Vulnerability identifier: #VU34470

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-11713

CWE-ID: CWE-327

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
wolfSSL
Universal components / Libraries / Libraries used by multiple products

Vendor: wolfSSL

Description

The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.

wolfSSL 4.3.0 has mulmod code in wc_ecc_mulmod_ex in ecc.c that does not properly resist timing side-channel attacks.

Mitigation
Install update from vendor's website.

Vulnerable software versions

wolfSSL: 4.3.0

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External links
http://gist.github.com/pietroborrello/7c5be2d1dc15349c4ffc8671f0aad04f
http://github.com/wolfSSL/wolfssl/pull/2894/

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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.