Integer overflow in Linux kernel - CVE-2019-11477

Vulnerability identifier: #VU18813

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-2019-11477

CWE-ID: CWE-190

Exploitation vector: Remote access

Exploit availability: No public exploit available

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

The vulnerability exists due to integer overflow when handling TCP Selective Acknowledgments (SACKs) due to incorrect processing of TCP_SKB_CB(skb)->tcp_gso_segs value in Linux kernel. A remote non-authenticated attacker can send specially crafted network traffic to the affected system, trigger integer overflow and render the system unavailable.

Successful exploitation of the vulnerability allows a remote attacker to perform denial of service (DoS) attack.

Linux kernel
Arch Linux
Amazon Linux AMI
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, big endian
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power 9
Red Hat Enterprise Linux for Real Time for NFV
Red Hat Enterprise Linux for Real Time
Red Hat Enterprise Linux for IBM System z (Structure A)
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux EUS Compute Node
Red Hat Enterprise Linux for Power, big endian - Extended Update Support
Red Hat Enterprise Linux Server - Extended Update Support
Red Hat Virtualization Host - Extended Update Support 4.2 for RHEL
Red Hat CodeReady Linux Builder for ARM 64
Red Hat Enterprise Linux for x86_64
Red Hat CodeReady Linux Builder for Power, little endian
Red Hat CodeReady Linux Builder for x86_64
Fedora
SIMATIC RF185C
SIMATIC RF186C
SIMATIC RF186CI
SIMATIC RF188C
RUGGEDCOM RM1224
SIMATIC RF188CI
SCALANCE WLC711
SCALANCE WLC712
SCALANCE W1700
SCALANCE SC-600
SCALANCE M875
MikroTik RouterOS
IBM Flex System EN2092 1Gb Ethernet Scalable Switch
SCALANCE M800
FlashSystem 900 9840-AE3 and 9843-AE3
FlashSystem 900 9840-AE2 and 9843-AE2
SCALANCE W-700 (IEEE 802.11n)
SCALANCE S615
TIM 1531 IRC
SINUMERIK 808D
Fujitsu M12-1
Fujitsu M12-2
Fujitsu M12-2S
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
SIMATIC RF166C
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
SIMATIC RF600R
SINUMERIK 840D sl
SINUMERIK 828D
SINEMA Remote Connect Server
FlashSystem 840 9840-AE1 & 9843-AE1
FlashSystem 900 9843-UF3
Fujitsu M10-4S
Fujitsu M10-4
Fujitsu M10-1
Oracle Enterprise Communications Broker
Oracle Enterprise Session Border Controller
Disk Library for mainframe (DLm)
Dell EMC Networking OS6
Flex System Fabric EN4093/EN4093R 10Gb Scalable Switch
SmartFabric OS10
SIMATIC MV500
SIMATIC ITC2200 PRO
SIMATIC ITC2200
SIMATIC ITC1900 PRO
SIMATIC ITC1900
SIMATIC ITC1500
SIMATIC ITC1500 PRO
MRG Realtime
Red Hat Virtualization Host
Oracle Communications Subscriber-Aware Load Balancer
Oracle Communications Session Router
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)

Update your kernel to the latest version.

Linux kernel - addressed in versions 4.4.182, 4.9.182, 4.14.127, 4.19.52, 5.2
CloudConnect 712 - update to 1.1.5
SCALANCE SC-600 - update to 2.0.1
SINEMA Remote Connect Server - update to 2.0 SP1
Fujitsu M10-4S - update to XCP2362
Fujitsu M10-4 - update to XCP2362
Fujitsu M10-1 - update to XCP2362
Fujitsu M12-1 - update to XCP3090
Fujitsu M12-2 - update to XCP3090
Fujitsu M12-2S - update to XCP3090
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
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

• https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.182
• https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.182
• https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.127
• https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.52
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.1.11
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.2

• Remote DoS in TCP/IP implementation in Linux kernel
• Multiple vulnerabilities in Mikrotik RouterOS
• Arch Linux update for linux-zen
• Arch Linux update for linux-lts
• Arch Linux update for Linux
• Arch Linux update for linux-hardened
• Amazon Linux AMI update for kernel
• Multiple vulnerabilities in Siemens CP 15XX and CP 12XX
• Multiple vulnerabilities in Siemens CM 1542-1
• Multiple vulnerabilities in Siemens CloudConnect 712
• Multiple vulnerabilities in Siemens RUGGEDCOM RM1224
• Multiple vulnerabilities in Siemens S7-1500 CPU 1518(F)-4 PN/DP MFP
• Multiple vulnerabilities in Siemens SCALANCE M800 and SCALANCE M875
• Multiple vulnerabilities in Siemens SCALANCE S615
• Multiple vulnerabilities in Siemens SCALANCE SC-600
• Multiple vulnerabilities in Siemens SCALANCE W-700 (IEEE 802.11n)
• Multiple vulnerabilities in Siemens SCALANCE W1700
• Multiple vulnerabilities in Siemens SCALANCE WLC711 and WLC712
• Multiple vulnerabilities in Siemens SIMATIC ITC1500 and SIMATIC ITC1500 PRO
• Multiple vulnerabilities in Siemens SIMATIC ITC1900 and ITC1900 PRO
• Multiple vulnerabilities in Siemens SIMATIC ITC2200 and ITC2200 PRO
• Multiple vulnerabilities in Siemens SIMATIC MV500
• Multiple vulnerabilities in Siemens SIMATIC RF16XX, RF18XX and RF600R
• Multiple vulnerabilities in Siemens SIMATIC SINEMA Remote Connect Server
• Multiple vulnerabilities in Siemens SINUMERIK 8XX
• Multiple vulnerabilities in Siemens TIM 1531 IRC
• Multiple vulnerabilities in Oracle Enterprise Session Border Controller
• Multiple vulnerabilities in Oracle Communications Session Router
• Integer overflow in Oracle Communications Subscriber-Aware Load Balancer
• Multiple vulnerabilities in Oracle Enterprise Communications Broker
• Remote DoS in TCP/IP implementation in Fujitsu M10 servers
• Multiple vulnerabilities in Fujitsu M12 servers
• Multiple vulnerabilities in Dell EMC Networking OS6
• Multiple vulnerabilities in Dell EMC Networking OS10
• Multiple vulnerabilities in Dell EMC Disk Library for mainframe
• Red Hat Enterprise Linux 8 update for kernel
• Red Hat Enterprise Linux 7 update for kernel
• Red Hat Enterprise Linux 7.5 Extended Update Support update for kernel
• Red Hat Enterprise Linux 7.4 Extended Update Support update for kernel
• Red Hat Enterprise Linux 7 update for kernel
• Red Hat Enterprise Linux 7 update for kernel
• Red Hat Enterprise Linux 8 update for kernel-rt
• Red Hat Enterprise Linux 7 update for kernel-rt
• Red Hat Enterprise MRG 2 update for kernel-rt
• Red Hat Virtualization 4 for Red Hat Enterprise Linux 7 update for redhat-virtualization-host
• Red Hat Enterprise Linux 7 update for kernel-alt
• Red Hat Virtualization 4 for Red Hat Enterprise Linux 7 update for redhat-virtualization-host
• Multiple vulnerabilities in IBM FlashSystem models 840 and 900
• Multiple vulnerabilities in IBM SAN Volume Controller, IBM Storwize, IBM Spectrum Virtualize and IBM FlashSystem products
• Multiple vulnerabilities in IBM Flex System switch firmware
• Red Hat Enterprise Linux 6 update for kernel
• Red Hat Enterprise Linux 6 update for kernel
• Red Hat Enterprise Linux 6 update for kernel
• Fedora 30 update for kernel, kernel-headers
• Fedora 29 update for kernel, kernel-headers
• Dell EMC Unity update for third-party components