Vulnerability identifier: #VU59050

Vulnerability risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-44732

CWE-ID: CWE-415

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
mbed TLS
Universal components / Libraries / Libraries used by multiple products

Vendor: ARM

Description

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

The vulnerability exists due to a boundary error. A remote attacker can send a specially crafted request to the application, trigger a double free error and execute arbitrary code on the target system.

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

Mitigation
Install updates from vendor's website.

Vulnerable software versions

mbed TLS: 2.16.0 - 2.16.11, 2.27.0, 2.7.0 - 2.7.19, 2.26.0, 2.25.0, 2.24.0, 2.23.0, 2.22.0, 2.21.0, 2.20.0, 2.19.0 - 2.19.1, 2.18.0 - 2.18.1, 2.17.0, 2.15.0 - 2.15.1, 2.14.0 - 2.14.1, 2.13.0 - 2.13.1, 2.11.0, 2.10.0, 2.9.0, 2.6.0 - 2.6.1, 2.5.0 - 2.5.1, 2.4.0 - 2.4.2, 2.3.0, 2.2.0 - 2.2.1, 2.1.0 - 2.1.18, 2.0.0, 2.12.0, 2.8.0, 3.0.0

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External links
http://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2021-12

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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