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SUSE-SU-2021:3718-1

Опубликовано: 17 нояб. 2021
Источник: suse-cvrf

Описание

Security update for the Linux Kernel (Live Patch 6 for SLE 15 SP3)

This update for the Linux Kernel 5.3.18-59_24 fixes several issues.

The following security issues were fixed:

  • CVE-2021-34866: Fixed possible eBPF Type Confusion privilege escalation vulnerability via eBPF type confusion (bsc#1191646).
  • CVE-2021-41864: Fixed an integer overflow with a resultant out-of-bounds write in prealloc_elems_and_freelist in kernel/bpf/stackmap.c (bsc#1191318).

Список пакетов

SUSE Linux Enterprise Live Patching 15 SP3
kernel-livepatch-5_3_18-59_13-default-6-2.2
kernel-livepatch-5_3_18-59_24-default-2-2.2

Ссылки

Описание

This vulnerability allows local attackers to escalate privileges on affected installations of Linux Kernel 5.14-rc3. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the handling of eBPF programs. The issue results from the lack of proper validation of user-supplied eBPF programs, which can result in a type confusion condition. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the kernel. Was ZDI-CAN-14689.

Затронутые продукты
SUSE Linux Enterprise Live Patching 15 SP3:kernel-livepatch-5_3_18-59_13-default-6-2.2
SUSE Linux Enterprise Live Patching 15 SP3:kernel-livepatch-5_3_18-59_24-default-2-2.2
Ссылки

Описание

prealloc_elems_and_freelist in kernel/bpf/stackmap.c in the Linux kernel before 5.14.12 allows unprivileged users to trigger an eBPF multiplication integer overflow with a resultant out-of-bounds write.

Затронутые продукты
SUSE Linux Enterprise Live Patching 15 SP3:kernel-livepatch-5_3_18-59_13-default-6-2.2
SUSE Linux Enterprise Live Patching 15 SP3:kernel-livepatch-5_3_18-59_24-default-2-2.2
Ссылки