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[email protected]CVE-2021-40830

HistoryNov 23, 2021 - 12:15 a.m.

CVE-2021-40830

2021-11-2300:15:07

CWE-295

[email protected]

web.nvd.nist.gov

aws iot

device sdk

java

python

c++

node.js

trust store

bypass

security vulnerability

cve-2021-40830

nvd

tls handshake

5.8 Medium

CVSS2

Attack Vector

ADJACENT_NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

8.8 High

CVSS3

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

8.4 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

40.5%

JSON

The AWS IoT Device SDK v2 for Java, Python, C++ and Node.js appends a user supplied Certificate Authority (CA) to the root CAs instead of overriding it on Unix systems. TLS handshakes will thus succeed if the peer can be verified either from the user-supplied CA or the system’s default trust-store. Attackers with access to a host’s trust stores or are able to compromise a certificate authority already in the host’s trust store (note: the attacker must also be able to spoof DNS in this case) may be able to use this issue to bypass CA pinning. An attacker could then spoof the MQTT broker, and either drop traffic and/or respond with the attacker’s data, but they would not be able to forward this data on to the MQTT broker because the attacker would still need the user’s private keys to authenticate against the MQTT broker. The ‘aws_tls_ctx_options_override_default_trust_store_*’ function within the aws-c-io submodule has been updated to override the default trust store. This corrects this issue. This issue affects: Amazon Web Services AWS IoT Device SDK v2 for Java versions prior to 1.5.0 on Linux/Unix. Amazon Web Services AWS IoT Device SDK v2 for Python versions prior to 1.6.1 on Linux/Unix. Amazon Web Services AWS IoT Device SDK v2 for C++ versions prior to 1.12.7 on Linux/Unix. Amazon Web Services AWS IoT Device SDK v2 for Node.js versions prior to 1.5.3 on Linux/Unix. Amazon Web Services AWS-C-IO 0.10.4 on Linux/Unix.

Affected configurations

NVD

Node

amazonamazon_web_services_aws-c-ioMatch0.10.4

amazonamazon_web_services_internet_of_things_device_software_development_kit_v2Range<1.5.0java

amazonamazon_web_services_internet_of_things_device_software_development_kit_v2Range<1.5.3node.js

amazonamazon_web_services_internet_of_things_device_software_development_kit_v2Range<1.6.1python

amazonamazon_web_services_internet_of_things_device_software_development_kit_v2Range<1.12.7c\+\+

AND

linuxlinux_kernelMatch-

opengroupunixMatch-

CPENameOperatorVersion
amazon:amazon_web_services_aws-c-ioamazon amazon web services aws-c-ioeq0.10.4
amazon:amazon_web_services_internet_of_things_device_software_development_kit_v2amazon amazon web services internet of things device software development kit v2lt1.5.0
amazon:amazon_web_services_internet_of_things_device_software_development_kit_v2amazon amazon web services internet of things device software development kit v2lt1.5.3
amazon:amazon_web_services_internet_of_things_device_software_development_kit_v2amazon amazon web services internet of things device software development kit v2lt1.6.1
amazon:amazon_web_services_internet_of_things_device_software_development_kit_v2amazon amazon web services internet of things device software development kit v2lt1.12.7

CPE	Name	Operator	Version
amazon:amazon_web_services_aws-c-io	amazon amazon web services aws-c-io	eq	0.10.4
amazon:amazon_web_services_internet_of_things_device_software_development_kit_v2	amazon amazon web services internet of things device software development kit v2	lt	1.5.0
amazon:amazon_web_services_internet_of_things_device_software_development_kit_v2	amazon amazon web services internet of things device software development kit v2	lt	1.5.3
amazon:amazon_web_services_internet_of_things_device_software_development_kit_v2	amazon amazon web services internet of things device software development kit v2	lt	1.6.1
amazon:amazon_web_services_internet_of_things_device_software_development_kit_v2	amazon amazon web services internet of things device software development kit v2	lt	1.12.7

CNA Affected

[
  {
    "platforms": [
      "Linux/Unix"
    ],
    "product": "AWS IoT Device SDK v2 for Java ",
    "vendor": "Amazon Web Services",
    "versions": [
      {
        "lessThan": "1.5.0",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      }
    ]
  },
  {
    "platforms": [
      "Linux/Unix"
    ],
    "product": "AWS IoT Device SDK v2 for Python",
    "vendor": "Amazon Web Services",
    "versions": [
      {
        "lessThan": "1.6.1",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      }
    ]
  },
  {
    "platforms": [
      "Linux/Unix"
    ],
    "product": "AWS IoT Device SDK v2 for C++",
    "vendor": "Amazon Web Services",
    "versions": [
      {
        "lessThan": "1.12.7",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      }
    ]
  },
  {
    "platforms": [
      "Linux/Unix"
    ],
    "product": "AWS IoT Device SDK v2 for Node.js",
    "vendor": "Amazon Web Services",
    "versions": [
      {
        "lessThan": "1.5.3",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      }
    ]
  },
  {
    "platforms": [
      "Linux/Unix"
    ],
    "product": "AWS-C-IO",
    "vendor": "Amazon Web Services",
    "versions": [
      {
        "status": "affected",
        "version": "0.10.4"
      }
    ]
  }
]