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amazonAmazonALAS2-2019-1279
HistorySep 13, 2019 - 11:08 p.m.

Low: kernel

2019-09-1323:08:00
alas.aws.amazon.com
15

5.5 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

6.6 Medium

AI Score

Confidence

High

2.1 Low

CVSS2

Access Vector

LOCAL

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

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

0.001 Low

EPSS

Percentile

31.2%

JSON

Issue Overview:

An issue was discovered in the fd_locked_ioctl function in drivers/block/floppy.c in the Linux kernel. The floppy driver will copy a kernel pointer to user memory in response to the FDGETPRM ioctl. An attacker can send the FDGETPRM ioctl and use the obtained kernel pointer to discover the location of kernel code and data and bypass kernel security protections such as KASLR. (CVE-2018-7755)

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 to update your system.

New Packages:

aarch64:  
    kernel-4.14.77-80.57.amzn2.aarch64  
    kernel-headers-4.14.77-80.57.amzn2.aarch64  
    kernel-debuginfo-common-aarch64-4.14.77-80.57.amzn2.aarch64  
    perf-4.14.77-80.57.amzn2.aarch64  
    perf-debuginfo-4.14.77-80.57.amzn2.aarch64  
    python-perf-4.14.77-80.57.amzn2.aarch64  
    python-perf-debuginfo-4.14.77-80.57.amzn2.aarch64  
    kernel-tools-4.14.77-80.57.amzn2.aarch64  
    kernel-tools-devel-4.14.77-80.57.amzn2.aarch64  
    kernel-tools-debuginfo-4.14.77-80.57.amzn2.aarch64  
    kernel-devel-4.14.77-80.57.amzn2.aarch64  
    kernel-debuginfo-4.14.77-80.57.amzn2.aarch64  
  
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

Additional References

Red Hat: CVE-2018-7755

Mitre: CVE-2018-7755

OSVersionArchitecturePackageVersionFilename
Amazon Linux2aarch64kernel< 4.14.77-80.57.amzn2kernel-4.14.77-80.57.amzn2.aarch64.rpm
Amazon Linux2aarch64kernel-headers< 4.14.77-80.57.amzn2kernel-headers-4.14.77-80.57.amzn2.aarch64.rpm
Amazon Linux2aarch64kernel-debuginfo-common-aarch64< 4.14.77-80.57.amzn2kernel-debuginfo-common-aarch64-4.14.77-80.57.amzn2.aarch64.rpm
Amazon Linux2aarch64perf< 4.14.77-80.57.amzn2perf-4.14.77-80.57.amzn2.aarch64.rpm
Amazon Linux2aarch64perf-debuginfo< 4.14.77-80.57.amzn2perf-debuginfo-4.14.77-80.57.amzn2.aarch64.rpm
Amazon Linux2aarch64python-perf< 4.14.77-80.57.amzn2python-perf-4.14.77-80.57.amzn2.aarch64.rpm
Amazon Linux2aarch64python-perf-debuginfo< 4.14.77-80.57.amzn2python-perf-debuginfo-4.14.77-80.57.amzn2.aarch64.rpm
Amazon Linux2aarch64kernel-tools< 4.14.77-80.57.amzn2kernel-tools-4.14.77-80.57.amzn2.aarch64.rpm
Amazon Linux2aarch64kernel-tools-devel< 4.14.77-80.57.amzn2kernel-tools-devel-4.14.77-80.57.amzn2.aarch64.rpm
Amazon Linux2aarch64kernel-tools-debuginfo< 4.14.77-80.57.amzn2kernel-tools-debuginfo-4.14.77-80.57.amzn2.aarch64.rpm
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5.5 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

6.6 Medium

AI Score

Confidence

High

2.1 Low

CVSS2

Access Vector

LOCAL

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

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

0.001 Low

EPSS

Percentile

31.2%

JSON
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