SB2018081024 - Amazon Linux AMI update for kernel

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Main Vulnerability Database SB2018081024

SB2018081024 - Amazon Linux AMI update for kernel

Published: August 10, 2018

Security Bulletin ID SB2018081024
Severity
Medium
Patch available
YES
Number of vulnerabilities 5
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 20% Low 80%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 5 secuirty vulnerabilities.


1) Side-channel attack (CVE-ID: CVE-2018-3615)

The vulnerability allows a local attacker to obtain potentially sensitive information.

The vulnerability exists due to an error in systems with microprocessors utilizing speculative execution and Intel® software guard extensions (Intel® SGX). A local attacker can conduct side-channel attack and gain access to potentially sensitive information residing in the L1 data cache from an enclave.


2) Side-channel attack (CVE-ID: CVE-2018-3620)

The vulnerability allows a local attacker to obtain potentially sensitive information.

The vulnerability exists due to an error in systems with microprocessors utilizing speculative execution and address translations . A local attacker can trigger terminal page fault, conduct side-channel attack and gain access to potentially sensitive information residing in the L1 data cache.


3) Information disclosure (CVE-ID: CVE-2018-3646)

The vulnerability allows an adjacent attacker to obtain potentially sensitive information on the target system.

The weakness exists on the systems with microprocessors utilizing speculative execution and address translations due to an error in Hypervisor. An adjacent attacker can access information residing in the L1 data cache via a terminal page fault and a side-channel analysis.


4) Side-channel attack (CVE-ID: CVE-2018-3646)

The vulnerability allows an adjacent attacker to obtain potentially sensitive information.

The vulnerability exists due to an error in systems with microprocessors utilizing speculative execution and address translations. An adjacent attacker with guest OS privilege can trigger terminal page fault, conduct side-channel attack and gain access to potentially sensitive information residing in the L1 data cache.


5) Improper input validation (CVE-ID: CVE-2018-5391)

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The vulnerability exists due to an error when handling reassembly of fragmented IPv4 and IPv6 packets. A remote attacker can send specially crafted packets, trigger time and calculation expensive fragment reassembly algorithms and cause the service to crash.


Remediation

Install update from vendor's website.

References