| Vulnerability Name: | CVE-2021-32635 (CCN-202832) | ||||||||||||||||||||
| Assigned: | 2021-05-26 | ||||||||||||||||||||
| Published: | 2021-05-26 | ||||||||||||||||||||
| Updated: | 2022-04-22 | ||||||||||||||||||||
| Summary: | 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. | ||||||||||||||||||||
| CVSS v3 Severity: | 6.3 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L) 5.5 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C)
5.5 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C)
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| CVSS v2 Severity: | 6.8 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P)
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| Vulnerability Type: | CWE-Other CWE-20 CWE-923 | ||||||||||||||||||||
| Vulnerability Consequences: | Gain Access | ||||||||||||||||||||
| References: | Source: MITRE Type: CNA CVE-2021-32635 Source: XF Type: UNKNOWN singularity-cve202132635-code-exec(202832) Source: MISC Type: Third Party Advisory https://github.com/sylabs/singularity/releases/tag/v3.7.4 Source: CCN Type: singularity GIT Repository Action Commands (run/shell/exec) Against Library URIs Ignore Configured Remote Endpoint Source: CONFIRM Type: Third Party Advisory https://github.com/sylabs/singularity/security/advisories/GHSA-5mv9-q7fq-9394 Source: GENTOO Type: Third Party Advisory GLSA-202107-50 Source: CCN Type: WhiteSource Vulnerability Database CVE-2021-32635 | ||||||||||||||||||||
| Vulnerable Configuration: | Configuration 1: Configuration CCN 1:  Denotes that component is vulnerable | ||||||||||||||||||||
| Oval Definitions | |||||||||||||||||||||
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