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: 3.0 - 4.2.1

External links

http://github.com/espressif/esp-idf/releases/tag/v4.2.2
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 Internet.

Is there known malware, which exploits this vulnerability?

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

2) 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: 3.0 - 4.2.1

External links

http://github.com/espressif/esp-idf/releases/tag/v4.2.2
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.

3) 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: 3.0 - 4.2.1

External links

http://github.com/espressif/esp-idf/releases/tag/v4.2.2
http://github.com/espressif/esp-idf/releases/tag/v3.3.6

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.