SB2021062113 - Red Hat Enterprise Linux 8.2 update for kernel
Published: June 21, 2021
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 4 secuirty vulnerabilities.
1) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2020-0466)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to unspecified error, related to I/O subsystem in kernel. A local user can elevated privileges on the system.
2) Race condition (CVE-ID: CVE-2020-12114)
The vulnerability allows a local user to perform a denial of service attack.
The vulnerability exists due to a race condition between threads updating mountpoint reference counter. A local user can exploit the race and crash the system.
3) Integer overflow (CVE-ID: CVE-2020-12362)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to integer overflow. A local user can run a specially crafted program to trigger integer overflow and execute arbitrary code with elevated privileges.
4) Path traversal (CVE-ID: CVE-2020-28374)
The vulnerability allows a remote user to perform directory traversal attacks.
The vulnerability exists due to input validation error when processing directory traversal sequences in drivers/target/target_core_xcopy.c in the Linux kernel. A remote user with access to iSCSI LUN can send a specially crafted XCOPY request and read or write arbitrary files on the system.
Remediation
Install update from vendor's website.