SB2018081521 - Red Hat Enterprise MRG 2 update for kernel-rt

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Main Vulnerability Database SB2018081521

SB2018081521 - Red Hat Enterprise MRG 2 update for kernel-rt

Published: August 15, 2018

Security Bulletin ID SB2018081521
Severity
Low
Patch available
YES
Number of vulnerabilities 4
Exploitation vector Adjecent network
Highest impact Information disclosure

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 4 secuirty vulnerabilities.


1) 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.


2) Speculative Store Bypass (CVE-ID: CVE-2018-3639)

The vulnerability allows a local attacker to obtain potentially sensitive information on the target system.

The weakness exists due to race conditions in CPU cache processing. A local attacker can conduct a side-channel attack to exploit a flaw in the speculative execution of Load and Store instructions to read privileged memory.

Note: the vulnerability is referred to as "Spectre variant 4".

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.


Remediation

Install update from vendor's website.

References