SB2023080173 - SUSE update for the Linux Kernel (Live Patch 0 for SLE 15 SP5)

Description

This security bulletin contains information about 4 secuirty vulnerabilities.

1) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2023-2002)

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

The vulnerability exists due to improper permissions check in the Bluetooth subsystem when handling ioctl system calls of HCI sockets. A local user can acquire a trusted socket, leading to unauthorized execution of management commands.

2) Use-after-free (CVE-ID: CVE-2023-2235)

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

The vulnerability exists due to a use-after-free error in the Linux Kernel Performance Events system. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.

3) Double free (CVE-ID: CVE-2023-33952)

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

The vulnerability exists due to a boundary error when handling vmw_buffer_object objects within the vmw_user_bo_lookup() function in drivers/gpu/drm/vmwgfx/vmwgfx_bo.c. A local user can trigger a double free error and execute arbitrary code on the target system with elevated privileges.

4) Out-of-bounds write (CVE-ID: CVE-2023-35788)

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

The vulnerability exists due to a boundary error within the fl_set_geneve_opt() function in net/sched/cls_flower.c in Linux kernel. A local user can trigger an out-of-bounds write and execute arbitrary code with elevated privileges.

Remediation

Install update from vendor's website.

References

• https://www.suse.com/support/update/announcement/2023/suse-su-20233116-1/