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CVE-2021-3543

Status Candidate

Overview

A flaw null pointer dereference in the Nitro Enclaves kernel driver was found in the way that Enclaves VMs forces closures on the enclave file descriptor. A local user of a host machine could use this flaw to crash the system or escalate their privileges on the system.

Related Files

Ubuntu Security Notice USN-4997-2
Posted Jun 28, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4997-2 - USN-4997-1 fixed vulnerabilities in the Linux kernel for Ubuntu 21.04. This update provides the corresponding updates for the Linux KVM kernel for Ubuntu 21.04. Norbert Slusarek discovered a race condition in the CAN BCM networking protocol of the Linux kernel leading to multiple use-after-free vulnerabilities. A local attacker could use this issue to execute arbitrary code. Various other issues were also addressed.

tags | advisory, arbitrary, kernel, local, vulnerability, protocol
systems | linux, ubuntu
advisories | CVE-2020-24586, CVE-2020-24587, CVE-2020-24588, CVE-2020-26139, CVE-2020-26141, CVE-2020-26145, CVE-2020-26147, CVE-2021-23133, CVE-2021-23134, CVE-2021-31440, CVE-2021-31829, CVE-2021-32399, CVE-2021-33034, CVE-2021-33200, CVE-2021-3506, CVE-2021-3543, CVE-2021-3609
MD5 | 434b3d99e74ec911fad05d97ac12ede3
Ubuntu Security Notice USN-5001-1
Posted Jun 23, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5001-1 - Norbert Slusarek discovered a race condition in the CAN BCM networking protocol of the Linux kernel leading to multiple use-after-free vulnerabilities. A local attacker could use this issue to execute arbitrary code. Mathy Vanhoef discovered that the Linux kernel’s WiFi implementation did not properly clear received fragments from memory in some situations. A physically proximate attacker could possibly use this issue to inject packets or expose sensitive information. Various other issues were also addressed.

tags | advisory, arbitrary, kernel, local, vulnerability, protocol
systems | linux, ubuntu
advisories | CVE-2020-24586, CVE-2020-24587, CVE-2020-24588, CVE-2020-26139, CVE-2020-26141, CVE-2020-26145, CVE-2020-26147, CVE-2021-23133, CVE-2021-23134, CVE-2021-31440, CVE-2021-32399, CVE-2021-33034, CVE-2021-3506, CVE-2021-3543, CVE-2021-3609
MD5 | 320e070d4dba568bc108fe47f99adda7
Ubuntu Security Notice USN-4997-1
Posted Jun 23, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4997-1 - Norbert Slusarek discovered a race condition in the CAN BCM networking protocol of the Linux kernel leading to multiple use-after-free vulnerabilities. A local attacker could use this issue to execute arbitrary code. Piotr Krysiuk discovered that the eBPF implementation in the Linux kernel did not properly enforce limits for pointer operations. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local, vulnerability, protocol
systems | linux, ubuntu
advisories | CVE-2020-24586, CVE-2020-24587, CVE-2020-24588, CVE-2020-26139, CVE-2020-26141, CVE-2020-26145, CVE-2020-26147, CVE-2021-23133, CVE-2021-23134, CVE-2021-31440, CVE-2021-31829, CVE-2021-32399, CVE-2021-33034, CVE-2021-33200, CVE-2021-3506, CVE-2021-3543, CVE-2021-3609
MD5 | e6c599a433cfc14527872dc0839296f3
Red Hat Security Advisory 2021-2286-01
Posted Jun 15, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-2286-01 - Red Hat OpenShift Container Platform is Red Hat's cloud computing Kubernetes application platform solution designed for on-premise or private cloud deployments. This advisory contains the container images for Red Hat OpenShift Container Platform 4.7.16. Issues addressed include a remote shell upload vulnerability.

tags | advisory, remote, shell
systems | linux, redhat
advisories | CVE-2021-27219, CVE-2021-3121, CVE-2021-3501, CVE-2021-3543
MD5 | 3108f712077cfbeb44524f6cf709fed5
Red Hat Security Advisory 2021-2168-01
Posted Jun 1, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-2168-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2021-3501, CVE-2021-3543
MD5 | 695d4d0dca0e813dffc148909f48d3e1
Red Hat Security Advisory 2021-2169-01
Posted Jun 1, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-2169-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2021-3501, CVE-2021-3543
MD5 | 9803a617bbcda2de283725b5349d6ac7
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