7.1 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
7 High
AI Score
Confidence
High
4.9 Medium
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:L/Au:N/C:C/I:N/A:N
0.001 Low
EPSS
Percentile
27.1%
Issue Overview:
An issue was discovered in the proc_pid_stack function in fs/proc/base.c in the Linux kernel. An attacker with a local account can trick the stack unwinder code to leak stack contents to userspace. The fix allows only root to inspect the kernel stack of an arbitrary task.(CVE-2018-17972)
A vulnerability was discovered in the Linux kernel that allows an attacker to escalate privileges with using a 64-bit ARM architecture. A local attacker with permission to create KVM-based virtual machines can both panic the hypervisor by triggering an illegal exception return (resulting in a DoS) and to redirect execution elsewhere within the hypervisor with full register control, instead of causing a return to the guest.(CVE-2018-18021)
Affected Packages:
kernel
Note:
This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.
Issue Correction:
Run yum update kernel and reboot your instance to update your system.
New Packages:
i686:
kernel-headers-4.14.77-80.57.amzn2.i686
src:
kernel-4.14.77-80.57.amzn2.src
x86_64:
kernel-4.14.77-80.57.amzn2.x86_64
kernel-headers-4.14.77-80.57.amzn2.x86_64
kernel-debuginfo-common-x86_64-4.14.77-80.57.amzn2.x86_64
perf-4.14.77-80.57.amzn2.x86_64
perf-debuginfo-4.14.77-80.57.amzn2.x86_64
python-perf-4.14.77-80.57.amzn2.x86_64
python-perf-debuginfo-4.14.77-80.57.amzn2.x86_64
kernel-tools-4.14.77-80.57.amzn2.x86_64
kernel-tools-devel-4.14.77-80.57.amzn2.x86_64
kernel-tools-debuginfo-4.14.77-80.57.amzn2.x86_64
kernel-devel-4.14.77-80.57.amzn2.x86_64
kernel-debuginfo-4.14.77-80.57.amzn2.x86_64
Red Hat: CVE-2018-17972, CVE-2018-18021
Mitre: CVE-2018-17972, CVE-2018-18021
7.1 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
7 High
AI Score
Confidence
High
4.9 Medium
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:L/Au:N/C:C/I:N/A:N
0.001 Low
EPSS
Percentile
27.1%