module: github.com/containerd/imgcrypt
package: github.com/containerd/imgcrypt/images/encryption
versions:
  - fixed: v1.1.4
description: |
    The imgcrypt library provides API exensions for containerd to
    support encrypted container images and implements the ctd-decoder
    command line tool for use by containerd to decrypt encrypted
    container images. The imgcrypt function `CheckAuthorization`
    is supposed to check whether the current used is authorized to
    access an encrypted image and prevent the user from running an
    image that another user previously decrypted on the same system.
    In versions prior to 1.1.4, a failure occurs when an image with
    a ManifestList is used and the architecture of the local host
    is not the first one in the ManifestList. Only the first
    architecture in the list was tested, which may not have its
    layers available locally since it could not be run on the host
    architecture. Therefore, the verdict on unavailable layers was
    that the image could be run anticipating that image run failure
    would occur later due to the layers not being available. However,
    this verdict to allow the image to run enabled other architectures
    in the ManifestList to run an image without providing keys if
    that image had previously been decrypted. A patch has been
    applied to imgcrypt 1.1.4. Workarounds may include usage of
    different namespaces for each remote user.
cves:
  - CVE-2022-24778
credit: '@dimitar-dimitrow'
symbols:
  - cryptManifestList
links:
    commit: https://github.com/containerd/imgcrypt/commit/6fdd9818a4d8142107b7ecd767d839c9707700d9
    context:
      - https://github.com/containerd/imgcrypt/issues/69
      - https://github.com/containerd/imgcrypt/releases/tag/v1.1.4
      - https://github.com/containerd/imgcrypt/security/advisories/GHSA-8v99-48m9-c8pm