SB2018082812 - Denial of service in Cisco products 

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Main Vulnerability Database SB2018082812

SB2018082812 - Denial of service in Cisco products

Published: August 28, 2018

Security Bulletin ID SB2018082812
Severity
Medium
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 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) Resource exhaustion (CVE-ID: CVE-2018-6922)

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.


Remediation

Install update from vendor's website.

References