SB2018110618 - Red Hat update for kernel

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Main Vulnerability Database SB2018110618

SB2018110618 - Red Hat update for kernel

Published: November 6, 2018

Security Bulletin ID SB2018110618
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 50% Low 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 vulnerabilities.


1) Out-of-bounds read (CVE-ID: CVE-2017-18344)

CWE-ID: CWE-125 - Out-of-bounds read

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


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

The vulnerability exists due to out-of-bounds memory read error in the 'sigevent->sigev_notify' field of show_timer() function in the timer subsystem. A local attacker can obtain potentially sensitive information from system memory.


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

CWE-ID: CWE-20 - Improper input validation

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


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