Predictable SIF UUID Identifiers
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.
Summary
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.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| sylabs | sif | up to 1.2.2 | — | No fix listed | CNA |
| — | github.com/sylabs/sif (Go) | before 1.2.3 | 1.2.3 | Patch available | GHSA-4gh8-x3vv-phhg |
- sif Vendorsylabs Affected up to 1.2.2 Fixed in — No fix listed CNA
- github.com/sylabs/sif (Go) Vendor— Affected before 1.2.3 Fixed in 1.2.3 Patch available GHSA-4gh8-x3vv-phhg
Remediation
- Fix · GHSA-4gh8-x3vv-phhg github.com/sylabs/sif (Go) Fixed in 1.2.3 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2021-29499
- 2026-10-03 Alias added: GHSA-4gh8-x3vv-phhg
References
More sylabs Singularity Image Format vulnerabilities
- TI-2022-18614 Digital Signature Hash Algorithms Not Validated in sylabs/sif CVSS 3.1CRITICAL 9.8
Sources
- CVE-2021-29499 · CVE Program
- CVE-2021-29499 · NVD
- FIRST EPSS
- GHSA-4gh8-x3vv-phhg · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences