Lucene search

K
amazonAmazonALAS-2023-1783
HistoryJul 13, 2023 - 11:57 p.m.

Important: kernel

2023-07-1323:57:00
alas.aws.amazon.com
15
linux kernel
netfilter subsystem
use-after-free
cap_net_admin
privilege escalation
cve-2023-3117
cve-2023-35001

CVSS3

7.8

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

EPSS

0.001

Percentile

25.6%

Issue Overview:

A use-after-free flaw was found in the Netfilter subsystem of the Linux kernel when processing named and anonymous sets in batch requests, which can lead to performing arbitrary reads and writes in kernel memory. This flaw allows a local user with CAP_NET_ADMIN capability to crash or potentially escalate their privileges on the system. (CVE-2023-3117)

Linux Kernel nftables Out-Of-Bounds Read/Write Vulnerability; nft_byteorder poorly handled vm register contents when CAP_NET_ADMIN is in any user or network namespace (CVE-2023-35001)

Affected Packages:

kernel

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

New Packages:

i686:  
    kernel-devel-4.14.320-168.534.amzn1.i686  
    kernel-headers-4.14.320-168.534.amzn1.i686  
    perf-4.14.320-168.534.amzn1.i686  
    kernel-4.14.320-168.534.amzn1.i686  
    kernel-tools-devel-4.14.320-168.534.amzn1.i686  
    perf-debuginfo-4.14.320-168.534.amzn1.i686  
    kernel-debuginfo-4.14.320-168.534.amzn1.i686  
    kernel-debuginfo-common-i686-4.14.320-168.534.amzn1.i686  
    kernel-tools-4.14.320-168.534.amzn1.i686  
    kernel-tools-debuginfo-4.14.320-168.534.amzn1.i686  
  
src:  
    kernel-4.14.320-168.534.amzn1.src  
  
x86_64:  
    kernel-headers-4.14.320-168.534.amzn1.x86_64  
    kernel-tools-4.14.320-168.534.amzn1.x86_64  
    kernel-tools-devel-4.14.320-168.534.amzn1.x86_64  
    kernel-devel-4.14.320-168.534.amzn1.x86_64  
    kernel-4.14.320-168.534.amzn1.x86_64  
    kernel-tools-debuginfo-4.14.320-168.534.amzn1.x86_64  
    kernel-debuginfo-4.14.320-168.534.amzn1.x86_64  
    kernel-debuginfo-common-x86_64-4.14.320-168.534.amzn1.x86_64  
    perf-debuginfo-4.14.320-168.534.amzn1.x86_64  
    perf-4.14.320-168.534.amzn1.x86_64  

Additional References

Red Hat: CVE-2023-3117, CVE-2023-35001

Mitre: CVE-2023-3117, CVE-2023-35001

CVSS3

7.8

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

EPSS

0.001

Percentile

25.6%