Security restrictions bypass in Linux kernel - CVE-2018-7755

Vulnerability identifier: #VU10918

CSH Severity: Low

CVSS v4: 5.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2018-7755

CWE-ID: CWE-264

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local unauthenticated attacker to bypass security restrictions on the target system.

The weakness exists in the drivers/block/floppy.c source code in the fd_locked_ioctl function due to insufficient security restrictions. A local attacker can bypass security restrictions through the system floppy drive and obtain kernel code and data from the system.

Linux kernel
Amazon Linux AMI
SUSE CaaS Platform
SUSE Manager Server
SUSE Manager Retail Branch Server
SUSE Manager Proxy
SUSE Enterprise Storage
Red Hat Enterprise Linux for Real Time
Red Hat Enterprise Linux for Real Time for NFV
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, big endian
Red Hat Enterprise Linux for Scientific Computing
HPE Helion Openstack
SUSE OpenStack Cloud
SUSE OpenStack Cloud Crowbar
SUSE Linux Enterprise Server
SUSE Linux Enterprise High Availability
SUSE Linux Enterprise High Performance Computing
SUSE Linux Enterprise Server for SAP
SUSE Linux Enterprise Workstation Extension
SUSE Linux Enterprise Software Development Kit
SUSE Linux Enterprise Server for SAP Applications
SUSE Linux Enterprise Live Patching
SUSE Linux Enterprise Desktop
SUSE Linux Enterprise Real Time Extension
SUSE Linux Enterprise Module for Live Patching
openSUSE Leap

kernel (Red Hat package)
kernel-rt (Red Hat package)
kgraft-patch-4_4_180-94_164-default
kgraft-patch-4_4_180-94_164-default-debuginfo
kgraft-patch-4_12_14-122_121-default
kernel-livepatch-4_12_14-150100_197_114-default
kernel-ec2-devel
kernel-default
kernel-default-base
kernel-default-devel
kernel-ec2
kernel-ec2-base
kernel-source
kernel-syms
kernel-trace
kernel-trace-base
kernel-trace-devel
kernel-xen
kernel-xen-base
kernel-xen-devel
kernel-macros
kernel-devel
kernel-default-debugsource
kernel-default-debuginfo
kernel-default-base-debuginfo
kernel-default-kgraft
kernel-default-man
cluster-md-kmp-default
cluster-md-kmp-default-debuginfo
dlm-kmp-default
dlm-kmp-default-debuginfo
gfs2-kmp-default
gfs2-kmp-default-debuginfo
ocfs2-kmp-default
ocfs2-kmp-default-debuginfo
kernel-rt-debuginfo
gfs2-kmp-rt-debuginfo
kernel-devel-rt
kernel-source-rt
cluster-md-kmp-rt
cluster-md-kmp-rt-debuginfo
dlm-kmp-rt
dlm-kmp-rt-debuginfo
gfs2-kmp-rt
kernel-rt
kernel-rt-base
kernel-rt-base-debuginfo
ocfs2-kmp-rt-debuginfo
kernel-rt-debugsource
kernel-rt-devel
kernel-rt-devel-debuginfo
kernel-rt_debug
kernel-rt_debug-debuginfo
kernel-rt_debug-debugsource
kernel-rt_debug-devel
kernel-rt_debug-devel-debuginfo
kernel-syms-rt
ocfs2-kmp-rt
kernel-syms-azure
kernel-azure-devel
kernel-azure-debugsource
kernel-devel-azure
kernel-source-azure
kernel-azure
kernel-azure-base
kernel-azure-base-debuginfo
kernel-azure-debuginfo
kernel-obs-build
kernel-obs-build-debugsource
kernel-default-kgraft-devel
kernel-default-extra
kernel-default-extra-debuginfo
kernel-docs
kernel-default-devel-debuginfo
kernel-vanilla-debugsource
kernel-vanilla-devel
kernel-vanilla-devel-debuginfo
kernel-vanilla-livepatch-devel
kernel-debug-base
kernel-debug-base-debuginfo
kernel-kvmsmall-base
kernel-kvmsmall-base-debuginfo
kernel-zfcpdump-man
kernel-vanilla-debuginfo
kernel-vanilla
kernel-zfcpdump-debuginfo
kernel-vanilla-base
kernel-default-livepatch-devel
kernel-default-livepatch
kernel-vanilla-base-debuginfo
kernel-zfcpdump-debugsource
reiserfs-kmp-default-debuginfo
reiserfs-kmp-default
Red Hat Virtualization Host
Dell Secure Connect Gateway
Dell EMC Storage Monitoring and Reporting (SMR)

Install updates from vendor's website.

Linux kernel - addressed in versions 4.4.160, 4.9.131, 4.14.74, 4.18.12
kernel (Red Hat package) - update to 3.10.0-1062.el7
kernel-rt (Red Hat package) - update to 3.10.0-1062.rt56.1022.el7
Dell Secure Connect Gateway - update to 5.12.00.10
kgraft-patch-4_4_180-94_164-default - update to 1-4.3.2
kgraft-patch-4_4_180-94_164-default-debuginfo - update to 1-4.3.2
kgraft-patch-4_12_14-122_121-default - update to 1-8.5.2
kernel-livepatch-4_12_14-150100_197_114-default - update to 1-150100.3.3.2
kernel-ec2-devel - update to 3.0.101-108.138.1
kernel-default - addressed in versions 3.0.101-108.138.1, 4.4.121-92.175.2, 4.4.180-94.164.3, 4.12.14-122.121.2, 4.12.14-150100.197.114.2
kernel-default-base - addressed in versions 3.0.101-108.138.1, 4.4.121-92.175.2, 4.4.180-94.164.3, 4.12.14-122.121.2, 4.12.14-150100.197.114.2
kernel-default-devel - addressed in versions 3.0.101-108.138.1, 4.4.121-92.175.2, 4.4.180-94.164.3, 4.12.14-122.121.2, 4.12.14-150100.197.114.2
kernel-ec2 - update to 3.0.101-108.138.1
kernel-ec2-base - update to 3.0.101-108.138.1
kernel-source - addressed in versions 3.0.101-108.138.1, 4.4.121-92.175.2, 4.4.180-94.164.2, 4.12.14-122.121.2, 4.12.14-150100.197.114.2
kernel-syms - addressed in versions 3.0.101-108.138.1, 4.4.121-92.175.2, 4.4.180-94.164.2, 4.12.14-122.121.2, 4.12.14-150100.197.114.2
kernel-trace - update to 3.0.101-108.138.1
kernel-trace-base - update to 3.0.101-108.138.1
kernel-trace-devel - update to 3.0.101-108.138.1
kernel-xen - update to 3.0.101-108.138.1
kernel-xen-base - update to 3.0.101-108.138.1
kernel-xen-devel - update to 3.0.101-108.138.1
kernel-macros - addressed in versions 4.4.121-92.175.2, 4.4.180-94.164.2, 4.12.14-122.121.2, 4.12.14-150100.197.114.2
kernel-devel - addressed in versions 4.4.121-92.175.2, 4.4.180-94.164.2, 4.12.14-122.121.2, 4.12.14-150100.197.114.2
kernel-default-debugsource - addressed in versions 4.4.121-92.175.2, 4.4.180-94.164.3, 4.12.14-122.121.2, 4.12.14-150100.197.114.2
kernel-default-debuginfo - addressed in versions 4.4.121-92.175.2, 4.4.180-94.164.3, 4.12.14-122.121.2, 4.12.14-150100.197.114.2
kernel-default-base-debuginfo - addressed in versions 4.4.121-92.175.2, 4.4.180-94.164.3, 4.12.14-122.121.2, 4.12.14-150100.197.114.2
kernel-default-kgraft - addressed in versions 4.4.180-94.164.3, 4.12.14-122.121.2
kernel-default-man - addressed in versions 4.4.180-94.164.3, 4.12.14-122.121.2, 4.12.14-150100.197.114.2
cluster-md-kmp-default - addressed in versions 4.4.180-94.164.3, 4.12.14-122.121.2, 4.12.14-150100.197.114.2
cluster-md-kmp-default-debuginfo - addressed in versions 4.4.180-94.164.3, 4.12.14-122.121.2, 4.12.14-150100.197.114.2
dlm-kmp-default - addressed in versions 4.4.180-94.164.3, 4.12.14-122.121.2, 4.12.14-150100.197.114.2
dlm-kmp-default-debuginfo - addressed in versions 4.4.180-94.164.3, 4.12.14-122.121.2, 4.12.14-150100.197.114.2
gfs2-kmp-default - addressed in versions 4.4.180-94.164.3, 4.12.14-122.121.2, 4.12.14-150100.197.114.2
gfs2-kmp-default-debuginfo - addressed in versions 4.4.180-94.164.3, 4.12.14-122.121.2, 4.12.14-150100.197.114.2
ocfs2-kmp-default - addressed in versions 4.4.180-94.164.3, 4.12.14-122.121.2, 4.12.14-150100.197.114.2
ocfs2-kmp-default-debuginfo - addressed in versions 4.4.180-94.164.3, 4.12.14-122.121.2, 4.12.14-150100.197.114.2
Dell EMC Storage Monitoring and Reporting (SMR) - update to 4.8.0.0
kernel-rt-debuginfo - update to 4.12.14-10.89.1
gfs2-kmp-rt-debuginfo - update to 4.12.14-10.89.1
kernel-devel-rt - update to 4.12.14-10.89.1
kernel-source-rt - update to 4.12.14-10.89.1
cluster-md-kmp-rt - update to 4.12.14-10.89.1
cluster-md-kmp-rt-debuginfo - update to 4.12.14-10.89.1
dlm-kmp-rt - update to 4.12.14-10.89.1
dlm-kmp-rt-debuginfo - update to 4.12.14-10.89.1
gfs2-kmp-rt - update to 4.12.14-10.89.1
kernel-rt - update to 4.12.14-10.89.1
kernel-rt-base - update to 4.12.14-10.89.1
kernel-rt-base-debuginfo - update to 4.12.14-10.89.1
ocfs2-kmp-rt-debuginfo - update to 4.12.14-10.89.1
kernel-rt-debugsource - update to 4.12.14-10.89.1
kernel-rt-devel - update to 4.12.14-10.89.1
kernel-rt-devel-debuginfo - update to 4.12.14-10.89.1
kernel-rt_debug - update to 4.12.14-10.89.1
kernel-rt_debug-debuginfo - update to 4.12.14-10.89.1
kernel-rt_debug-debugsource - update to 4.12.14-10.89.1
kernel-rt_debug-devel - update to 4.12.14-10.89.1
kernel-rt_debug-devel-debuginfo - update to 4.12.14-10.89.1
kernel-syms-rt - update to 4.12.14-10.89.1
ocfs2-kmp-rt - update to 4.12.14-10.89.1
kernel-syms-azure - update to 4.12.14-16.97.1
kernel-azure-devel - update to 4.12.14-16.97.1
kernel-azure-debugsource - update to 4.12.14-16.97.1
kernel-devel-azure - update to 4.12.14-16.97.1
kernel-source-azure - update to 4.12.14-16.97.1
kernel-azure - update to 4.12.14-16.97.1
kernel-azure-base - update to 4.12.14-16.97.1
kernel-azure-base-debuginfo - update to 4.12.14-16.97.1
kernel-azure-debuginfo - update to 4.12.14-16.97.1
kernel-obs-build - addressed in versions 4.12.14-122.121.1, 4.12.14-150100.197.114.2
kernel-obs-build-debugsource - addressed in versions 4.12.14-122.121.1, 4.12.14-150100.197.114.2
kernel-default-kgraft-devel - update to 4.12.14-122.121.2
kernel-default-extra - update to 4.12.14-122.121.2
kernel-default-extra-debuginfo - update to 4.12.14-122.121.2
kernel-docs - addressed in versions 4.12.14-122.121.2, 4.12.14-150100.197.114.2
kernel-default-devel-debuginfo - addressed in versions 4.12.14-122.121.2, 4.12.14-150100.197.114.2
kernel-vanilla-debugsource - update to 4.12.14-150100.197.114.2
kernel-vanilla-devel - update to 4.12.14-150100.197.114.2
kernel-vanilla-devel-debuginfo - update to 4.12.14-150100.197.114.2
kernel-vanilla-livepatch-devel - update to 4.12.14-150100.197.114.2
kernel-debug-base - update to 4.12.14-150100.197.114.2
kernel-debug-base-debuginfo - update to 4.12.14-150100.197.114.2
kernel-kvmsmall-base - update to 4.12.14-150100.197.114.2
kernel-kvmsmall-base-debuginfo - update to 4.12.14-150100.197.114.2
kernel-zfcpdump-man - update to 4.12.14-150100.197.114.2
kernel-vanilla-debuginfo - update to 4.12.14-150100.197.114.2
kernel-vanilla - update to 4.12.14-150100.197.114.2
kernel-zfcpdump-debuginfo - update to 4.12.14-150100.197.114.2
kernel-vanilla-base - update to 4.12.14-150100.197.114.2
kernel-default-livepatch-devel - update to 4.12.14-150100.197.114.2
kernel-default-livepatch - update to 4.12.14-150100.197.114.2
kernel-vanilla-base-debuginfo - update to 4.12.14-150100.197.114.2
kernel-zfcpdump-debugsource - update to 4.12.14-150100.197.114.2
reiserfs-kmp-default-debuginfo - update to 4.12.14-150100.197.114.2
reiserfs-kmp-default - update to 4.12.14-150100.197.114.2

• https://lkml.org/lkml/2018/3/7/1116
• https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.74
• https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.160
• https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.131
• https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.18.12

• Multiple vulnerabilities in Linux Kernel
• Red Hat update for kernel-rt
• Red Hat update for kernel
• Amazon Linux AMI update for kernel
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• Multiple vulnerabilities in DELL Secure Connect Gateway Security
• Multiple vulnerabilities in Dell Storage Monitoring and Reporting (SMR)
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel