Stack-based buffer overflow in Linux kernel - CVE-2020-10942

Vulnerability identifier: #VU27309

CSH Severity: Low

CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2020-10942

CWE-ID: CWE-121

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error within the get_raw_socket() function in drivers/vhost/net.c due to lack of validation of the sk_family field. A local user can perform a specially crafted system call, trigger stack overflow and crash the kernel.

Linux kernel
Amazon Linux AMI
Anolis OS
Red Hat Enterprise Linux for Real Time
Red Hat Enterprise Linux for Real Time for NFV
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 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
Slackware Linux
kernel (Red Hat package)
kernel-rt (Red Hat package)
linux-4.4.227/kernel-modules
linux-4.4.227/kernel-huge
linux-4.4.227/kernel-generic
linux-4.4.227/kernel-headers
kernel-tools-libs-devel
python-perf
perf
kernel-tools-libs
kernel-tools
kernel-headers
kernel-devel
kernel-debug-devel
kernel-debug
kernel
bpftool
IBM QRadar Network Security

Install updates from vendor's website.

Linux kernel - update to 5.5.8
kernel (Red Hat package) - addressed in versions 3.10.0-1160.el7, 4.18.0-240.el8
kernel-rt (Red Hat package) - update to 3.10.0-1160.rt56.1131.el7
linux-4.4.227/kernel-modules - update to 4.4.227
linux-4.4.227/kernel-huge - update to 4.4.227
linux-4.4.227/kernel-generic - update to 4.4.227
linux-4.4.227/kernel-headers - update to 4.4.227_smp
kernel-tools-libs-devel - update to 4.19.91-26
python-perf - update to 4.19.91-26
perf - update to 4.19.91-26
kernel-tools-libs - update to 4.19.91-26
kernel-tools - update to 4.19.91-26
kernel-headers - update to 4.19.91-26
kernel-devel - update to 4.19.91-26
kernel-debug-devel - update to 4.19.91-26
kernel-debug - update to 4.19.91-26
kernel - update to 4.19.91-26
bpftool - update to 4.19.91-26
IBM QRadar Network Security - addressed in versions 5.4.0.17, 5.5.0.12

• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.5.8
• https://git.kernel.org/linus/42d84c8490f9f0931786f1623191fcab397c3d64
• https://lkml.org/lkml/2020/2/15/125
• https://security.netapp.com/advisory/ntap-20200403-0003/

• Stack-based buffer overflow in Linux kernel
• Amazon Linux AMI update for kernel
• Multiple vulnerabilities in IBM QRadar Network Security
• Anolis OS update for kernel(ANCK)4.19
• Slackware Linux update for kernel
• Red Hat Enterprise Linux 8 update for kernel
• Red Hat Enterprise Linux 7 update for kernel-rt
• Red Hat Enterprise Linux 7 update for kernel