CVSS2
Attack Vector
LOCAL
Attack 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
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
EPSS
Percentile
5.1%
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.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ubuntu | 19.10 | noarch | linux | < 5.3.0-22.24 | UNKNOWN |
ubuntu | 19.10 | noarch | linux-aws | < 5.3.0-1007.8 | UNKNOWN |
ubuntu | 19.10 | noarch | linux-azure | < 5.3.0-1007.8 | UNKNOWN |
ubuntu | 19.10 | noarch | linux-gcp | < 5.3.0-1008.9 | UNKNOWN |
ubuntu | 19.10 | noarch | linux-kvm | < 5.3.0-1007.8 | UNKNOWN |
ubuntu | 19.10 | noarch | linux-oracle | < 5.3.0-1006.7 | UNKNOWN |
ubuntu | 19.10 | noarch | linux-raspi2 | < 5.3.0-1012.14 | UNKNOWN |
CVSS2
Attack Vector
LOCAL
Attack 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
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
EPSS
Percentile
5.1%