Singularity
CVE-2021-33027
CRITICAL
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A04:2025 - Cryptographic Failures
ASVS 5.0
V11 - Cryptography Entropy requirements
|
| Impact | CVSS score of 9.8 (CRITICAL). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required. |
| Exploit ScenarioDerived | This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the critical-severity affected system. |
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Alert meAnalysisAI
Sylabs Singularity Enterprise through 1.6.2 has Insufficient Entropy in a nonce. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.
Affects your stack
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Technical ContextAI · show details
This vulnerability is classified under CWE-331. Sylabs Singularity Enterprise through 1.6.2 has Insufficient Entropy in a nonce. Affected products include: Sylabs Singularity. Version information: through 1.6.2.
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Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionNVD
Sylabs Singularity Enterprise through 1.6.2 has Insufficient Entropy in a nonce.
Threat Intelligence Overview
NVD
CVE.org
EPSS
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.
Affected Products (CPE)NVD
More in Singularity
View allAn issue was discovered in Singularity 3.1.0 to 3.2.0-rc2, a malicious user with local/network access to the host system
Sylabs Singularity 3.5.x and 3.6.x, and SingularityPRO before 3.5-8, has an Incorrect Check of a Function's Return Value
Singularity (an open source container platform) from version 3.1.1 through 3.6.3 has a vulnerability. Rated critical sev
Sylabs Singularity through 3.6.2 has Insecure Permissions on temporary directories used in explicit and implicit contain
Sylabs Singularity 3.2.0 through 3.6.2 has Insecure Permissions on temporary directories used in fakeroot or user namesp
Apptainer is an open source container platform for Linux. Rated high severity (CVSS 7.8), this vulnerability is low atta
Sylabs Singularity 2.4 to 2.6 allows local users to conduct Improper Input Validation attacks. Rated high severity (CVSS
Sylabs Singularity 3.0 through 3.5 lacks support for an Integrity Check. Rated high severity (CVSS 7.5), this vulnerabil
Sylabs Singularity 3.5.0 through 3.5.3 fails to report an error in a Status Code. Rated high severity (CVSS 7.5), this v
Sylabs Singularity 3.0 through 3.5 has Improper Validation of an Integrity Check Value. Rated high severity (CVSS 7.5),
Insecure permissions (777) are set on $HOME/.singularity when it is newly created by Singularity (version from 3.3.0 to
Singularity 2.3.0 through 2.5.1 is affected by an incorrect access control on systems supporting overlay file system. Ra
GitHub PoC
Exploit-DB