CVE-2021-34761

A vulnerability in Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, local attacker to overwrite or append arbitrary data to system files using root-level privileges. The attacker must have administrative credentials on the device. This vulnerability is due to incomplete validation of user input for a specific CLI command. An attacker could exploit this vulnerability by authenticating to the device with administrative privileges and issuing a CLI command with crafted user parameters. A successful exploit could allow the attacker to overwrite or append arbitrary data to system files using root-level privileges.

CVSS v3 4.4 MEDIUM
CVSS v2.0 6.6 MEDIUM

4.4^/10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 0.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

6.6^/10

CVSS v2.0 : MEDIUM

V2 Legend

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

Exploitability : 3.9 / Impact : 9.2

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-file-write-SHVcmQVc	Vendor Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-file-write-SHVcmQVc	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:cisco:firepower_management_center_virtual_appliance:6.2.3:::::::*
	cpe:2.3:a:cisco:firepower_management_center_virtual_appliance:6.4.0:::::::*
	cpe:2.3:a:cisco:firepower_management_center_virtual_appliance:6.6.1:::::::*
	cpe:2.3:a:cisco:firepower_management_center_virtual_appliance:6.7.0:::::::*
	cpe:2.3:a:cisco:firepower_management_center_virtual_appliance:7.0.0:::::::*
	cpe:2.3:a:cisco:firepower_management_center_virtual_appliance:7.1.0:::::::*
	cpe:2.3:a:cisco:firepower_threat_defense::::::::
	cpe:2.3:a:cisco:firepower_threat_defense::::::::
	cpe:2.3:a:cisco:firepower_threat_defense::::::::
	cpe:2.3:a:cisco:firepower_threat_defense::::::::
	cpe:2.3:a:cisco:sourcefire_defense_center:6.2.3:::::::*
	cpe:2.3:a:cisco:sourcefire_defense_center:6.4.0:::::::*
	cpe:2.3:a:cisco:sourcefire_defense_center:6.6.1:::::::*
	cpe:2.3:a:cisco:sourcefire_defense_center:6.7.0:::::::*
	cpe:2.3:a:cisco:sourcefire_defense_center:7.0.0:::::::*
	cpe:2.3:a:cisco:sourcefire_defense_center:7.1.0:::::::*

History

21 Nov 2024, 06:11

Type	Values Removed	Values Added
References	~~() https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-file-write-SHVcmQVc - Vendor Advisory~~	() https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-file-write-SHVcmQVc - Vendor Advisory
CVSS	v2 : ~~6.6~~ v3 : ~~6.0~~	v2 : 6.6 v3 : 4.4

Information

Published : 2021-10-27 19:15

Updated : 2024-11-21 06:11

NVD link : CVE-2021-34761

Mitre link : CVE-2021-34761

CVE.ORG link : CVE-2021-34761

JSON object : View

Products Affected

cisco

firepower_threat_defense
sourcefire_defense_center
firepower_management_center_virtual_appliance

CWE

CWE-73

External Control of File Name or Path

CWE-668

Exposure of Resource to Wrong Sphere

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The attacker must have administrative credentials on the device. This vulnerability is due to incomplete validation of user input for a specific CLI command. An attacker could exploit this vulnerability by authenticating to the device with administrative privileges and issuing a CLI command with crafted user parameters. A successful exploit could allow the attacker to overwrite or append arbitrary data to system files using root-level privileges."}, {"lang": "es", "value": "Una vulnerabilidad en el software Cisco Firepower Threat Defense (FTD) podr\u00eda permitir a un atacante local autenticado sobrescribir o a\u00f1adir datos arbitrarios a los archivos del sistema usando privilegios de nivel de root. El atacante debe tener credenciales administrativas en el dispositivo. Esta vulnerabilidad es debido a una comprobaci\u00f3n incompleta de la entrada del usuario para un comando CLI espec\u00edfico. Un atacante podr\u00eda explotar esta vulnerabilidad al autenticarse en el dispositivo con privilegios administrativos y emitiendo un comando CLI con par\u00e1metros de usuario dise\u00f1ados. Una explotaci\u00f3n con \u00e9xito podr\u00eda permitir al atacante sobrescribir o a\u00f1adir datos arbitrarios a los archivos del sistema usando privilegios de nivel root"}], "lastModified": "2024-11-21T06:11:08.453", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:cisco:firepower_management_center_virtual_appliance:6.2.3:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F75D9CB4-406B-4FBF-BC7A-35C2CCEFD8B2"}, {"criteria": "cpe:2.3:a:cisco:firepower_management_center_virtual_appliance:6.4.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2C0FC62F-65AD-4855-953A-DA5BBFC1B2E1"}, {"criteria": "cpe:2.3:a:cisco:firepower_management_center_virtual_appliance:6.6.1:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B11AE299-AE40-42EB-9C0B-3865C932E766"}, {"criteria": "cpe:2.3:a:cisco:firepower_management_center_virtual_appliance:6.7.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DA792E5D-7270-4C23-A8D6-22EB00CB21A2"}, {"criteria": "cpe:2.3:a:cisco:firepower_management_center_virtual_appliance:7.0.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0CB38685-4255-4565-98AA-234B9DEEADE3"}, {"criteria": "cpe:2.3:a:cisco:firepower_management_center_virtual_appliance:7.1.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7CF689E1-22FF-467F-B5A7-59833D77971E"}, {"criteria": "cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "17F461B5-E600-4C81-BA3C-1DBC90D4D438", "versionEndExcluding": "6.4.0.13", "versionStartIncluding": "6.4.0"}, {"criteria": "cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "37A74256-AF9A-473B-9DC7-A57618BA9F00", "versionEndExcluding": "6.6.5", "versionStartIncluding": "6.6.0"}, {"criteria": "cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "98DEDDAB-B8C5-4753-A208-94638E694FC1", "versionEndExcluding": "6.7.0.3", "versionStartIncluding": "6.7.0"}, {"criteria": "cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7B2F537A-A488-45B6-AD4B-48B7064AE84C", "versionEndExcluding": "7.0.1", "versionStartIncluding": "7.0.0"}, {"criteria": "cpe:2.3:a:cisco:sourcefire_defense_center:6.2.3:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5E4A3574-53DC-4328-A229-87795AE4F7AF"}, {"criteria": "cpe:2.3:a:cisco:sourcefire_defense_center:6.4.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2EBC6544-6ADF-4F95-A969-A8D953D11B3A"}, {"criteria": "cpe:2.3:a:cisco:sourcefire_defense_center:6.6.1:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2B02800C-6420-4758-89CF-66F47B4FCA19"}, {"criteria": "cpe:2.3:a:cisco:sourcefire_defense_center:6.7.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3F41081E-06CF-4BA2-9072-E18D9032BEBC"}, {"criteria": "cpe:2.3:a:cisco:sourcefire_defense_center:7.0.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "52ED507A-5075-4444-A2D1-F5657453AD3F"}, {"criteria": "cpe:2.3:a:cisco:sourcefire_defense_center:7.1.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F5E9A6F5-8BC2-4FA5-9920-E980EFC5BCEE"}], "operator": "OR"}]}], "sourceIdentifier": "ykramarz@cisco.com"}

4.4 /10

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

6.6 /10

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact COMPLETE

Availability Impact COMPLETE

JSON object

Attach tags to CVE-2021-34761

4.4^/10

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