SB2018081712 - openSUSE update for ucode-intel

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Main Vulnerability Database SB2018081712

SB2018081712 - openSUSE update for ucode-intel

Published: August 17, 2018

Security Bulletin ID SB2018081712
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Adjecent network
Highest impact Information disclosure

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 vulnerabilities.


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

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear


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".

2) Rogue System Register Read (CVE-ID: CVE-2018-3640)

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear


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 loading of system registers to read privileged system registers

Note: the vulnerability is referred to as "Spectre variant 3A".

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

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear


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