id: GO-2022-0289
modules:
    - module: std
      versions:
        - fixed: 1.16.12
        - introduced: 1.17.0-0
          fixed: 1.17.5
      vulnerable_at: 1.17.4
      packages:
        - package: syscall
          symbols:
            - ForkExec
          skip_fix: 'TODO: revisit this reason (fix appears to not work with Go <1.18)'
summary: Misdirected I/O in syscall
description: |-
    When a Go program running on a Unix system is out of file descriptors and calls
    syscall.ForkExec (including indirectly by using the os/exec package),
    syscall.ForkExec can close file descriptor 0 as it fails. If this happens (or
    can be provoked) repeatedly, it can result in misdirected I/O such as writing
    network traffic intended for one connection to a different connection, or
    content intended for one file to a different one.

    For users who cannot immediately update to the new release, the bug can be
    mitigated by raising the per-process file descriptor limit.
published: 2022-05-18T18:23:23Z
cves:
    - CVE-2021-44717
credits:
    - Tomasz Maczukin
    - Kamil Trzciński of GitLab
references:
    - fix: https://go.dev/cl/370576
    - fix: https://go.googlesource.com/go/+/a76511f3a40ea69ee4f5cd86e735e1c8a84f0aa2
    - report: https://go.dev/issue/50057
    - web: https://groups.google.com/g/golang-announce/c/hcmEScgc00k
    - fix: https://go.dev/cl/370577
    - fix: https://go.dev/cl/370795