UbuntuUSN-3836-1Linux kernel vulnerabilities
7 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
5.1 Medium
AI Score
Confidence
Low
4.4 Medium
CVSS2
Access Vector
LOCAL
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:M/Au:N/C:P/I:P/A:P
0.001 Low
EPSS
Percentile
43.4%
Releases
- Ubuntu 18.04 ESM
Packages
- linux - Linux kernel
- linux-gcp - Linux kernel for Google Cloud Platform (GCP) systems
- linux-kvm - Linux kernel for cloud environments
- linux-raspi2 - Linux kernel for Raspberry Pi 2
Details
Jann Horn discovered that the Linux kernel mishandles mapping UID or GID
ranges inside nested user namespaces in some situations. A local attacker
could use this to bypass access controls on resources outside the
namespace. (CVE-2018-18955)
Philipp Wendler discovered that the overlayfs implementation in the Linux
kernel did not properly verify the directory contents permissions from
within a unprivileged user namespace. A local attacker could use this to
expose sensitive information (protected file names). (CVE-2018-6559)
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| Ubuntu | 18.04 | noarch | linux-image-4.15.0-1027-kvm | < 4.15.0-1027.27 | UNKNOWN |
| Ubuntu | 18.04 | noarch | linux-headers-4.15.0-1027-kvm | < 4.15.0-1027.27 | UNKNOWN |
| Ubuntu | 18.04 | noarch | linux-image-4.15.0-1027-kvm-dbgsym | < 4.15.0-1027.27 | UNKNOWN |
| Ubuntu | 18.04 | noarch | linux-kvm-headers-4.15.0-1027 | < 4.15.0-1027.27 | UNKNOWN |
| Ubuntu | 18.04 | noarch | linux-kvm-tools-4.15.0-1027 | < 4.15.0-1027.27 | UNKNOWN |
| Ubuntu | 18.04 | noarch | linux-kvm-tools-4.15.0-1027-dbgsym | < 4.15.0-1027.27 | UNKNOWN |
| Ubuntu | 18.04 | noarch | linux-modules-4.15.0-1027-kvm | < 4.15.0-1027.27 | UNKNOWN |
| Ubuntu | 18.04 | noarch | linux-tools-4.15.0-1027-kvm | < 4.15.0-1027.27 | UNKNOWN |
| Ubuntu | 18.04 | noarch | linux-image-4.15.0-1029-raspi2 | < 4.15.0-1029.31 | UNKNOWN |
| Ubuntu | 18.04 | noarch | linux-headers-4.15.0-1029-raspi2 | < 4.15.0-1029.31 | UNKNOWN |
Related
7 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
5.1 Medium
AI Score
Confidence
Low
4.4 Medium
CVSS2
Access Vector
LOCAL
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:M/Au:N/C:P/I:P/A:P
0.001 Low
EPSS
Percentile
43.4%