CVE-2020-3416

Multiple vulnerabilities in the initialization routines that are executed during bootup of Cisco IOS XE Software for Cisco ASR 900 Series Aggregation Services Routers with a Route Switch Processor 3 (RSP3) installed could allow an authenticated, local attacker with high privileges to execute persistent code at bootup and break the chain of trust. These vulnerabilities are due to incorrect validations by boot scripts when specific ROM monitor (ROMMON) variables are set. An attacker could exploit these vulnerabilities by copying a specific file to the local file system of an affected device and defining specific ROMMON variables. A successful exploit could allow the attacker to run arbitrary code on the underlying operating system (OS) with root privileges. To exploit these vulnerabilities, an attacker would need to have access to the root shell on the device or have physical access to the device.

CVSS v3 6.7 MEDIUM
CVSS v2.0 6.9 MEDIUM

6.7^/10

CVSS v3 : MEDIUM

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

6.9^/10

CVSS v2.0 : MEDIUM

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

Exploitability : 3.4 / Impact : 10.0

Access Vector LOCAL

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-rsp3-rce-jVHg8Z7c	Vendor Advisory

Configurations

Configuration 1 (hide)

AND

OR	cpe:2.3:o:cisco:ios_xe:16.12.1:::::::*
	cpe:2.3:o:cisco:ios_xe:17.2:::::::*

OR	cpe:2.3:h:cisco:asr_902:-:::::::*
	cpe:2.3:h:cisco:asr_903:-:::::::*
	cpe:2.3:h:cisco:asr_907:-:::::::*

History

No history.

Information

Published : 2020-09-24 18:15

Updated : 2024-02-04 21:23

NVD link : CVE-2020-3416

Mitre link : CVE-2020-3416

CVE.ORG link : CVE-2020-3416

JSON object : View

Products Affected

cisco

ios_xe
asr_902
asr_907
asr_903

CWE

CWE-94

Improper Control of Generation of Code ('Code Injection')

CWE-749

Exposed Dangerous Method or Function

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To exploit these vulnerabilities, an attacker would need to have access to the root shell on the device or have physical access to the device."}, {"lang": "es", "value": "M\u00faltiples vulnerabilidades en las rutinas de inicializaci\u00f3n que son ejecutadas durante el arranque de Cisco IOS XE Software para Cisco ASR 900 Series Aggregation Services Routers con un Route Switch Processor 3 (RSP3) instalado podr\u00edan permitir a un atacante local autenticado con altos privilegios ejecutar c\u00f3digo persistente en el arranque y romper la cadena de confianza. Estas vulnerabilidades son debido a comprobaciones incorrectas para scripts de arranque cuando son configuradas variables espec\u00edficas del monitor ROM (ROMMON). Un atacante podr\u00eda explotar estas vulnerabilidades al copiar un archivo espec\u00edfico en el sistema de archivos local de un dispositivo afectado y definiendo variables ROMMON espec\u00edficas. Una explotaci\u00f3n con \u00e9xito podr\u00eda permitir al atacante ejecutar c\u00f3digo arbitrario en el sistema operativo (SO) subyacente con privilegios root. \nPara explotar estas vulnerabilidades, un atacante necesitar\u00eda contar con acceso al shell root del dispositivo o contar con acceso f\u00edsico al dispositivo."}], "lastModified": "2023-11-07T03:22:41.057", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:cisco:ios_xe:16.12.1:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C98DED36-D4B5-48D6-964E-EEEE97936700"}, {"criteria": "cpe:2.3:o:cisco:ios_xe:17.2:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7FBAAAE4-E771-40BC-8B58-AC2AA2DCD784"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:cisco:asr_902:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "70352B04-C3FD-47F5-A2F8-691CF63EB50D"}, {"criteria": "cpe:2.3:h:cisco:asr_903:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "51938C0A-AFDB-4B12-BB64-9C67FC0C738F"}, {"criteria": "cpe:2.3:h:cisco:asr_907:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "A18E4A46-10D3-48F8-9E92-377ACA447257"}], "operator": "OR"}], "operator": "AND"}], "sourceIdentifier": "ykramarz@cisco.com"}