Vulnerability identifier: #VU72685

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-2022-41724

CWE-ID: CWE-399

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Go programming language
Universal components / Libraries / Scripting languages

Vendor: Google

Description

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

The vulnerability exists due to improper management of internal resources in crypto/tls when handling large TLS handshake records. A remote attacker can send specially crafted data to the application and perform a denial of service (DoS) attack.

The vulnerability affects all TLS 1.3 clients, TLS 1.2 clients which explicitly enable session resumption (by setting Config.ClientSessionCache to a non-nil value), and TLS 1.3 servers which request client certificates (by setting Config.ClientAuth >= RequestClientCert).

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Go programming language: 1.20, 1.1 - 1.19.5, 1.18 - 1.18.10, 1.17 - 1.17.13, 1.16 - 1.16.15, 1.15 - 1.15.15, 1.14 - 1.14.15, 1.13 - 1.13.15, 1.12 - 1.12.17, 1.11 - 1.11beta3, 1.10 - 1.10.8, 1.9 - 1.9.7, 1.8 - 1.8.7, 1.7 - 1.7.6, 1.6 - 1.6.4, 1.5 - 1.5.4, 1.4 - 1.4.3, 1.3 - 1.3.3, 1.2 - 1.2.2, 1.0 - 1.0.3

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External links
http://groups.google.com/g/golang-announce/c/V0aBFqaFs_E
http://pkg.go.dev/vuln/GO-2023-1570
http://go.dev/cl/468125
http://go.dev/issue/58001

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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.