id: GO-2023-2095
modules:
    - module: cmd
      versions:
        - fixed: 1.20.9
        - introduced: 1.21.0-0
          fixed: 1.21.2
      vulnerable_at: 1.21.1
      packages:
        - package: cmd/go
summary: 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.
references:
    - report: https://go.dev/issue/63211
    - fix: https://go.dev/cl/533215
    - web: https://groups.google.com/g/golang-announce/c/XBa1oHDevAo
cve_metadata:
    id: CVE-2023-39323
    cwe: 'CWE 94: Improper Control of Generation of Code (''Code Injection'')'
    references:
        - https://security.netapp.com/advisory/ntap-20231020-0001/
        - https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KSEGD2IWKNUO3DWY4KQGUQM5BISRWHQE/
        - https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CLB4TW7KALB3EEQWNWCN7OUIWWVWWCG2/
        - https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XFOIBB4YFICHDM7IBOP7PWXW3FX4HLL2/