SB2020102058 - Red Hat Enterprise Linux 8 update for kernel-rt
Published: October 20, 2020
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 5 secuirty vulnerabilities.
1) Input validation error (CVE-ID: CVE-2020-12351)
The vulnerability allows a remote attacker to compromise the affected system.
The vulnerability exists due to insufficient validation of user-supplied input within the BlueZ implementation in Linux kernel. A remote attacker on the local network can pass specially crafted input to the application and execute arbitrary code on the system.
2) Improper access control (CVE-ID: CVE-2020-12352)
The vulnerability allows a remote attacker to gain access to sensitive information.
The vulnerability exists due to improper access restrictions in BlueZ implementation in Linux kernel. A remote attacker on the local network can pass specially crafted input to the application and gain access to sensitive information.
3) Out-of-bounds write (CVE-ID: CVE-2020-14331)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error within the Linux kernel’s implementation of the invert video code on VGA consoles. A local user with can run a specially crafted program to call VT_RESIZE IOCTL, trigger an out-of-bounds write and execute arbitrary code on the target system with elevated privileges.
4) Buffer overflow (CVE-ID: CVE-2020-14385)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error in the file system metadata validator in XFS. A local user can cause an inode with a valid, user-creatable extended attribute to be flagged as corrupt and shutdown the the filesystem.
5) Out-of-bounds write (CVE-ID: CVE-2020-14386)
The vulnerability allows a local privileged user to execute arbitrary code.
A flaw was found in the Linux kernel before 5.9-rc4. Memory corruption can be exploited to gain root privileges from unprivileged processes. The highest threat from this vulnerability is to data confidentiality and integrity.
Remediation
Install update from vendor's website.