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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2021-32635 Detail

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://github.com/sylabs/singularity/releases/tag/v3.7.4 Third Party Advisory 
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://github.com/sylabs/singularity/security/advisories/GHSA-5mv9-q7fq-9394 Third Party Advisory 
https://security.gentoo.org/glsa/202107-50 Third Party Advisory 
https://security.gentoo.org/glsa/202107-50 Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
NVD-CWE-Other Other cwe source acceptance level NIST  
CWE-20 Improper Input Validation GitHub, Inc.  
CWE-923 Improper Restriction of Communication Channel to Intended Endpoints GitHub, Inc.  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

6 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2021-32635
NVD Published Date:
05/28/2021
NVD Last Modified:
11/21/2024
Source:
GitHub, Inc.