SB2018092514 - Red Hat update for kernel 

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Main Vulnerability Database SB2018092514

SB2018092514 - Red Hat update for kernel

Published: September 25, 2018

Security Bulletin ID SB2018092514
Severity
Medium
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 67% Low 33%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 secuirty vulnerabilities.


1) Resource exhaustion (CVE-ID: CVE-2018-5390)

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

The vulnerability exists due to the system uses an inefficient TCP reassembly algorithm. A remote attacker can send specially crafted packets within ongoing TCP sessions to consume excessive CPU resources and cause the service to crash.

Note: The issue has been called "SegmentSmack".


2) 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.


3) Use-after-free error (CVE-ID: CVE-2018-10675)

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

The weakness exists in the do_get_mempolicy function in mm/mempolicy.c due to use-after-free error. A local attacker can use specially crafted system calls, trigger memory corruption and cause the service to crash.


Remediation

Install update from vendor's website.

References