Описание
Security update for the Linux Kernel (Live Patch 5 for SLE 15 SP3)
This update for the Linux Kernel 5.3.18-59_19 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
Ссылки
- Link for SUSE-SU-2021:3742-1
- E-Mail link for SUSE-SU-2021:3742-1
- SUSE Security Ratings
- SUSE Bug 1191318
- SUSE Bug 1191646
- SUSE CVE CVE-2021-34866 page
- SUSE CVE CVE-2021-41864 page
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
Ссылки
- CVE-2021-34866
- SUSE Bug 1191645
- SUSE Bug 1191646
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
Ссылки
- CVE-2021-41864
- SUSE Bug 1191317
- SUSE Bug 1191318