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amazonAmazonALAS-2019-1201
HistoryMay 02, 2019 - 5:22 p.m.

Important: kernel

2019-05-0217:22:00
alas.aws.amazon.com
142

4.7 Medium

CVSS2

Attack Vector

LOCAL

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

NONE

Availability Impact

NONE

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

6.5 Medium

CVSS3

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

0.002 Low

EPSS

Percentile

59.5%

Issue Overview:

A flaw was found in the Linux kernel’s implementation of logical link control and adaptation protocol (L2CAP), part of the Bluetooth stack in the l2cap_parse_conf_rsp and l2cap_parse_conf_req functions. An attacker with physical access within the range of standard Bluetooth transmission can create a specially crafted packet. The response to this specially crafted packet can contain part of the kernel stack which can be used in a further attack. (CVE-2019-3460)

A bypass was found for the Spectre v1 hardening in the eBPF engine of the Linux kernel. The code in the kernel/bpf/verifier.c performs undesirable out-of-bounds speculation on pointer arithmetic in various cases, including cases of different branches with different state or limits to sanitize, leading to side-channel attacks. (CVE-2019-7308)

A flaw was found in the Linux kernels implementation of Logical link control and adaptation protocol (L2CAP), part of the Bluetooth stack. An attacker with physical access within the range of standard Bluetooth transmission can create a specially crafted packet. The response to this specially crafted packet can contain part of the kernel stack which can be used in a further attack. (CVE-2019-3459)

Affected Packages:

kernel

Issue Correction:
Run yum update kernel to update your system.

New Packages:

i686:  
    kernel-4.14.114-82.97.amzn1.i686  
    perf-debuginfo-4.14.114-82.97.amzn1.i686  
    kernel-debuginfo-common-i686-4.14.114-82.97.amzn1.i686  
    kernel-tools-devel-4.14.114-82.97.amzn1.i686  
    kernel-headers-4.14.114-82.97.amzn1.i686  
    kernel-devel-4.14.114-82.97.amzn1.i686  
    perf-4.14.114-82.97.amzn1.i686  
    kernel-tools-4.14.114-82.97.amzn1.i686  
    kernel-tools-debuginfo-4.14.114-82.97.amzn1.i686  
    kernel-debuginfo-4.14.114-82.97.amzn1.i686  
  
src:  
    kernel-4.14.114-82.97.amzn1.src  
  
x86_64:  
    kernel-4.14.114-82.97.amzn1.x86_64  
    kernel-debuginfo-common-x86_64-4.14.114-82.97.amzn1.x86_64  
    kernel-devel-4.14.114-82.97.amzn1.x86_64  
    kernel-tools-debuginfo-4.14.114-82.97.amzn1.x86_64  
    perf-debuginfo-4.14.114-82.97.amzn1.x86_64  
    kernel-debuginfo-4.14.114-82.97.amzn1.x86_64  
    kernel-tools-devel-4.14.114-82.97.amzn1.x86_64  
    kernel-headers-4.14.114-82.97.amzn1.x86_64  
    kernel-tools-4.14.114-82.97.amzn1.x86_64  
    perf-4.14.114-82.97.amzn1.x86_64  

Additional References

Red Hat: CVE-2019-3459, CVE-2019-3460, CVE-2019-7308

Mitre: CVE-2019-3459, CVE-2019-3460, CVE-2019-7308

4.7 Medium

CVSS2

Attack Vector

LOCAL

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

NONE

Availability Impact

NONE

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

6.5 Medium

CVSS3

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

0.002 Low

EPSS

Percentile

59.5%