#VU45988 Cryptographic issues in wolfSSL - CVE-2020-15309

Vulnerability identifier: #VU45988

Vulnerability risk: Low

CVSSv4.0: 0.4 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-15309

CWE-ID: CWE-310

Exploitation vector: Local

Exploit availability: No

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

Vendor: wolfSSL

Description

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists in wolfSSL when single precision is not employed. A local user can conduct a cache-timing attack against public key operations. These attackers may already have obtained sensitive information if the affected system has been used for private key operations (e.g., signing with a private key).

Mitigation
Install updates from vendor's website.

Vulnerable software versions

wolfSSL: 4.0 - 4.4.0

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External links
https://github.com/wolfSSL/wolfssl/releases/tag/v4.5.0-stable

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.