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CVE-2021-28099
In Netflix OSS Hollow, since the Files.exists(parent) is run before creating the directories, an attacker can pre-create these directories…
Medium4.4EPSS 0.25%
- Published
- Updated
- Reserved
- Assigned by
- netflix
Description
In Netflix OSS Hollow, since the Files.exists(parent) is run before creating the directories, an attacker can pre-create these directories with wide permissions. Additionally, since an insecure source of randomness is used, the file names to be created can be deterministically calculated.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium4.4 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N |
- EPSS (exploitation in 30 days)
- 0.25% · top 83% of all CVEs (6 Nov 2026)
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The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.4.
Weakness
- Local Information Disclosure
- CWE-330 (opens in a new tab)All about CWE-330 and its CVEs
Affected products
Netflix OSS Hollow
- affected All versions
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Mavencom.netflix.hollow:hollowGHSA-9295-mhf3-v33m (opens in a new tab)
References (1)
- https://github.com/Netflix/security-bulletins/blob/master/advisories/nflx-2021-001.md (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-9295-mhf3-v33m (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2021-28099)Record last updated .