CVE-2022-24778
Publication date 25 March 2022
Last updated 24 July 2024
Ubuntu priority
Cvss 3 Severity Score
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.
Status
Package | Ubuntu Release | Status |
---|---|---|
containerd | 24.04 LTS noble |
Not affected
|
22.04 LTS jammy |
Fixed 1.5.9-0ubuntu3.1
|
|
20.04 LTS focal |
Fixed 1.5.9-0ubuntu1~20.04.6
|
|
18.04 LTS bionic |
Fixed 1.5.9-0ubuntu1~18.04.2
|
|
16.04 LTS xenial |
Vulnerable
|
|
14.04 LTS trusty | Ignored end of standard support |
Severity score breakdown
Parameter | Value |
---|---|
Base score | 7.5 · High |
Attack vector | Network |
Attack complexity | Low |
Privileges required | None |
User interaction | None |
Scope | Unchanged |
Confidentiality | High |
Integrity impact | None |
Availability impact | None |
Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
References
Related Ubuntu Security Notices (USN)
- USN-5776-1
- containerd vulnerabilities
- 13 December 2022