Vulnerability · Published Mar 25, 2022 · Assigned by GitHub_M
CVE-2022-24778Incorrect Authorization in imgcrypt
High 7.5
In plain English
A high-severity incorrect authorization in imgcrypt from containerd. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 2.7% (higher than 86% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/containerd/imgcrypt | 1.1.4 | GHSA-8v99-48m9-c8pm |
| Go | github.com/containerd/imgcrypt | 1.1.4 | GO-2021-0412 |
| Ubuntu:22.04:LTS | containerd | 1.5.9-0ubuntu3.1 | USN-5776-1 |
| Ubuntu:22.04:LTS | containerd | 1.5.9-0ubuntu3.1 | UBUNTU-CVE-2022-24778 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| containerd | imgcrypt | < 1.1.4 |
Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
References
- https://github.com/containerd/imgcrypt/security/advisories/GHSA-8v99-48m9-c8pm x_refsource_CONFIRM
- https://github.com/containerd/imgcrypt/issues/69 x_refsource_MISC
- https://github.com/containerd/imgcrypt/commit/6fdd9818a4d8142107b7ecd767d839c9707700d9 x_refsource_MISC
- https://github.com/containerd/imgcrypt/releases/tag/v1.1.4 x_refsource_MISC
- FEDORA-2022-5f746c8e5b vendor-advisory, x_refsource_FEDORA
- FEDORA-2022-de0f8beeb0 vendor-advisory, x_refsource_FEDORA
- FEDORA-2022-d86c15bfb7 vendor-advisory, x_refsource_FEDORA