CVE-2023-39323

Arbitrary code execution during build via line directives in cmd/go

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.

8.1

CVSS

Severity: High

CVSS 3.1 •

EPSS 0.08%

Vendor Advisory go.dev

Affected: Go toolchain cmd/go

References

Link	Tags
https://go.dev/issue/63211	patch issue tracking
https://go.dev/cl/533215	patch
https://groups.google.com/g/golang-announce/c/XBa1oHDevAo	mailing list release notes
https://pkg.go.dev/vuln/GO-2023-2095	vendor advisory
https://security.netapp.com/advisory/ntap-20231020-0001/	third party advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KSEGD2IWKNUO3DWY4KQGUQM5BISRWHQE/	third party advisory mailing list
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CLB4TW7KALB3EEQWNWCN7OUIWWVWWCG2/	third party advisory mailing list
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XFOIBB4YFICHDM7IBOP7PWXW3FX4HLL2/	third party advisory mailing list
https://security.gentoo.org/glsa/202311-09	third party advisory

Frequently Asked Questions

What is the severity of CVE-2023-39323?: CVE-2023-39323 has been scored as a high severity vulnerability.
How to fix CVE-2023-39323?: To fix CVE-2023-39323, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-39323 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2023-39323 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-39323?: CVE-2023-39323 affects Go toolchain cmd/go.

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