CVE-2016-7097
Public on 2016-10-16
Modified on 2017-06-07
Description
It was found that when file permissions were modified via chmod and the user modifying them was not in the owning group or capable of CAP_FSETID, the setgid bit would be cleared. Setting a POSIX ACL via setxattr sets the file permissions as well as the new ACL, but doesn't clear the setgid bit in a similar way. This could allow a local user to gain group privileges via certain setgid applications.
Severity
Medium
CVSS v3 Base Score
See breakdown
Affected Packages
| Platform | Package | Release Date | Advisory | Status |
|---|---|---|---|---|
| Amazon Linux 1 | kernel | 2017-03-06 | ALAS-2017-805 | Fixed |
CVSS Scores
| Score Type | Score | Vector | |
|---|---|---|---|
| Amazon Linux | CVSSv2 | 3.3 | AV:L/AC:M/Au:N/C:P/I:P/A:N |
| Amazon Linux | CVSSv3 | 4.4 | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N |
| NVD | CVSSv2 | 3.6 | AV:L/AC:L/Au:N/C:P/I:P/A:N |
| NVD | CVSSv3 | 4.4 | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N |