Vulnerability identifier: #VU12596

Vulnerability risk: Low

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-9988

CWE-ID: CWE-126

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 cause DoS condition on the target system.

The weakness exists in ssl_parse_server_key_exchange() due to buffer over-read. A remote attacker can trigger memory corruption and cause the service to crash.

Mitigation
Update to versions 2.1.11, 2.7.2 or 2.8.0.

Vulnerable software versions

mbed TLS: 2.1.0 - 2.1.10, 2.7.0

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External links
http://tls.mbed.org/tech-updates/releases/mbedtls-2.8.0-2.7.2-and-2.1.11-released

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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.