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HistoryOct 28, 2020 - 12:00 a.m.

Security Bulletin: AMI Baseboard Management Controller (BMC) Firmware Vulnerabilities in NVIDIA DGX-1, DGX-2, and DGX A100 Servers - October 2020

2020-10-2800:00:00

nvidia.custhelp.com

nvidia dgx servers

bmc firmware

vulnerabilities

security update

remote code execution

elevation of privileges

information disclosure

network access

firmware update

cve ids

cwe

cvss v3.1

ami bmc firmware

hard-coded credentials

administrative privileges

csrf vulnerability

cross-site request forgery

rc4 cipher key

snmp community strings.

CVSS2

7.8

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

NONE

Availability Impact

NONE

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

CVSS3

9.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.29

Percentile

97.0%

JSON

NVIDIA has released a firmware security update for NVIDIA DGX™ servers. This update addresses security issues in the AMI Baseboard Management Controller (BMC) firmware that may lead to remote code execution, elevation of privileges, or information disclosure. All issues require network access to the BMC of the DGX server. To protect your system, download and install this firmware update through the NVIDIA Enterprise Support Portal. Go to NVIDIA Product Security.

Details

This section summarizes the potential impact that this security update addresses. Descriptions use CWE™, and base scores and vectors use CVSS v3.1 standards.

CVE IDs	Description	Base Score	Vector
CVE‑2020‑11483	NVIDIA DGX servers contain a vulnerability in the AMI BMC firmware in which the firmware includes hard-coded credentials, which may lead to elevation of privileges or information disclosure.	9.8	AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVE‑2020‑11484	NVIDIA DGX servers contain a vulnerability in the AMI BMC firmware in which an attacker with administrative privileges can obtain the hash of the BMC/IPMI user password, which may lead to information disclosure.	8.4	AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVE‑2020‑11487	NVIDIA DGX servers contain a vulnerability in the AMI BMC firmware in which the use of a hard-coded RSA 1024 key with weak ciphers may lead to information disclosure.	8.2	AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
CVE‑2020‑11485	NVIDIA DGX servers contain a Cross-Site Request Forgery (CSRF) vulnerability in the AMI BMC firmware in which the web application does not sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request, which can lead to information disclosure or code execution.	8.1	AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
CVE‑2020‑11486	NVIDIA DGX servers contain a vulnerability in the AMI BMC firmware in which software allows an attacker to upload or transfer files that can be automatically processed within the product’s environment, which may lead to remote code execution.	8.1	AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
CVE‑2020‑11615	NVIDIA DGX servers contain a vulnerability in the AMI BMC firmware in which it uses a hard-coded RC4 cipher key, which may lead to information disclosure.	7.5	AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVE‑2020‑11488	NVIDIA DGX servers contain a vulnerability in the AMI BMC firmware in which software does not validate the RSA 1024 public key used to verify the firmware signature, which may lead to information disclosure or code execution.	6.7	AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CVE‑2020‑11489	NVIDIA DGX servers contain a vulnerability in the AMI BMC firmware in which default SNMP community strings are used, which may lead to information disclosure.	6.5	AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
CVE‑2020‑11616	NVIDIA DGX servers contain a vulnerability in the AMI BMC firmware in which the Pseudo-Random Number Generator (PRNG) algorithm used in the JSOL package that implements the IPMI protocol is not cryptographically strong, which may lead to information disclosure.	2.9	AV:A/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N

The NVIDIA risk assessment is based on an average of risk across a diverse set of installed systems and may not represent the true risk to your local installation. NVIDIA recommends consulting a security or IT professional to evaluate the risk to your specific configuration.

Security Updates

The following table lists the NVIDIA software products affected, versions affected, and the updated version that includes this security update. Download the updates from NVIDIA Enterprise Support Portal.

CVE IDs Addressed	Hardware Platform	System	Affected Versions	Updated Version
CVE‑2020‑11483	NVIDIA DGX servers	DGX-1	All BMC firmware versions prior to 3.38.30

BMC firmware 3.38.30

BMC firmware 3.38.30

Notes

Upgrade to the NVIDIA DGX-1 firmware container nvfw-dgx1:20.10.2, NVIDIA DGX-2 firmware container nvfw-dgx2:20.10.7, or NVIDIA DGX A100 firmware container nvfw-dgxa100:20.10.9 to get the updated BMC firmware and SBIOS version listed in the table above. Firmware updates are available through the NVIDIA Enterprise Support Portal.
NVIDIA is aware of CVE-2013-4786, which can be mitigated by placing the IPMI management port on a dedicated management LAN or VLAN restricted to trusted administrators to limit connectivity to the BMC, including the web user interface. See Section 12.1.1 in DGX A100 System User Guide (PDF).

Mitigations

To mitigate the security concerns in this bulletin, limit connectivity to the BMC, including the web user interface, to trusted management networks. See Security Updates for the version to install.

Acknowledgements

NVIDIA thanks following individuals for reporting the issues.

CVE‑2020‑11483, CVE‑2020‑11487, CVE‑2020‑11489: Sergey Gordeychik
CVE‑2020‑11484: Roman Palkin and Sergey Gordeychik
CVE‑2020‑11485: Maria Samoylova, Denis Kolegov, and Roman Palkin
CVE‑2020‑11615, CVE‑2020‑11616: Denis Kolegov and Sergey Gordeychik
CVE‑2020‑11486, CVE‑2020‑11488: Sergey Gordeychik, Maria Samoylova, Denis Kolegov, and Roman Palkin