Vulnerability identifier: #VU65123

Vulnerability risk: Medium

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

CVE-ID: CVE-2022-34293

CWE-ID: CWE-254

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 attacker to perform DoS attack.

The vulnerability exists due to an implementation error in DTLS 1.0/1.2, which causes the return-routability check, intended to protect application against DoS attacks, to be wrongly skipped in a specific edge case. A remote attacker can perform a denial of service (DoS) attack by consuming excessive resources on the server.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

wolfSSL: 2.0.3 - 5.3.0

---

External links
http://github.com/wolfSSL/wolfssl/releases/tag/v5.4.0-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.