CVE-2019-15793
CVSS V2 Medium 4.6
CVSS V3 High 8.8
Description
In shiftfs, a non-upstream patch to the Linux kernel included in the Ubuntu 5.0 and 5.3 kernel series, several locations which shift ids translate user/group ids before performing operations in the lower filesystem were translating them into init_user_ns, whereas they should have been translated into the s_user_ns for the lower filesystem. This resulted in using ids other than the intended ones in the lower fs, which likely did not map into the shifts s_user_ns. A local attacker could use this to possibly bypass discretionary access control permissions.
Overview
- CVE ID
- CVE-2019-15793
- Assigner
- security@ubuntu.com
- Vulnerability Status
- Analyzed
- Published Version
- 2020-04-24T00:15:11
- Last Modified Date
- 2020-05-01T14:48:27
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:5.0:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:linux:linux_kernel:5.3:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* | 1 | OR | ||
| cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:* | 1 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:L/AC:L/Au:N/C:P/I:P/A:P
- Access Vector
- LOCAL
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- PARTIAL
- Integrity Impact
- PARTIAL
- Availability Impact
- PARTIAL
- Base Score
- 4.6
- Severity
- MEDIUM
- Exploitability Score
- 3.9
- Impact Score
- 6.4
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- Attack Vector
- LOCAL
- Attack Compatibility
- LOW
- Privileges Required
- LOW
- User Interaction
- NONE
- Scope
- CHANGED
- Confidentiality Impact
- HIGH
- Availability Impact
- HIGH
- Base Score
- 8.8
- Base Severity
- HIGH
- Exploitability Score
- 2
- Impact Score
- 6
References
| Reference URL | Reference Tags |
|---|---|
| https://usn.ubuntu.com/usn/usn-4183-1 | Third Party Advisory |
| https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/eoan/commit/?id=3644b9d5688da86f18e017c9c580b75cf52927bb | Mailing List Patch Third Party Advisory |
| https://usn.ubuntu.com/usn/usn-4184-1 | Third Party Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2019-15793 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-15793 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 17:34:43 | Added to TrackCVE | |||
| 2022-12-04 15:36:21 | 2020-04-24T00:15Z | 2020-04-24T00:15:11 | CVE Published Date | updated |
| 2022-12-04 15:36:21 | 2020-05-01T14:48:27 | CVE Modified Date | updated | |
| 2022-12-04 15:36:21 | Analyzed | Vulnerability Status | updated |