Multiple vulnerabilities in ESP-IDF

1) Integer overflow

EUVDB-ID: #VU52768

Risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-31571

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to integer overflow in queue.c for queue creation. A remote attacker can pass specially crafted data to the application, trigger integer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

ESP-IDF: 4.0 - 4.0.2

External links

http://github.com/espressif/esp-idf/releases/tag/v4.0.3

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Improper access control

EUVDB-ID: #VU53578

Risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-26555

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a local attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions within the Bluetooth legacy BR/EDR PIN code pairing. An attacker with physical access can spoof the BD_ADDR of the peer device and complete pairing without knowledge of the PIN.

Mitigation

Install update from vendor's website.

Vulnerable software versions

ESP-IDF: 4.0 - 4.0.2

External links

http://github.com/espressif/esp-idf/releases/tag/v4.0.3

Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Security features bypass

EUVDB-ID: #VU53579

Risk: Low

CVSSv3.1: 4.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-26558

CWE-ID: CWE-254 - Security Features

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to an impersonation in the Passkey Entry protocol flaw. A remote attacker on the local network can perform a man-in-the-middle (MITM) attack and impersonate the initiating device without any previous knowledge.

Note: This vulnerability affects the following specifications:

• BR/EDR Secure Simple Pairing in Bluetooth Core Specifications 2.1 through 5.2
• BR/EDR Secure Connections Pairing in Bluetooth Core Specifications 4.1 through 5.2 
• LE Secure Connections Pairing in Bluetooth Core Specifications 4.2 through 5.2

Mitigation

Install update from vendor's website.

Vulnerable software versions

ESP-IDF: 4.0 - 4.0.2

External links

http://github.com/espressif/esp-idf/releases/tag/v4.0.3

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

4) Improper Authentication

EUVDB-ID: #VU53581

Risk: Low

CVSSv3.1: 3.1 [CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-26556

CWE-ID: CWE-287 - Improper Authentication

Exploit availability: No

Description

The vulnerability allows a local attacker to bypass authentication process.

The vulnerability exists due to a flaw in the authentication protocol. An attacker with physical access can identify the AuthValue used before the provisioning procedure times out, complete the provisioning operation and obtain a NetKey.

Mitigation

Install update from vendor's website.

Vulnerable software versions

ESP-IDF: 3.0 - 4.0.2

External links

http://github.com/espressif/esp-idf/releases/tag/v4.0.3
http://github.com/espressif/esp-idf/releases/tag/v3.3.6

Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

5) Improper access control

EUVDB-ID: #VU53585

Risk: Low

CVSSv3.1: 4.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-26560

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a local attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to an impersonation in the Mesh Provisioning procedure flaw. A remote attacker on the local network can spoof a device being provisioned, authenticate without the AuthValue and perform any operation permitted to a node provisioned on the subnet.

Mitigation

Install update from vendor's website.

Vulnerable software versions

ESP-IDF: 3.0 - 4.0.2

External links

http://github.com/espressif/esp-idf/releases/tag/v4.0.3
http://github.com/espressif/esp-idf/releases/tag/v3.3.6

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

6) Security features bypass

EUVDB-ID: #VU53583

Risk: Low

CVSSv3.1: 4.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-26559

CWE-ID: CWE-254 - Security Features

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to the leak of AuthValue in the Mesh Provisioning procedure. A remote attacker on the local network can perform a brute-force attack to identify the AuthValue used given the Provisioner’s public key, and the confirmation number and nonce provided by the provisioning device.

Mitigation

Install update from vendor's website.

Vulnerable software versions

ESP-IDF: 3.0 - 4.0.2

External links

http://github.com/espressif/esp-idf/releases/tag/v4.0.3
http://github.com/espressif/esp-idf/releases/tag/v3.3.6

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

7) Security features bypass

EUVDB-ID: #VU53582

Risk: Low

CVSSv3.1: 4.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-26557

CWE-ID: CWE-254 - Security Features

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to the use of predictable AuthValue in the Mesh Provisioning procedure. A remote attacker on the local network can perform a brute-force attack to obtain the AuthValue and authenticate to both the Provisioner and provisioned devices.

Mitigation

Install update from vendor's website.

Vulnerable software versions

ESP-IDF: 3.0 - 4.0.2

External links

http://github.com/espressif/esp-idf/releases/tag/v4.0.3
http://github.com/espressif/esp-idf/releases/tag/v3.3.6

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

8) Time-of-check Time-of-use (TOCTOU) Race Condition

EUVDB-ID: #VU54288

Risk: Low

CVSSv3.1: 2.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-27926

CWE-ID: CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition

Exploit availability: No

Description

The vulnerability allows a local user to disable data encryption.

The vulnerability exists due to a potential physical access TOCTOU attack that can be used to remove encrypted partition flag in partition table. A local user can disable encryption and gain access to sensitive information.

Mitigation

Install update from vendor's website.

Vulnerable software versions

ESP-IDF: 4.0 - 4.0.2

External links

http://github.com/espressif/esp-idf/releases/tag/v4.0.3

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.