CVE-2021-28099

CVSS V2 Low 3.6 CVSS V3 Medium 4.4

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.

Overview

CVE ID
CVE-2021-28099

Assigner
security-report@netflix.com

Vulnerability Status
Analyzed

Published Version
2021-03-23T21:15:13

Last Modified Date
2021-03-26T20:16:57

Weakness Enumerations

CWE	URL
NVD-CWE-noinfo	http://cwe.mitre.org/data/definitions/NVD-noinfo.html

CPE Configuration (Product)

CPE	Vulnerable	Operator	Version Start	Version End
cpe:2.3:a:netflix:hollow:-:::::::*	1	OR

CVSS Version 2

Version
2.0

Vector String
AV:L/AC:L/Au:N/C:P/I:P/A:N

Access Vector
LOCAL

Access Compatibility
LOW

Authentication
NONE

Confidentiality Impact
PARTIAL

Integrity Impact
PARTIAL

Availability Impact
NONE

Base Score
3.6

Severity
LOW

Exploitability Score
3.9

Impact Score
4.9

CVSS Version 3

Version
3.1

Vector String
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Attack Vector
LOCAL

Attack Compatibility
LOW

Privileges Required
LOW

User Interaction
NONE

Scope
UNCHANGED

Confidentiality Impact
LOW

Availability Impact
NONE

Base Score
4.4

Base Severity
MEDIUM

Exploitability Score
1.8

Impact Score
2.5

References

Reference URL	Reference Tags
https://github.com/Netflix/security-bulletins/blob/master/advisories/nflx-2021-001.md	Third Party Advisory

Sources

Source Name	Source URL
NIST	https://nvd.nist.gov/vuln/detail/CVE-2021-28099
MITRE	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-28099

History

Created	Old Value	New Value	Data Type	Notes
2022-05-10 07:18:29				Added to TrackCVE
2022-12-06 00:15:46	2021-03-23T21:15Z	2021-03-23T21:15:13	CVE Published Date	updated
2022-12-06 00:15:46		2021-03-26T20:16:57	CVE Modified Date	updated
2022-12-06 00:15:46		Analyzed	Vulnerability Status	updated