#VU73870 Infinite loop in Go programming language - CVE-2022-30634

Vulnerability identifier: #VU73870

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-30634

CWE-ID: CWE-835

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 infinite loop in crypto/rand on Windows when handling buffer larger than 1 << 32 - 1 bytes. A remote attacker can consume all available system resources and cause denial of service conditions.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Go programming language: 1.17 - 1.18.2

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External links
https://groups.google.com/g/golang-announce/c/TzIC9-t8Ytg/m/IWz5T6x7AAAJ
https://go.dev/cl/402257
https://go.googlesource.com/go/+/bb1f4416180511231de6d17a1f2f55c82aafc863
https://go.dev/issue/52561
https://pkg.go.dev/vuln/GO-2022-0477

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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.