Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linuxfoundation | Imgcrypt | < 1.1.4 |
| Fedoraproject | Fedora | 34 |
Related Weaknesses (CWE)
References
- https://github.com/containerd/imgcrypt/commit/6fdd9818a4d8142107b7ecd767d839c970PatchThird Party Advisory
- https://github.com/containerd/imgcrypt/issues/69ExploitIssue TrackingPatch
- https://github.com/containerd/imgcrypt/releases/tag/v1.1.4Release NotesThird Party Advisory
- https://github.com/containerd/imgcrypt/security/advisories/GHSA-8v99-48m9-c8pmPatchThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://github.com/containerd/imgcrypt/commit/6fdd9818a4d8142107b7ecd767d839c970PatchThird Party Advisory
- https://github.com/containerd/imgcrypt/issues/69ExploitIssue TrackingPatch
- https://github.com/containerd/imgcrypt/releases/tag/v1.1.4Release NotesThird Party Advisory
- https://github.com/containerd/imgcrypt/security/advisories/GHSA-8v99-48m9-c8pmPatchThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
FAQ
What is CVE-2022-24778?
CVE-2022-24778 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 i...
How severe is CVE-2022-24778?
CVE-2022-24778 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-24778?
Check the references section above for vendor advisories and patch information. Affected products include: Linuxfoundation Imgcrypt, Fedoraproject Fedora.