CVE-2021-32635 – github.com/sylabs/singularity

Package

Manager: go
Name: github.com/sylabs/singularity
Vulnerable Version: >=3.7.2 <3.7.4

Severity

Level: Medium

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

EPSS: 0.00632 pctl0.69446

Details

Action Commands (run/shell/exec) Against Library URIs Ignore Configured Remote Endpoint ### Impact Due to incorrect use of a default URL, `singularity` action commands (`run`/`shell`/`exec`) specifying a container using a `library://` URI will always attempt to retrieve the container from the default remote endpoint (`cloud.sylabs.io`) rather than the configured remote endpoint. An attacker may be able to push a malicious container to the default remote endpoint with a URI that is identical to the URI used by a victim with a non-default remote endpoint, thus executing the malicious container. Only action commands (`run`/`shell`/`exec`) against `library://` URIs are affected. Other commands such as `pull` / `push` respect the configured remote endpoint. ### Patches All users should upgrade to Singularity 3.7.4 or later. A patch was applied at: https://github.com/sylabs/singularity/commit/d52ae9d13979733c5e987a566fae59ed6f1bf796 ### Workarounds Users who only interact with the default remote endpoint are not affected. Installations with an execution control list configured to restrict execution to containers signed with specific secure keys are not affected. ### For more information General questions about the impact of the advisory can be asked in the: - [SingularityCE Slack Channel](https://singularityce.slack.com) - [SingularityCE Mailing List](https://groups.google.com/g/singularity-ce) Any sensitive security concerns should be directed to: security@sylabs.io See our Security Policy here: https://sylabs.io/security-policy

Metadata

Created: 2021-06-01T21:21:01Z
Modified: 2023-01-10T16:08:38Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/06/GHSA-5mv9-q7fq-9394/GHSA-5mv9-q7fq-9394.json
CWE IDs: ["CWE-20"]
Alternative ID: GHSA-5mv9-q7fq-9394
Finding: F184
Auto approve: 1