-968E-D52715B4CDDE", "versionEndExcluding": "16.12.5", "versionStartIncluding": "16.12"}, {"criteria": "cpe:2.3:a:snort:snort:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3ABE8CC6-FFE8-48D2-B94A-C8AED78AA2D2", "versionEndExcluding": "2.9.17.1"}, {"criteria": "cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F3A8DECA-0833-4207-9EC7-DFC60A7EF1C3", "versionEndExcluding": "17.3.3", "versionStartIncluding": "17.1"}, {"criteria": "cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3CFEDAF8-A6E8-4F01-B6D5-5099107BF77F", "versionEndExcluding": "17.4.1", "versionStartIncluding": "17.4"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:cisco:1100-4g\\/6g_integrated_services_router:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "A6F668B9-2C1D-4306-8286-35E67D0F67C7"}, {"criteria": "cpe:2.3:h:cisco:1101_integrated_services_router:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "5EB8A757-7888-4AC2-BE44-B89DB83C6C77"}, {"criteria": "cpe:2.3:h:cisco:1109_integrated_services_router:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "B80890A8-E3D3-462C-B125-9E9BC6525B02"}, {"criteria": "cpe:2.3:h:cisco:1111x_integrated_services_router:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "0547E196-5991-4C33-823A-342542E9DFD3"}, {"criteria": "cpe:2.3:h:cisco:111x_integrated_services_router:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "802CBFC1-8A2F-4BF7-A1D3-00622C33BE16"}, {"criteria": "cpe:2.3:h:cisco:1120_integrated_services_router:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "7AFE0FC1-EEBC-42F0-88B0-4AF5B76DDD97"}, {"criteria": "cpe:2.3:h:cisco:1160_integrated_services_router:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "D916389F-54DB-44CB-91DD-7CE3C7059350"}, {"criteria": "cpe:2.3:h:cisco:3000_integrated_services_router:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "9B8C4D97-A430-45FB-9EF5-B6E4DBA1BD31"}, {"criteria": "cpe:2.3:h:cisco:4221_integrated_services_router:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "6C8AED7C-DDA3-4C29-BB95-6518C02C551A"}, {"criteria": "cpe:2.3:h:cisco:4331_integrated_services_router:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "5419CB9F-241F-4431-914F-2659BE27BEA5"}, {"criteria": "cpe:2.3:h:cisco:4431_integrated_services_router:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "5720462A-BE6B-4E84-A1A1-01E80BBA86AD"}, {"criteria": "cpe:2.3:h:cisco:4461_integrated_services_router:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "E8B60888-6E2B-494E-AC65-83337661EE7D"}, {"criteria": "cpe:2.3:h:cisco:c8200-1n-4t:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "CCF17101-9EF9-47BB-B966-0FA9B71AEEFA"}, {"criteria": "cpe:2.3:h:cisco:c8200l-1n-4t:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "E2F0C218-B0FF-4BEC-B76F-1F4BAA6D0960"}, {"criteria": "cpe:2.3:h:cisco:catalyst_8300-1n1s-4t2x:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "5E7E8914-7B25-4097-8B22-6928C1F03D5A"}, {"criteria": "cpe:2.3:h:cisco:catalyst_8300-1n1s-6t:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "B207857B-C483-47DF-9FC7-6A05B866BF60"}, {"criteria": "cpe:2.3:h:cisco:catalyst_8300-2n2s-4t2x:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "CD26746A-80D1-4C48-BF77-E9F7EEEF7EA7"}, {"criteria": "cpe:2.3:h:cisco:catalyst_8300-2n2s-6t:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "BDB16CCE-1E89-4707-86C1-97F2FB5B62B9"}, {"criteria": "cpe:2.3:h:cisco:catalyst_8500l:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "04AB61E9-0148-495E-BD21-64D52DE60A6C"}], "operator": "OR"}], "operator": "AND"}], "sourceIdentifier": "ykramarz@cisco.com"}

5.8 /10

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

5.0 /10

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact NONE

JSON object

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5.8^/10

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