SB2022081743 - SUSE update for the Linux Kernel 

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Main Vulnerability Database SB2022081743

SB2022081743 - SUSE update for the Linux Kernel

Published: August 17, 2022 Updated: October 19, 2022

Security Bulletin ID SB2022081743
Severity
Medium
Patch available
YES
Number of vulnerabilities 8
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

Medium 13% Low 88%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 8 secuirty vulnerabilities.


1) Race condition (CVE-ID: CVE-2020-36557)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a race condition between the VT_DISALLOCATE IOCTL and closing/opening of ttys. A local user can exploit the race and gain unauthorized access to sensitive information and escalate privileges on the system.


2) NULL pointer dereference (CVE-ID: CVE-2020-36558)

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

The vulnerability exists due to a NULL pointer dereference error in the Linux kernel before 5.5.7 involving a VT_RESIZEX. A local user can perform a denial of service (DoS) attack.


3) Exposure of Resource to Wrong Sphere (CVE-ID: CVE-2021-26341)

The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability exists due to some AMD CPUs may transiently execute beyond unconditional direct branches. A local user can gain unauthorized access to sensitive information on the system.


4) Out-of-bounds write (CVE-ID: CVE-2021-33655)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error in FBIOPUT_VSCREENINFO IOCTL. A local user can trigger an out-of-bounds write error and execute arbitrary code with elevated privileges.


5) Out-of-bounds write (CVE-ID: CVE-2021-33656)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error when setting font with malicous data by ioctl cmd PIO_FONT. A local user can trigger an out-of-bounds write and execute arbitrary code with elevated privileges.


6) Out-of-bounds read (CVE-ID: CVE-2022-1462)

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

The vulnerability exists due to a boundary condition within the the Linux kernel’s TeleTYpe subsystem caused by a race condition when using ioctls TIOCSPTLCK and TIOCGPTPEER and TIOCSTI and TCXONC with leakage of memory file. A local user can trigger an out-of-bounds read error and crash the system or read random kernel memory.


7) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2022-20166)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to unspecified error in the Linux Kernel. A local user can bypass security restrictions and escalate privileges on the system.


8) Input validation error (CVE-ID: CVE-2022-36946)

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

The vulnerability exists due to insufficient validation of user-supplied input within the nfqnl_mangle() function in net/netfilter/nfnetlink_queue.c in the Linux kernel when processing IPv6 packets. A remote attacker can send specially crafted packets to the system and perform a denial of service (DoS) attack.


Remediation

Install update from vendor's website.

References