CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:S/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
56.3%
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 macOS systems. Additionally, SNI validation is also not enabled when the CA has been βoverriddenβ. TLS handshakes will thus succeed if the peer can be verified either from the user-supplied CA or the systemβs default trust-store. Attackers with access to a hostβs trust stores or are able to compromise a certificate authority already in the hostβs 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 attackerβs data, but they would not be able to forward this data on to the MQTT broker because the attacker would still need the userβs 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 address this behavior. This issue affects: Amazon Web Services AWS IoT Device SDK v2 for Java versions prior to 1.5.0 on macOS. Amazon Web Services AWS IoT Device SDK v2 for Python versions prior to 1.7.0 on macOS. Amazon Web Services AWS IoT Device SDK v2 for C++ versions prior to 1.14.0 on macOS. Amazon Web Services AWS IoT Device SDK v2 for Node.js versions prior to 1.6.0 on macOS. Amazon Web Services AWS-C-IO 0.10.7 on macOS.
Vendor | Product | Version | CPE |
---|---|---|---|
* | awsiotsdk | * | cpe:2.3:a:*:awsiotsdk:*:*:*:*:*:*:*:* |
microsoft | azure_iot_hub_device_client_sdk | * | cpe:2.3:a:microsoft:azure_iot_hub_device_client_sdk:*:*:*:*:*:*:*:* |
software.amazon.awssdk.iotdevicesdk | aws-iot-device-sdk | * | cpe:2.3:a:software.amazon.awssdk.iotdevicesdk:aws-iot-device-sdk:*:*:*:*:*:*:*:* |
github.com/advisories/GHSA-j3f7-7rmc-6wqj
github.com/aws/aws-iot-device-sdk-cpp-v2
github.com/aws/aws-iot-device-sdk-java-v2
github.com/aws/aws-iot-device-sdk-java-v2/commit/46375e9b1bfb34109b9ff3b1eff9c770f9daa186
github.com/aws/aws-iot-device-sdk-js-v2
github.com/aws/aws-iot-device-sdk-js-v2/commit/22f1989f5bdb0bdd9c912a5a2d255ee6c0854f68
github.com/aws/aws-iot-device-sdk-python-v2
github.com/aws/aws-iot-device-sdk-python-v2/commit/5aef82573202309063eb540b72cee0e565f85a2d
github.com/awslabs/aws-c-io
github.com/pypa/advisory-database/tree/main/vulns/awsiotsdk/PYSEC-2021-864.yaml
nvd.nist.gov/vuln/detail/CVE-2021-40831
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:S/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
56.3%