#VU10943 Remote code execution in mbed TLS - CVE-2018-0488

Vulnerability identifier: #VU10943

Vulnerability risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2018-0488

CWE-ID: CWE-20

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 unauthenticated attacker to execute arbitrary code on the target system.

The weakness exists due to improper processing of crafted packets when using the truncated HMAC extension and CBC. A remote attacker can send a specially crafted input and execute arbitrary code.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation
Update to versions 1.3.22, 2.1.10 or 2.7.0.

Vulnerable software versions

mbed TLS: 1.3.0 - 1.3.21, 2.1.0 - 2.1.9, 2.4.0 - 2.4.2

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External links
https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2018-01

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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.