CVE-2019-1730

A vulnerability in the Bash shell implementation for Cisco NX-OS Software could allow an authenticated, local attacker to bypass the limited command set of the restricted Guest Shell and execute commands at the privilege level of a network-admin user outside of the Guest Shell. The attacker must authenticate with valid administrator device credentials. The vulnerability is due to the incorrect implementation of a CLI command that allows a Bash command to be incorrectly invoked on the Guest Shell CLI. An attacker could exploit this vulnerability by authenticating to the device and entering a crafted command at the Guest Shell prompt. A successful exploit could allow the attacker to issue commands that should be restricted by a Guest Shell account.

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

6.7^/10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

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-bash-bypass	Vendor Advisory
http://www.securityfocus.com/bid/108397	Third Party Advisory VDB Entry

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:nexus_3000:-:::::::*
	cpe:2.3:h:cisco:nexus_3100:-:::::::*
	cpe:2.3:h:cisco:nexus_3100-z:-:::::::*
	cpe:2.3:h:cisco:nexus_3100v:-:::::::*
	cpe:2.3:h:cisco:nexus_3200:-:::::::*
	cpe:2.3:h:cisco:nexus_3400:-:::::::*
	cpe:2.3:h:cisco:nexus_3500:-:::::::*
	cpe:2.3:h:cisco:nexus_3524-x:-:::::::*
	cpe:2.3:h:cisco:nexus_3524-xl:-:::::::*
	cpe:2.3:h:cisco:nexus_3548-x:-:::::::*
	cpe:2.3:h:cisco:nexus_3548-xl:-:::::::*
	cpe:2.3:h:cisco:nexus_92160yc-x:-:::::::*
	cpe:2.3:h:cisco:nexus_9332pq:-:::::::*
	cpe:2.3:h:cisco:nexus_93180yc-ex:-:::::::*
	cpe:2.3:h:cisco:nexus_92304qc:-:::::::*
	cpe:2.3:h:cisco:nexus_93128tx:-:::::::*
	cpe:2.3:h:cisco:nexus_9272q:-:::::::*
	cpe:2.3:h:cisco:nexus_93120tx:-:::::::*
	cpe:2.3:h:cisco:nexus_93108tc-ex:-:::::::*
	cpe:2.3:h:cisco:nexus_9336pq_aci_spine:-:::::::*
	cpe:2.3:h:cisco:nexus_9236c:-:::::::*
	cpe:2.3:h:cisco:nexus_9000v:-:::::::*
	cpe:2.3:h:cisco:nexus_92300yc:-:::::::*
	cpe:2.3:h:cisco:nexus_93180lc-ex:-:::::::*
	cpe:2.3:h:cisco:nexus_9348gc-fxp:-:::::::*
	cpe:2.3:h:cisco:nexus_93108tc-fx:-:::::::*
	cpe:2.3:h:cisco:nexus_93180yc-fx:-:::::::*
	cpe:2.3:h:cisco:nexus_93240yc-fx2:-:::::::*
	cpe:2.3:h:cisco:nexus_9336c-fx2:-:::::::*
	cpe:2.3:h:cisco:nexus_9332c:-:::::::*
	cpe:2.3:h:cisco:nexus_93360yc-fx2:-:::::::*
	cpe:2.3:h:cisco:nexus_93216tc-fx2:-:::::::*
	cpe:2.3:h:cisco:nexus_92348gc-x:-:::::::*
	cpe:2.3:h:cisco:nexus_9372tx:-:::::::*
	cpe:2.3:h:cisco:nexus_9396px:-:::::::*
	cpe:2.3:h:cisco:nexus_9372px:-:::::::*
	cpe:2.3:h:cisco:nexus_9396tx:-:::::::*
	cpe:2.3:h:cisco:nexus_9372tx-e:-:::::::*
	cpe:2.3:h:cisco:nexus_9372px-e:-:::::::*
	cpe:2.3:h:cisco:nexus_9364c:-:::::::*

Configuration 2 (hide)

AND

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

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

Configuration 3 (hide)

AND

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

OR	cpe:2.3:h:cisco:nexus_36180yc-r:-:::::::*
	cpe:2.3:h:cisco:nexus_3636c-r:-:::::::*
	cpe:2.3:h:cisco:nexus_9504:-:::::::*
	cpe:2.3:h:cisco:nexus_9508:-:::::::*
	cpe:2.3:h:cisco:nexus_9516:-:::::::*

Information

Published : 2019-05-15 10:29

Updated : 2020-10-09 10:12

NVD link : CVE-2019-1730

Mitre link : CVE-2019-1730

JSON object : View

CWE

NVD-CWE-noinfo

Products Affected

cisco

nexus_9372tx-e
nexus_9236c
nexus_9336pq_aci_spine
nexus_9372px
nexus_93108tc-ex
nexus_9336c-fx2
nexus_3636c-r
nexus_93240yc-fx2
nexus_3548-x
nexus_93108tc-fx
nexus_92348gc-x
nexus_93120tx
nexus_93216tc-fx2
nexus_9372px-e
nexus_3000
nexus_93180lc-ex
nexus_3524-xl
nexus_3100
nexus_93360yc-fx2
nexus_3100-z
nexus_93180yc-ex
nexus_9516
nexus_3524-x
nexus_7700
nexus_92160yc-x
nexus_3500
nexus_9364c
nexus_92300yc
nexus_3200
nexus_9272q
nexus_9504
nexus_93128tx
nexus_9372tx
nexus_93180yc-fx
nexus_9332c
nexus_3100v
nx-os
nexus_9332pq
nexus_9396px
nexus_9000v
nexus_92304qc
nexus_9348gc-fxp
nexus_3548-xl
nexus_7000
nexus_3400
nexus_36180yc-r
nexus_9508
nexus_9396tx

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190515-nxos-bash-bypass", "name": "20190515 Cisco NX-OS Software Bash Bypass Guest Shell Vulnerability", "tags": ["Vendor Advisory"], "refsource": "CISCO"}, {"url": "http://www.securityfocus.com/bid/108397", "name": "108397", "tags": ["Third Party Advisory", "VDB Entry"], "refsource": "BID"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "A vulnerability in the Bash shell implementation for Cisco NX-OS Software could allow an authenticated, local attacker to bypass the limited command set of the restricted Guest Shell and execute commands at the privilege level of a network-admin user outside of the Guest Shell. The attacker must authenticate with valid administrator device credentials. The vulnerability is due to the incorrect implementation of a CLI command that allows a Bash command to be incorrectly invoked on the Guest Shell CLI. An attacker could exploit this vulnerability by authenticating to the device and entering a crafted command at the Guest Shell prompt. A successful exploit could allow the attacker to issue commands that should be restricted by a Guest Shell account."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2019-1730", "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": "3.1", "baseScore": 6.7, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/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": "7.0\\(3\\)i4\\(9\\)", "versionStartIncluding": "7.0\\(3\\)i4"}, {"cpe23Uri": "cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "7.0\\(3\\)i7\\(4\\)", "versionStartIncluding": "7.0\\(3\\)i7"}]}, {"children": [], "operator": "OR", "cpe_match": [{"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_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_3200:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_3400:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_3500:-:*:*:*:*:*:*:*", "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}, {"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_92160yc-x:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_9332pq:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_93180yc-ex:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_92304qc:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_93128tx:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_9272q:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_93120tx:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_93108tc-ex:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_9336pq_aci_spine:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_9236c:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_9000v:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_92300yc:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_93180lc-ex:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_9348gc-fxp:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_93108tc-fx:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_93180yc-fx:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_93240yc-fx2:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_9336c-fx2:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_9332c:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_93360yc-fx2:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_93216tc-fx2:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_92348gc-x:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_9372tx:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_9396px:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_9372px:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_9396tx:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_9372tx-e:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_9372px-e:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_9364c:-:*:*:*:*:*:*:*", "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": "8.1"}]}, {"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": "7.0\\(3\\)f3\\(5\\)", "versionStartIncluding": "7.0\\(3\\)"}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:h:cisco:nexus_36180yc-r:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_3636c-r:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_9504:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_9508:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_9516:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}]}], "operator": "AND", "cpe_match": []}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2020-10-09T17:12Z"}

6.7 /10