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amazonAmazonALAS2-2018-1046
HistoryJul 23, 2018 - 11:01 p.m.

Medium: kernel

2018-07-2323:01:00
alas.aws.amazon.com
10

5.9 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

6.2 Medium

AI Score

Confidence

High

4.3 Medium

CVSS2

Access Vector

Access Complexity

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:N/I:N/A:P

0.031 Low

EPSS

Percentile

91.1%

Issue Overview:

The fs/ext4/inline.c:ext4_read_inline_data() function in the Linux kernel performs a memcpy with an untrusted length value in certain circumstances involving a crafted filesystem that stores the system.data extended attribute value in a dedicated inode. The unbound copy can cause memory corruption or possible privilege escalation.(CVE-2018-11412)

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 restart the instance to update your system.

New Packages:

i686:  
    kernel-headers-4.14.55-68.37.amzn2.i686  
  
src:  
    kernel-4.14.55-68.37.amzn2.src  
  
x86_64:  
    kernel-4.14.55-68.37.amzn2.x86_64  
    kernel-headers-4.14.55-68.37.amzn2.x86_64  
    kernel-debuginfo-common-x86_64-4.14.55-68.37.amzn2.x86_64  
    perf-4.14.55-68.37.amzn2.x86_64  
    perf-debuginfo-4.14.55-68.37.amzn2.x86_64  
    python-perf-4.14.55-68.37.amzn2.x86_64  
    python-perf-debuginfo-4.14.55-68.37.amzn2.x86_64  
    kernel-tools-4.14.55-68.37.amzn2.x86_64  
    kernel-tools-devel-4.14.55-68.37.amzn2.x86_64  
    kernel-tools-debuginfo-4.14.55-68.37.amzn2.x86_64  
    kernel-devel-4.14.55-68.37.amzn2.x86_64  
    kernel-debuginfo-4.14.55-68.37.amzn2.x86_64  

Additional References

Red Hat: CVE-2018-11412

Mitre: CVE-2018-11412

5.9 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

6.2 Medium

AI Score

Confidence

High

4.3 Medium

CVSS2

Access Vector

Access Complexity

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:N/I:N/A:P

0.031 Low

EPSS

Percentile

91.1%