CVE-2023-45284 Incorrect detection of reserved device names on Windows in path/filepath

What is CVE-2023-45284?

CVE-2023-45284 is a medium-severity path traversal vulnerability in Golang Go, published on 9 Nov 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

On Windows, The IsLocal function does not correctly detect reserved device names in some cases. Reserved names followed by spaces, such as "COM1 ", and reserved names "COM" and "LPT" followed by superscript 1, 2, or 3, are incorrectly reported as local. With fix, IsLocal now correctly reports these names as non-local.

Which versions are affected by CVE-2023-45284?

2 open source packages ship an affected version, including golang and stdlib. It affects 1 product.

Products include Golang Go.

How do I fix CVE-2023-45284?

Upgrade golang to a fixed version for your release line: 1.20.11 or 1.21.4.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2023-45284 being exploited?

There is no known exploitation of CVE-2023-45284 in the wild and no public exploit code.

Other vulnerabilities in Golang Go

• CVE-2020-0601 Microsoft Windows CryptoAPI Spoofing Exploited High 8.1
• CVE-2026-27143 Missing bound checks can lead to memory corruption in safe Go in cmd/compile Critical 9.8
• CVE-2024-24790 Unexpected behavior from Is methods for IPv4-mapped IPv6 addresses in net/netip Critical 9.8
• CVE-2023-39320 Arbitrary code execution via go.mod toolchain directive in cmd/go Critical 9.8
• CVE-2023-24540 Improper handling of JavaScript whitespace in html/template Critical 9.8

All Golang Go vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-37425, AZL-37513, AZL-78944, AZL-98742, BIT-golang-2023-45284, DEBIAN-CVE-2023-45284 and 4 more.