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No exploitation reportedFix available

CVE-2018-12021

No exploitation reported by the sources we read.

  • Published2018-07-05
  • Fixed in2.5.2
  • WeaknessCWE-200

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Singularity 2.3.0 through 2.5.1 is affected by an incorrect access control on systems supporting overlay file system. When using the overlay option, a malicious user may access sensitive information by exploiting a few specific Singularity features.

Timeline

dates in UTC
  1. 2018-07-0518:29CVE publishedNVD

Versions per branch

OSV · NVD
hpcng/singularity
BranchAffectedFixed in
2.x≥ 2.3.0, < 2.5.22.5.2
Sylabs singularity
BranchAffectedFixed in
2.x≥ 2.3.0, ≤ 2.5.1no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • singularitySUSE:Package Hub 12 SP3all versions · fixed in 2.3.2-11.1
  • singularitySUSE:Package Hub 12 SP3all versions · fixed in 2.6.1-14.1
  • singularityopenSUSE:Tumbleweedall versions · fixed in 3.8.3-1.2
  • singularity-containerUbuntu:Pro:18.04:LTSall versions · fixed in 2.4.2-4ubuntu0.1~esm1

Full record on NVD

Fix

  1. Update hpcng/singularity to 2.5.2

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • NVDCVSS 3.06.5read 2026-10-23
  • NVDCVSS 2.06.8read 2026-10-23
  • NVDweakness (CWE)CWE-200read 2026-10-23
  • FIRST EPSSEPSS score1.5 %2026-11-08
  • OSVaffected packages—
  • GitHub AdvisoriesadvisoryMODERATE2023-07-22

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Published
2018-07-05
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-4x32-h296-rg6j

Frequently asked questions

What is CVE-2018-12021?

Singularity 2.3.0 through 2.5.1 is affected by an incorrect access control on systems supporting overlay file system. When using the overlay option, a malicious user may access sensitive information by exploiting a few specific Singularity features.

Is CVE-2018-12021 actively exploited?

Active exploitation of CVE-2018-12021 has not been confirmed. Its EPSS score was 1.5% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2018-12021?

CVE-2018-12021 has a CVSS v3 base score of 6.5 (MEDIUM severity), with vector string CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

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