Detections
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Alpine: multiple singularity packages: security update to 3.7.4-r0
medium Tenable Cloud Security Plugin ID 426105
Description
There are packages installed that are affected by a vulnerability referenced in the following CVE:- 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. (CVE-2021-32635)
See Also
Plugin Details
Severity: Medium
ID: 426105
Version: Revision 1.3
Type: Local
Published: 5/16/2025
Updated: 7/2/2026
Supported Sensors: Agentless Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security
Risk Information
VPR
Risk Factor: Low
Score: 2.8
Percentile: 22.22
CVSS v2
Risk Factor: Medium
Base Score: 6.8
Temporal Score: 5
Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P
CVSS Score Source: CVE-2021-32635
CVSS v3
Risk Factor: Medium
Base Score: 6.3
Temporal Score: 5.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
Exploit Ease: No known exploits are available
Vulnerability Publication Date: 5/28/2021
Reference Information
CVE: CVE-2021-32635