Vulmon
Amazon Linux 2 Security Advisory: ALASKERNEL-5.4-2022-003
Advisory Release Date: 2022-01-12 00:00 Pacific
Advisory Updated Date: 2022-01-28 17:24 Pacific
A use-after-free flaw was found in the Linux kernel's NFC LLCP protocol implementation in the way the user performs manipulation with an unknown input for the llcp_sock_bind() function. This flaw allows a local user to crash or escalate their privileges on the system. (CVE-2020-25670)
A use-after-free flaw was found in the Linux kernel's NFC LLCP protocol implementation in the way the user triggers the llcp_sock_connect() function. This flaw allows a local user to crash the system. (CVE-2020-25671)
A memory leak in the Linux kernel's NFC LLCP protocol implementation was found in the way a user triggers the llcp_sock_connect() function. This flaw allows a local user to starve the resources, causing a denial of service. (CVE-2020-25672)
A vulnerability was found in Linux kernel where non-blocking socket in llcp_sock_connect() leads to leak and eventually hanging-up the system. (CVE-2020-25673)
A use-after-free flaw was found in the Linux kernel's SCTP socket functionality that triggers a race condition. This flaw allows a local user to escalate their privileges on the system. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability. (CVE-2021-23133)
A flaw was found in the Linux kernels eBPF implementation. By default, accessing the eBPF verifier is only accessible to privileged users with CAP_SYS_ADMIN. A local user with the ability to insert eBPF instructions can abuse a flaw in eBPF to corrupt memory. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability. (CVE-2021-29154)
A vulnerability was discovered in retrieve_ptr_limit in kernel/bpf/verifier.c in the Linux kernel mechanism to mitigate speculatively out-of-bounds loads (Spectre mitigation). In this flaw a local, special user privileged (CAP_SYS_ADMIN) BPF program running on affected systems may bypass the protection, and execute speculatively out-of-bounds loads from the kernel memory. This can be abused to extract contents of kernel memory via side-channel. (CVE-2021-29155)
A flaw was found in the Linux kernel's eBPF verification code. By default, accessing the eBPF verifier is only accessible to privileged users with CAP_SYS_ADMIN. This flaw allows a local user who can insert eBPF instructions, to use the eBPF verifier to abuse a spectre-like flaw and infer all system memory. The highest threat from this vulnerability is to confidentiality. (CVE-2021-31829)
Affected Packages:
kernel
Issue Correction:
Run yum update kernel to update your system.
aarch64:
kernel-5.4.117-58.216.amzn2.aarch64
kernel-headers-5.4.117-58.216.amzn2.aarch64
kernel-debuginfo-common-aarch64-5.4.117-58.216.amzn2.aarch64
perf-5.4.117-58.216.amzn2.aarch64
perf-debuginfo-5.4.117-58.216.amzn2.aarch64
python-perf-5.4.117-58.216.amzn2.aarch64
python-perf-debuginfo-5.4.117-58.216.amzn2.aarch64
kernel-tools-5.4.117-58.216.amzn2.aarch64
kernel-tools-devel-5.4.117-58.216.amzn2.aarch64
kernel-tools-debuginfo-5.4.117-58.216.amzn2.aarch64
bpftool-5.4.117-58.216.amzn2.aarch64
bpftool-debuginfo-5.4.117-58.216.amzn2.aarch64
kernel-devel-5.4.117-58.216.amzn2.aarch64
kernel-debuginfo-5.4.117-58.216.amzn2.aarch64
i686:
kernel-headers-5.4.117-58.216.amzn2.i686
src:
kernel-5.4.117-58.216.amzn2.src
x86_64:
kernel-5.4.117-58.216.amzn2.x86_64
kernel-headers-5.4.117-58.216.amzn2.x86_64
kernel-debuginfo-common-x86_64-5.4.117-58.216.amzn2.x86_64
perf-5.4.117-58.216.amzn2.x86_64
perf-debuginfo-5.4.117-58.216.amzn2.x86_64
python-perf-5.4.117-58.216.amzn2.x86_64
python-perf-debuginfo-5.4.117-58.216.amzn2.x86_64
kernel-tools-5.4.117-58.216.amzn2.x86_64
kernel-tools-devel-5.4.117-58.216.amzn2.x86_64
kernel-tools-debuginfo-5.4.117-58.216.amzn2.x86_64
bpftool-5.4.117-58.216.amzn2.x86_64
bpftool-debuginfo-5.4.117-58.216.amzn2.x86_64
kernel-devel-5.4.117-58.216.amzn2.x86_64
kernel-debuginfo-5.4.117-58.216.amzn2.x86_64