CVE-2021-28099

low-risk
Published 2021-03-23

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.

Do I need to act?

-
0.03% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
4
CVSS 4.4/10 Medium
LOCAL / LOW complexity

Affected Products (1)

Hollow

Affected Vendors

Netflix

References (2)

Third Party Advisory https://github.com/Netflix/security-bulletins/blob/master/advisories/nflx-2021-0...
Third Party Advisory https://github.com/Netflix/security-bulletins/blob/master/advisories/nflx-2021-0...
20
/ 100
low-risk
Severity 15/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal