SB2018062610 - Red Hat update for kernel-alt
Published: June 26, 2018
Security Bulletin ID
SB2018062610
Severity
Low
Patch available
YES
Number of vulnerabilities
2
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 secuirty vulnerabilities.
1) 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".
2) Information disclosure (CVE-ID: CVE-2017-5715)
The vulnerability allows a local attacker to obtain potentially sensitive information.
The vulnerability exists in Intel CPU hardware due to improper implementation of the speculative execution of instructions. A local attacker can utilize branch target injection, execute arbitrary code, perform a side-channel attack and read sensitive memory information.
Remediation
Install update from vendor's website.