Resource exhaustion in Linux kernel - CVE-2018-5390

CSH
CYBERSECURITY HELP
Sign In REGISTER
 
Main Vulnerability Database Vulnerabilities #VU14200

Resource exhaustion in Linux kernel - CVE-2018-5390

Published: August 7, 2018 / Updated: August 7, 2018


Vulnerability identifier: #VU14200
CSH Severity: Medium
CVSS v4: 8.7 [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]
CVE-ID: CVE-2018-5390
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

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".


Affected software

Linux kernel
Arch Linux
Amazon Linux AMI
Debian Linux
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux Server - Extended Update Support
Red Hat Enterprise Linux for Power, big endian - Extended Update Support
Red Hat Enterprise Linux EUS Compute Node
Red Hat Enterprise Linux for Real Time for NFV
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux for Power 9
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power, big endian
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux for Real Time
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for IBM System z (Structure A)
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Opensuse

MX80
vPTX
vQFX
vSRX
vMX
PTX10008​
QFX10008
QFX5200
NFX 150/250
QFX5100
MX480
Cisco TelePresence Video Communication Server
Oracle Communications Session Border Controller
Meeting Management
MRG Realtime
kernel (Red Hat package)
kernel-rt (Red Hat package)
redhat-release-virtualization-host (Red Hat package)
redhat-virtualization-host (Red Hat package)
Red Hat Enterprise Linux Server for x86_64 - Update Services for SAP Solutions
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
kernel-alt (Red Hat package)
Red Hat Virtualization Host
Red Hat Virtualization
Cisco Web Security Appliance

How to mitigate CVE-2018-5390

Install update from vendor's website.

kernel (Red Hat package) - addressed in versions 2.6.32-358.93.1.el6, 2.6.32-431.93.2.el6, 2.6.32-504.76.2.el6, 2.6.32-573.62.1.el6, 3.10.0-327.73.1.el7, 3.10.0-514.58.1.el7, 3.10.0-693.39.1.el7, 3.10.0-862.11.6.el7
kernel-rt (Red Hat package) - addressed in versions 3.10.0-693.39.1.rt56.629.el6rt, 3.10.0-862.11.6.rt56.819.el7
redhat-release-virtualization-host (Red Hat package) - update to 4.2-5.2.el7
redhat-virtualization-host (Red Hat package) - update to 4.2-20180813.0.el7_5
kernel-alt (Red Hat package) - update to 4.14.0-115.el7a

External References

Related Security Bulletins