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No exploitation reportedFix available

CVE-2021-29499

No exploitation reported by the sources we read.

  • Published2021-05-07
  • Fixed in1.2.3
  • WeaknessCWE-330

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

SIF is an open source implementation of the Singularity Container Image Format. The `siftool new` command and func siftool.New() produce predictable UUID identifiers due to insecure randomness in the version of the `github.com/satori/go.uuid` module used as a dependency. A patch is available in version >= v1.2.3 of the module. Users are encouraged to upgrade. As a workaround, users passing CreateInfo struct should ensure the `ID` field is generated using a version of `github.com/satori/go.uuid` that is not vulnerable to this issue.

Timeline

dates in UTC
  1. 2021-05-0721:15CVE publishedNVD

Versions per branch

NVD · OSV
Sylabs singularity image format
BranchAffectedFixed in
1.2< 1.2.31.2.3

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

  • golang-github-sylabs-sifUbuntu:Pro:26.04:LTSall versions · no fixed version listed
  • golang-github-sylabs-sifUbuntu:26.10all versions · no fixed version listed
  • golang-github-sylabs-sifUbuntu:24.04:LTSall versions · no fixed version listed
  • golang-github-sylabs-sifUbuntu:22.04:LTSall versions · no fixed version listed
  • golang-github-sylabs-sifUbuntu:20.04:LTSall versions · no fixed version listed
  • golang-github-sylabs-sifDebian:14all versions · fixed in 2.3.1-2
  • golang-github-sylabs-sifDebian:13all versions · fixed in 2.3.1-2
  • golang-github-sylabs-sifDebian:12all versions · fixed in 2.3.1-2

4 more package ranges on OSV.dev

Full record on NVD

Fix

  1. Update Sylabs singularity image format to 1.2.3

Detection

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

Sources

  • CNACVSS 3.17.5known since 2026-10-23
  • NVDCVSS 3.17.5read 2026-10-23
  • NVDCVSS 2.04read 2026-10-23
  • CNAweakness (CWE)CWE-330known since 2026-10-23
  • FIRST EPSSEPSS score1.0 %2026-11-08
  • OSVaffected packages—
  • GitHub AdvisoriesadvisoryHIGH2021-05-07

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published
2021-05-07
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-4gh8-x3vv-phhg

Frequently asked questions

What is CVE-2021-29499?

SIF is an open source implementation of the Singularity Container Image Format. The `siftool new` command and func siftool.New() produce predictable UUID identifiers due to insecure randomness in the version of the `github.com/satori/go.uuid` module used as a dependency. A patch is available in version >= v1.2.3 of the module. Users are encouraged to upgrade. As a workaround, users passing CreateInfo struct should ensure the `ID` field is generated using a version of `github.com/satori/go.uuid` that is not vulnerable to this issue.

Is CVE-2021-29499 actively exploited?

Active exploitation of CVE-2021-29499 has not been confirmed. Its EPSS score was 1.0% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-29499?

CVE-2021-29499 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

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