Vulnerability identifier: #VU77573

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-2023-34462

CWE-ID: CWE-400

Exploitation vector: Network

Exploit availability: No

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

Vendor: Netty project

Description

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

The vulnerability exists due to application does not properly control consumption of internal resources if no idle timeout handler was configured. A remote attacker can send a client hello packet, which leads the server to buffer up to 16MB of data per connection and results in a denial of service condition.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Netty: 4.0.0 - 4.1.93

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External links
http://github.com/netty/netty/security/advisories/GHSA-6mjq-h674-j845

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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.