CVE-2019-20794
CVSS V2 Medium 4.7
CVSS V3 Medium 4.7
Description
An issue was discovered in the Linux kernel 4.18 through 5.6.11 when unprivileged user namespaces are allowed. A user can create their own PID namespace, and mount a FUSE filesystem. Upon interaction with this FUSE filesystem, if the userspace component is terminated via a kill of the PID namespace's pid 1, it will result in a hung task, and resources being permanently locked up until system reboot. This can result in resource exhaustion.
Overview
- CVE ID
- CVE-2019-20794
- Assigner
- cve@mitre.org
- Vulnerability Status
- Analyzed
- Published Version
- 2020-05-09T18:15:11
- Last Modified Date
- 2021-07-21T11:39:23
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 1 | OR | 4.18 | 5.6.11 |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:L/AC:M/Au:N/C:N/I:N/A:C
- Access Vector
- LOCAL
- Access Compatibility
- MEDIUM
- Authentication
- NONE
- Confidentiality Impact
- NONE
- Integrity Impact
- NONE
- Availability Impact
- COMPLETE
- Base Score
- 4.7
- Severity
- MEDIUM
- Exploitability Score
- 3.4
- Impact Score
- 6.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
- Attack Vector
- LOCAL
- Attack Compatibility
- HIGH
- Privileges Required
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- NONE
- Availability Impact
- HIGH
- Base Score
- 4.7
- Base Severity
- MEDIUM
- Exploitability Score
- 1
- Impact Score
- 3.6
References
| Reference URL | Reference Tags |
|---|---|
| https://github.com/sargun/fuse-example | Exploit Third Party Advisory |
| https://sourceforge.net/p/fuse/mailman/message/36598753/ | Exploit Third Party Advisory |
| https://security.netapp.com/advisory/ntap-20200608-0001/ | Third Party Advisory |
| http://www.openwall.com/lists/oss-security/2020/08/24/1 | Mailing List Third Party Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2019-20794 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-20794 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 16:10:08 | Added to TrackCVE | |||
| 2022-12-04 16:20:21 | 2020-05-09T18:15Z | 2020-05-09T18:15:11 | CVE Published Date | updated |
| 2022-12-04 16:20:21 | 2021-07-21T11:39:23 | CVE Modified Date | updated | |
| 2022-12-04 16:20:21 | Analyzed | Vulnerability Status | updated |