SB2021071392 - Amazon Linux AMI update for kernel

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Main Vulnerability Database SB2021071392

SB2021071392 - Amazon Linux AMI update for kernel

Published: July 13, 2021

Security Bulletin ID SB2021071392
Severity
Low
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Buffer overflow (CVE-ID: CVE-2021-29650)

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error within the netfilter subsystem in net/netfilter/x_tables.c and include/linux/netfilter/x_tables.h. A local user can trigger memory corruption upon the assignment of a new table value and cause denial of service.


2) Out-of-bounds write (CVE-ID: CVE-2021-33200)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error in kernel/bpf/verifier.c. A local user can trigger an out-of-bounds write and escalate privileges on the system.


Remediation

Install update from vendor's website.

References