CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:N/I:N/A:P
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
AI Score
Confidence
Low
EPSS
Percentile
69.8%
Issue Overview:
An issue was discovered in the XFS filesystem in fs/xfs/libxfs/xfs_attr_leaf.c in the Linux kernel. A NULL pointer dereference may occur for a corrupted xfs image after xfs_da_shrink_inode() is called with a NULL bp. This can lead to a system crash and a denial of service.(CVE-2018-13094)
An issue was discovered in the XFS filesystem in fs/xfs/xfs_icache.c in the Linux kernel. There is a NULL pointer dereference leading to a system panic in lookup_slow() on a NULL inode->i_ops pointer when doing pathwalks on a corrupted xfs image. This occurs because of a lack of proper validation that cached inodes are free during an allocation.(CVE-2018-13093)
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:
src:
kernel-4.14.59-68.43.amzn2.src
x86_64:
kernel-4.14.59-68.43.amzn2.x86_64
kernel-headers-4.14.59-68.43.amzn2.x86_64
kernel-debuginfo-common-x86_64-4.14.59-68.43.amzn2.x86_64
perf-4.14.59-68.43.amzn2.x86_64
perf-debuginfo-4.14.59-68.43.amzn2.x86_64
python-perf-4.14.59-68.43.amzn2.x86_64
python-perf-debuginfo-4.14.59-68.43.amzn2.x86_64
kernel-tools-4.14.59-68.43.amzn2.x86_64
kernel-tools-devel-4.14.59-68.43.amzn2.x86_64
kernel-tools-debuginfo-4.14.59-68.43.amzn2.x86_64
kernel-devel-4.14.59-68.43.amzn2.x86_64
kernel-debuginfo-4.14.59-68.43.amzn2.x86_64
Red Hat: CVE-2018-13093, CVE-2018-13094
Mitre: CVE-2018-13093, CVE-2018-13094
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:N/I:N/A:P
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
AI Score
Confidence
Low
EPSS
Percentile
69.8%