CVE-2021-32635
Singularity Library URI Unauthorized Container Execution Vulnerability
Description
Singularity is an open source container platform. In verions 3.7.2 and 3.7.3, Dde 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. The vulnerability is patched in Singularity version 3.7.4. Two possible workarounds exist: Users can only interact with the default remote endpoint, or an installation can have an execution control list configured to restrict execution to containers signed with specific secure keys.
INFO
Published Date :
May 28, 2021, 9:15 p.m.
Last Modified :
April 22, 2022, 4:19 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.4
Exploitability Score :
2.8
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-32635
.
URL | Resource |
---|---|
https://github.com/sylabs/singularity/releases/tag/v3.7.4 | Third Party Advisory |
https://github.com/sylabs/singularity/security/advisories/GHSA-5mv9-q7fq-9394 | Third Party Advisory |
https://security.gentoo.org/glsa/202107-50 | Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-32635
vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-32635
vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Modified Analysis by [email protected]
Apr. 22, 2022
Action Type Old Value New Value Changed Reference Type https://security.gentoo.org/glsa/202107-50 No Types Assigned https://security.gentoo.org/glsa/202107-50 Third Party Advisory -
CVE Modified by [email protected]
Jul. 22, 2021
Action Type Old Value New Value Added Reference https://security.gentoo.org/glsa/202107-50 [No Types Assigned] -
Initial Analysis by [email protected]
Jun. 10, 2021
Action Type Old Value New Value Added CVSS V2 Metadata Victim must voluntarily interact with attack mechanism Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:P/I:P/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L Changed Reference Type https://github.com/sylabs/singularity/releases/tag/v3.7.4 No Types Assigned https://github.com/sylabs/singularity/releases/tag/v3.7.4 Third Party Advisory Changed Reference Type https://github.com/sylabs/singularity/security/advisories/GHSA-5mv9-q7fq-9394 No Types Assigned https://github.com/sylabs/singularity/security/advisories/GHSA-5mv9-q7fq-9394 Third Party Advisory Added CWE NIST NVD-CWE-Other Added CPE Configuration OR *cpe:2.3:a:sylabs:singularity:3.7.2:*:*:*:*:*:*:* *cpe:2.3:a:sylabs:singularity:3.7.3:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Jun. 07, 2021
Action Type Old Value New Value Changed Description ### 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. ### 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: [email protected] See our Security Policy here: https://sylabs.io/security-policy Singularity is an open source container platform. In verions 3.7.2 and 3.7.3, Dde 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. The vulnerability is patched in Singularity version 3.7.4. Two possible workarounds exist: Users can only interact with the default remote endpoint, or an installation can have an execution control list configured to restrict execution to containers signed with specific secure keys. Added Reference https://github.com/sylabs/singularity/releases/tag/v3.7.4 [No Types Assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-32635
is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-32635
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.24 }} 0.07%
score
0.64762
percentile