Vulnerability identifier: #VU89221

Vulnerability risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-34447

CWE-ID: CWE-345

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
The Bouncy Castle Crypto Package For Java
Universal components / Libraries / Libraries used by multiple products

Vendor: Legion of the Bouncy Castle Inc.

Description

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to hostname verification is performed against a DNS-resolved IP address when endpoint identification is enabled in the BCJSSE and an SSL socket is not created with an explicit hostname. A remote attacker can bypass implemented security restrictions.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

The Bouncy Castle Crypto Package For Java: 1.0 - 1.77

---

External links
http://www.bouncycastle.org/releasenotes.html#1.78

---

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.