CVE-2023-39323 Arbitrary code execution during build via line directives in cmd/go

What is CVE-2023-39323?

CVE-2023-39323 is a high-severity code injection vulnerability in Fedoraproject Fedora, published on 5 Oct 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Line directives ("//line") can be used to bypass the restrictions on "//go:cgo_" directives, allowing blocked linker and compiler flags to be passed during compilation. This can result in unexpected execution of arbitrary code when running "go build". The line directive requires the absolute path of the file in which the directive lives, which makes exploiting this issue significantly more complex.

Which versions are affected by CVE-2023-39323?

2 open source packages ship an affected version, including golang and toolchain. It affects 2 products.

Products include Fedoraproject Fedora, Golang Go.

How do I fix CVE-2023-39323?

Upgrade golang to a fixed version for your release line: 1.20.9 or 1.21.2.

Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.

Is CVE-2023-39323 being exploited?

There is no known exploitation of CVE-2023-39323 in the wild and no public exploit code.

Other vulnerabilities in Fedoraproject Fedora

• CVE-2024-4577 PHP-CGI OS Command Injection Exploited Critical 9.8
• CVE-2021-39226 Grafana Authentication Bypass Exploited Critical 9.8
• CVE-2019-5544 VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow Exploited Critical 9.8
• CVE-2024-4947 Google Chromium V8 Type Confusion Exploited Critical 9.6
• CVE-2024-4671 Google Chromium Visuals Use-After-Free Exploited Critical 9.6

All Fedoraproject Fedora vulnerabilities

Sources

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

Also known as AZL-31107, AZL-37358, AZL-37389, AZL-52845, AZL-78984, AZL-98871 and 11 more.