Resource exhaustion in Linux kernel - CVE-2019-11478

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Main Vulnerability Database Vulnerabilities #VU18946

Resource exhaustion in Linux kernel - CVE-2019-11478

Published: July 1, 2019 / Updated: May 30, 2020


Vulnerability identifier: #VU18946
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-2019-11478
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform denial of service (DoS) attack.

The vulnerability exists due to an error when processing TCP Selective Acknowledgment (SACK) sequences within the Linux kernel TCP retransmission queue implementation in tcp_fragment. A remote non-authenticated attacker can send specially crafted network traffic to the affected system and perform a denial of service (DoS) attack.



Affected software

Linux kernel
Arch Linux
Amazon Linux AMI
Red Hat Enterprise Linux for Power, big endian
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 Scientific Computing
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux for Power 9
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for IBM System z (Structure A)
Red Hat Enterprise Linux for Real Time for NFV
Red Hat Enterprise Linux for Real Time
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux Server - TUS
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 IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Virtualization Host - Extended Update Support 4.2 for RHEL
Red Hat Enterprise Linux for x86_64
Red Hat CodeReady Linux Builder for x86_64
Red Hat CodeReady Linux Builder for Power, little endian
Red Hat CodeReady Linux Builder for ARM 64
Fedora
SCALANCE WLC712
SCALANCE W1700
SCALANCE SC-600
SCALANCE M875
RUGGEDCOM RM1224
SCALANCE WLC711
SIMATIC RF185C
SIMATIC RF186C
SIMATIC RF186CI
SIMATIC RF188C
SIMATIC RF188CI
MikroTik RouterOS
IBM Flex System EN2092 1Gb Ethernet Scalable Switch
SCALANCE W-700 (IEEE 802.11n)
SCALANCE S615
SCALANCE M800
FlashSystem 900 9840-AE3 and 9843-AE3
FlashSystem 900 9840-AE2 and 9843-AE2
TIM 1531 IRC
SINUMERIK 808D
SAN Volume Controller and Storwize Family
Flex System Fabric SI4093 System Interconnect Module firmware
Flex System Fabric CN4093 10Gb ScSE firmware
S7-1500 CPU 1518(F)-4 PN/DP MFP
ROX II
CloudConnect 712
CM 1542-1
CP 1242-7
CP 1543SP-1
CP 1543-1
CP 1542SP-1 IRC
CP 1542SP-1
CP 1243-8 IRC
CP 1243-7 LTE US
CP 1243-7 LTE EU
CP 1243-1
SINUMERIK 840D sl
SINUMERIK 828D
SINEMA Remote Connect Server
SIMATIC RF166C
SIMATIC RF600R
SIMATIC ITC1500 PRO
SIMATIC ITC2200 PRO
SIMATIC ITC2200
SIMATIC ITC1900 PRO
SIMATIC ITC1900
SIMATIC ITC1500
FlashSystem 900 9843-UF3
FlashSystem 840 9840-AE1 & 9843-AE1
Disk Library for mainframe (DLm)
Dell EMC Networking OS6
Flex System Fabric EN4093/EN4093R 10Gb Scalable Switch
SmartFabric OS10
SIMATIC MV500
MRG Realtime
Red Hat Virtualization Host
linux (Debian package)
kernel (Red Hat package)
kernel-rt (Red Hat package)
redhat-release-virtualization-host (Red Hat package)
redhat-virtualization-host (Red Hat package)
kernel-alt (Red Hat package)
kernel
kernel-headers
Dell EMC Unity VSA Operating Environment (OE)
Dell EMC Unity Operating Environment (OE)

How to mitigate CVE-2019-11478

Update your kernel to the latest version.


Linux kernel - addressed in versions 4.4.189, 4.9.189, 4.14.138, 4.19.62, 5.3
SCALANCE SC-600 - update to 2.0.1
CloudConnect 712 - update to 1.1.5
SINEMA Remote Connect Server - update to 2.0 SP1
linux (Debian package) - update to 4.9.168-1+deb9u4
MikroTik RouterOS - addressed in versions 6.44.4, 6.45.1
kernel (Red Hat package) - addressed in versions 2.6.32-431.95.3.el6, 2.6.32-504.79.3.el6, 2.6.32-754.15.3.el6, 3.10.0-327.79.2.el7, 3.10.0-514.66.2.el7, 3.10.0-693.50.3.el7, 3.10.0-862.34.2.el7, 3.10.0-957.21.3.el7, 4.18.0-80.4.2.el8_0, 4.18.0-80.15.1.el8_0
kernel-rt (Red Hat package) - addressed in versions 3.10.0-693.50.3.rt56.644.el6rt, 3.10.0-957.21.3.rt56.935.el7, 4.18.0-80.4.2.rt9.152.el8_0
redhat-release-virtualization-host (Red Hat package) - addressed in versions 4.2-11.1.el7, 4.3.4-1.el7ev
redhat-virtualization-host (Red Hat package) - addressed in versions 4.2-20190618.0.el7_6, 4.3.4-20190620.3.el7_6
Disk Library for mainframe (DLm) - update to 4.5-4.4
kernel-alt (Red Hat package) - update to 4.14.0-115.8.2.el7a
Dell EMC Unity VSA Operating Environment (OE) - update to 5.0.3.0.5.014
Dell EMC Unity Operating Environment (OE) - update to 5.0.3.0.5.014
kernel - addressed in versions 5.1.11-200.fc29, 5.1.11-300.fc30
kernel-headers - addressed in versions 5.1.11-200.fc29, 5.1.11-300.fc30
Dell EMC Networking OS6 - update to 6.6.0.7
SAN Volume Controller and Storwize Family - addressed in versions 7.8.1.11, 8.2.1.6, 8.3.0.0
Flex System Fabric EN4093/EN4093R 10Gb Scalable Switch - update to 7.8.24.0
IBM Flex System EN2092 1Gb Ethernet Scalable Switch - update to 7.8.24.0
Flex System Fabric SI4093 System Interconnect Module firmware - update to 7.8.24.0
Flex System Fabric CN4093 10Gb ScSE firmware - update to 7.8.24.0
SmartFabric OS10 - update to 10.5.0.0

External References

Related Security Bulletins