CVE-2021-3178
Public on 2021-01-19
Modified on 2021-02-19
Description
A flaw leak of the file handle for parent directory in the Linux kernel's NFS3 functionality was found in the way user calls READDIRPLUS. A local user could use this flaw to traverse to other parts of the file-system than mounted sub-folder.
Severity
Medium
CVSS v3 Base Score
See breakdown
Affected Packages
| Platform | Package | Release Date | Advisory | Status |
|---|---|---|---|---|
| Amazon Linux 1 | kernel | 2021-02-16 | ALAS-2021-1480 | Fixed |
| Amazon Linux 2 - Core | kernel | 2021-02-17 | ALAS2-2021-1600 | Fixed |
| Amazon Linux 2 - Kernel-5.4 Extra | kernel | 2022-01-20 | ALAS2KERNEL-5.4-2022-020 | Fixed |
CVSS Scores
| Score Type | Score | Vector | |
|---|---|---|---|
| Amazon Linux | CVSSv3 | 5.7 | CVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N |
| NVD | CVSSv2 | 5.5 | AV:N/AC:L/Au:S/C:P/I:P/A:N |
| NVD | CVSSv3 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N |