6.3 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
LOW
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
6.8 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
0.002 Low
EPSS
Percentile
52.3%
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.
All users should upgrade to Singularity 3.7.4 or later.
A patch was applied at: https://github.com/sylabs/singularity/commit/d52ae9d13979733c5e987a566fae59ed6f1bf796
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.
General questions about the impact of the advisory can be asked in the:
Any sensitive security concerns should be directed to: [email protected]
See our Security Policy here: https://sylabs.io/security-policy
CPE | Name | Operator | Version |
---|---|---|---|
github.com/sylabs/singularity | ge | 3.7.2 | |
github.com/sylabs/singularity | lt | 3.7.4 |
github.com/hpcng/singularity/security/advisories/GHSA-jq42-hfch-42f3
github.com/sylabs/singularity
github.com/sylabs/singularity/commit/d52ae9d13979733c5e987a566fae59ed6f1bf796
github.com/sylabs/singularity/releases/tag/v3.7.4
github.com/sylabs/singularity/security/advisories/GHSA-5mv9-q7fq-9394
nvd.nist.gov/vuln/detail/CVE-2021-32635
security.gentoo.org/glsa/202107-50
6.3 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
LOW
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
6.8 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
0.002 Low
EPSS
Percentile
52.3%