#VU73721 Path traversal in Go programming language - CVE-2022-41722

Vulnerability identifier: #VU73721

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-41722

CWE-ID: CWE-22

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 directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences within the filepath.Clean() function on Windows, which can transform an invalid path such as "a/../c:/b" into the valid path "c:". As a result, an attacker can read arbitrary files on the system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Go programming language: 1.19 - 1.19.5, 1.20

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External links
http://pkg.go.dev/vuln/GO-2023-1568
http://go.dev/cl/468123
http://groups.google.com/g/golang-announce/c/V0aBFqaFs_E
http://go.dev/issue/57274

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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.