#VU12596 Buffer over-read in mbed TLS - CVE-2018-9988

Vulnerability identifier: #VU12596

Vulnerability risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

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

---

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

---

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.