modules:
  - module: github.com/containers/storage
    versions:
      - fixed: 1.28.1
    packages:
      - package: github.com/containers/storage/pkg/archive
        symbols:
          - cmdStream
        derived_symbols:
          - ApplyLayer
          - ApplyUncompressedLayer
          - Archiver.CopyFileWithTar
          - Archiver.CopyWithTar
          - Archiver.TarUntar
          - Archiver.UntarPath
          - CopyResource
          - CopyTo
          - DecompressStream
          - IsArchivePath
          - Untar
          - UntarPath
          - UntarUncompressed
description: |
    Due to a goroutine deadlock, using github.com/containers/storage/pkg/archive.DecompressStream
    on a xz archive returns a reader which will hang indefinitely when Close is called. An attacker
    can use this to cause denial of service if they are able to cause the caller to attempt to
    decompress an archive they control.
published: 2021-07-28T18:08:05Z
cves:
  - CVE-2021-20291
ghsas:
  - GHSA-7qw8-847f-pggm
credit: Aviv Sasson (Palo Alto Networks)
references:
  - fix: https://github.com/containers/storage/pull/860
  - fix: https://github.com/containers/storage/commit/306fcabc964470e4b3b87a43a8f6b7d698209ee1
  - web: https://bugzilla.redhat.com/show_bug.cgi?id=1939485