CVE-2019-1728

A vulnerability in the Secure Configuration Validation functionality of Cisco FXOS Software and Cisco NX-OS Software could allow an authenticated, local attacker to run arbitrary commands at system boot time with the privileges of root. The vulnerability is due to a lack of proper validation of system files when the persistent configuration information is read from the file system. An attacker could exploit this vulnerability by authenticating to the device and overwriting the persistent configuration storage with malicious executable files. An exploit could allow the attacker to run arbitrary commands at system startup and those commands will run as the root user. The attacker must have valid administrative credentials for the device.

CVSS v3.0 6.7 MEDIUM
CVSS v2.0 7.2 HIGH

6.7^/10

CVSS v3.0 : MEDIUM

V3 Legend

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

Exploitability : 0.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

7.2^/10

CVSS v2.0 : HIGH

V2 Legend

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

Exploitability : 3.9 / Impact : 10.0

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190515-nxos-conf-bypass	Vendor Advisory
http://www.securityfocus.com/bid/108391

Configurations

Configuration 1 (hide)

AND

OR	cpe:2.3:o:cisco:nx-os::::::::
	cpe:2.3:o:cisco:nx-os::::::::

OR	cpe:2.3:h:cisco:mds_9500:-:::::::*
	cpe:2.3:h:cisco:mds_9700:-:::::::*
	cpe:2.3:h:cisco:mds_9000:-:::::::*
	cpe:2.3:h:cisco:mds_9100:-:::::::*
	cpe:2.3:h:cisco:mds_9200:-:::::::*

Configuration 2 (hide)

AND

cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*

OR	cpe:2.3:h:cisco:nexus_3500:-:::::::*
	cpe:2.3:h:cisco:nexus_3600:-:::::::*
	cpe:2.3:h:cisco:nexus_3200:-:::::::*
	cpe:2.3:h:cisco:nexus_3400:-:::::::*
	cpe:2.3:h:cisco:nexus_3100-z:-:::::::*
	cpe:2.3:h:cisco:nexus_3100v:-:::::::*
	cpe:2.3:h:cisco:nexus_9300:-:::::::*
	cpe:2.3:h:cisco:nexus_9500:-:::::::*
	cpe:2.3:h:cisco:nexus_3000:-:::::::*
	cpe:2.3:h:cisco:nexus_3100:-:::::::*
	cpe:2.3:h:cisco:nexus_9000:-:::::::*
	cpe:2.3:h:cisco:nexus_9200:-:::::::*

Configuration 3 (hide)

AND

OR	cpe:2.3:o:cisco:nx-os::::::::
	cpe:2.3:o:cisco:nx-os::::::::

OR	cpe:2.3:h:cisco:nexus_3548-x:-:::::::*
	cpe:2.3:h:cisco:nexus_3548-xl:-:::::::*
	cpe:2.3:h:cisco:nexus_3524-x:-:::::::*
	cpe:2.3:h:cisco:nexus_3524-xl:-:::::::*

Configuration 4 (hide)

AND

cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*

OR	cpe:2.3:h:cisco:nexus_6000:-:::::::*
	cpe:2.3:h:cisco:nexus_5500:-:::::::*
	cpe:2.3:h:cisco:nexus_5600:-:::::::*

Configuration 5 (hide)

AND

OR	cpe:2.3:o:cisco:nx-os::::::::
	cpe:2.3:o:cisco:nx-os::::::::
	cpe:2.3:o:cisco:nx-os::::::::

OR	cpe:2.3:h:cisco:nexus_7000:-:::::::*
	cpe:2.3:h:cisco:nexus_7700:-:::::::*

Configuration 6 (hide)

AND

cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*

OR	cpe:2.3:h:cisco:usc_6324:-:::::::*
	cpe:2.3:h:cisco:ucs_6248up:-:::::::*
	cpe:2.3:h:cisco:ucs_6296up:-:::::::*
	cpe:2.3:h:cisco:ucs_6332:-:::::::*
	cpe:2.3:h:cisco:usc_6332-16up:-:::::::*

Configuration 7 (hide)

AND

cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*

OR	cpe:2.3:h:cisco:firepower_4145:-:::::::*
	cpe:2.3:h:cisco:firepower_4150:-:::::::*
	cpe:2.3:h:cisco:firepower_4125:-:::::::*
	cpe:2.3:h:cisco:firepower_4140:-:::::::*
	cpe:2.3:h:cisco:firepower_4110:-:::::::*
	cpe:2.3:h:cisco:firepower_9300:-:::::::*
	cpe:2.3:h:cisco:firepower_4115:-:::::::*
	cpe:2.3:h:cisco:firepower_4120:-:::::::*

Information

Published : 2019-05-15 10:29

Updated : 2019-05-21 06:29

NVD link : CVE-2019-1728

Mitre link : CVE-2019-1728

JSON object : View

CWE

CWE-347

Improper Verification of Cryptographic Signature

Products Affected

cisco

usc_6332-16up
firepower_9300
mds_9700
nexus_3548-x
nexus_5500
usc_6324
nexus_9000
mds_9000
ucs_6296up
nexus_3000
nexus_3524-xl
mds_9100
nexus_3100
nexus_3100-z
nexus_6000
firepower_4140
firepower_4115
mds_9500
nexus_9200
nexus_3524-x
nexus_7700
ucs_6332
nexus_3500
nexus_5600
nexus_3200
firepower_4125
firepower_4150
nexus_3100v
mds_9200
nx-os
ucs_6248up
nexus_9500
firepower_4145
firepower_4110
nexus_3548-xl
nexus_7000
firepower_4120
nexus_9300
nexus_3600
nexus_3400

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190515-nxos-conf-bypass", "name": "20190515 Cisco FXOS and NX-OS Software Secure Configuration Bypass Vulnerability", "tags": ["Vendor Advisory"], "refsource": "CISCO"}, {"url": "http://www.securityfocus.com/bid/108391", "name": "108391", "tags": [], "refsource": "BID"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "A vulnerability in the Secure Configuration Validation functionality of Cisco FXOS Software and Cisco NX-OS Software could allow an authenticated, local attacker to run arbitrary commands at system boot time with the privileges of root. The vulnerability is due to a lack of proper validation of system files when the persistent configuration information is read from the file system. An attacker could exploit this vulnerability by authenticating to the device and overwriting the persistent configuration storage with malicious executable files. An exploit could allow the attacker to run arbitrary commands at system startup and those commands will run as the root user. The attacker must have valid administrative credentials for the device."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-347"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2019-1728", "ASSIGNER": "psirt@cisco.com"}}, "impact": {"baseMetricV2": {"cvssV2": {"version": "2.0", "baseScore": 7.2, "accessVector": "LOCAL", "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C", "authentication": "NONE", "integrityImpact": "COMPLETE", "accessComplexity": "LOW", "availabilityImpact": "COMPLETE", "confidentialityImpact": "COMPLETE"}, "severity": "HIGH", "acInsufInfo": false, "impactScore": 10.0, "obtainAllPrivilege": false, "exploitabilityScore": 3.9, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}, "baseMetricV3": {"cvssV3": {"scope": "UNCHANGED", "version": "3.0", "baseScore": 6.7, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "HIGH", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 0.8}}, "publishedDate": "2019-05-15T17:29Z", "configurations": {"nodes": [{"children": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "8.3\\(1\\)", "versionStartIncluding": "8.2"}, {"cpe23Uri": "cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "8.1\\(1b\\)", "versionStartIncluding": "8.1"}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:h:cisco:mds_9500:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:mds_9700:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:mds_9000:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:mds_9100:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:mds_9200:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}]}], "operator": "AND", "cpe_match": []}, {"children": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "7.0\\(3\\)i7\\(3\\)", "versionStartIncluding": "7.0\\(3\\)i7"}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:h:cisco:nexus_3500:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_3600:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_3200:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_3400:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_3100-z:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_3100v:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_9300:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_9500:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_3000:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_3100:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_9000:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_9200:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}]}], "operator": "AND", "cpe_match": []}, {"children": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "6.0\\(2\\)a8\\(11\\)", "versionStartIncluding": "6.0\\(2\\)a8"}, {"cpe23Uri": "cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "7.0\\(3\\)i7\\(3\\)", "versionStartIncluding": "7.0\\(3\\)"}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:h:cisco:nexus_3548-x:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_3548-xl:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_3524-x:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_3524-xl:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}]}], "operator": "AND", "cpe_match": []}, {"children": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "7.3\\(4\\)n1\\(1\\)", "versionStartIncluding": "7.3"}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:h:cisco:nexus_6000:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_5500:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_5600:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}]}], "operator": "AND", "cpe_match": []}, {"children": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "8.3\\(1\\)", "versionStartIncluding": "8.0"}, {"cpe23Uri": "cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "6.2\\(22\\)", "versionStartIncluding": "6.2"}, {"cpe23Uri": "cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "7.3\\(3\\)d1\\(1\\)", "versionStartIncluding": "7.2"}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:h:cisco:nexus_7000:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_7700:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}]}], "operator": "AND", "cpe_match": []}, {"children": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "4.0\\(1a\\)", "versionStartIncluding": "4.0"}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:h:cisco:usc_6324:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:ucs_6248up:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:ucs_6296up:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:ucs_6332:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:usc_6332-16up:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}]}], "operator": "AND", "cpe_match": []}, {"children": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "2.4.1.101", "versionStartIncluding": "2.4"}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:h:cisco:firepower_4145:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:firepower_4150:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:firepower_4125:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:firepower_4140:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:firepower_4110:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:firepower_9300:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:firepower_4115:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:firepower_4120:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}]}], "operator": "AND", "cpe_match": []}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2019-05-21T13:29Z"}

6.7 /10

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

7.2 /10

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

JSON object

Attach tags to CVE-2019-1728

6.7^/10

7.2^/10

Attach tags to `CVE-2019-1728`