Multiple vulnerabilities in wolfSSL

Published: 2021-11-02

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	N/A
CWE-ID	CWE-20 CWE-295
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	wolfSSL Universal components / Libraries / Libraries used by multiple products
Vendor	wolfSSL

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Input validation error

EUVDB-ID: #VU57852

Risk: Low

CVSSv3.1: 3.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input when a specific q value is used in a maliciously crafted key while generating DSA signature. A remote attacker can pass specially crafted DSA key to the application and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

wolfSSL: 4.0 - 4.8.1

External links

http://github.com/wolfSSL/wolfssl/releases/tag/v5.0.0-stable

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.

2) Improper Certificate Validation

EUVDB-ID: #VU57853