Vulnerability identifier: #VU52774

Vulnerability 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-2021-27435

CWE-ID: CWE-190

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Mbed OS
Operating systems & Components / Operating system

Vendor: ARM

Description

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

The vulnerability exists due to integer overflow in malloc_wrapper function. 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 updates from vendor's website.

Vulnerable software versions

Mbed OS: 5.1.0 - 6.8.0

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External links
http://ics-cert.us-cert.gov/advisories/icsa-21-119-04
http://github.com/ARMmbed/mbed-os/pull/14408

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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.