Lucene search

K
amazonAmazonALAS-2018-1048
HistoryAug 04, 2018 - 11:47 p.m.

Low: kernel

2018-08-0423:47:00
alas.aws.amazon.com
531

CVSS2

4.3

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

5.5

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

EPSS

0.003

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

Issue Correction:
Run yum update kernel and reboot your instance to update your system.

New Packages:

i686:  
    kernel-headers-4.14.59-64.43.amzn1.i686  
    kernel-tools-4.14.59-64.43.amzn1.i686  
    kernel-debuginfo-common-i686-4.14.59-64.43.amzn1.i686  
    kernel-debuginfo-4.14.59-64.43.amzn1.i686  
    perf-4.14.59-64.43.amzn1.i686  
    kernel-tools-debuginfo-4.14.59-64.43.amzn1.i686  
    kernel-4.14.59-64.43.amzn1.i686  
    kernel-devel-4.14.59-64.43.amzn1.i686  
    perf-debuginfo-4.14.59-64.43.amzn1.i686  
    kernel-tools-devel-4.14.59-64.43.amzn1.i686  
  
src:  
    kernel-4.14.59-64.43.amzn1.src  
  
x86_64:  
    perf-debuginfo-4.14.59-64.43.amzn1.x86_64  
    kernel-tools-4.14.59-64.43.amzn1.x86_64  
    kernel-debuginfo-common-x86_64-4.14.59-64.43.amzn1.x86_64  
    perf-4.14.59-64.43.amzn1.x86_64  
    kernel-headers-4.14.59-64.43.amzn1.x86_64  
    kernel-4.14.59-64.43.amzn1.x86_64  
    kernel-tools-debuginfo-4.14.59-64.43.amzn1.x86_64  
    kernel-tools-devel-4.14.59-64.43.amzn1.x86_64  
    kernel-devel-4.14.59-64.43.amzn1.x86_64  
    kernel-debuginfo-4.14.59-64.43.amzn1.x86_64  

Additional References

Red Hat: CVE-2018-13093, CVE-2018-13094

Mitre: CVE-2018-13093, CVE-2018-13094

CVSS2

4.3

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

5.5

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

EPSS

0.003

Percentile

69.8%