SB2021053007 - Red Hat Enterprise Linux 8.1 update for kpatch-patch

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Main Vulnerability Database SB2021053007

SB2021053007 - Red Hat Enterprise Linux 8.1 update for kpatch-patch

Published: May 30, 2021

Security Bulletin ID SB2021053007
Severity
Medium
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

Medium 33% Low 67%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 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) 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.



3) Use-after-free (CVE-ID: CVE-2021-3347)

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

The vulnerability exists due to a use-after-free error when handling PI futexes. A local user can run a specially crafted program to trigger a use-after-free error and execute arbitrary code with elevated privileges.



Remediation

Install update from vendor's website.

References