4.6 Medium
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:P/I:P/A:P
0.0004 Low
EPSS
Percentile
5.3%
The Linux kernel through 3.17.4 does not properly restrict dropping of supplemental group memberships in certain namespace scenarios, which allows local users to bypass intended file permissions by leveraging a POSIX ACL containing an entry for the group category that is more restrictive than the entry for the other category, aka a “negative groups” issue, related to kernel/groups.c, kernel/uid16.c, and kernel/user_namespace.c.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Debian | 12 | all | linux | < 3.16.7-ckt4-1 | linux_3.16.7-ckt4-1_all.deb |
Debian | 11 | all | linux | < 3.16.7-ckt4-1 | linux_3.16.7-ckt4-1_all.deb |
Debian | 10 | all | linux | < 3.16.7-ckt4-1 | linux_3.16.7-ckt4-1_all.deb |
Debian | 999 | all | linux | < 3.16.7-ckt4-1 | linux_3.16.7-ckt4-1_all.deb |
Debian | 13 | all | linux | < 3.16.7-ckt4-1 | linux_3.16.7-ckt4-1_all.deb |