Exploit for Improper Access Control in Xen

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PT-2021-2376 · Linux +4 · Linux Kernel +4

Name of the Vulnerable Software and Affected Versions: Linux kernel affected versions not specified Description: An out-of-bounds access flaw was found in the Linux kernel's implementation of the eBPF code verifier in the way a user running the eBPF script calls dev map init map or sock map alloc...

(0Day) Linux Kernel eBPF Improper Input Validation Privilege Escalation Vulnerability

This vulnerability allows local attackers to escalate privileges on affected installations of Linux Kernel. 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...

CVE-2020-27194

An out-of-bounds access flaw was found in the Linux kernel’s implementation of the eBPF Berkeley Packet Filter code verifier, where an incorrect register bounds calculation occurs while in use of 64-bit values with scalar32minmaxor that is BPFOR. This flaw allows an unprivileged local user until...

Internet Bug Bounty: [CVE-2020-27194] Linux kernel: eBPF verifier bug in `or` binary operation tracking function leads to LPE

CVE-2020-27194 is a eBPF verifier bug that allows an unprivileged attacker to create BPF socket filter programs that can read and write Out of Bounds, trough which an arbitrary kernel read write can be achieved. I'm taking the root cause explanation from the patch email: Simon reported an issue...

CVE-2019-7308

A bypass was found for the Spectre v1 hardening in the eBPF engine of the Linux kernel. The code in the kernel/bpf/verifier.c performs undesirable out-of-bounds speculation on pointer arithmetic in various cases, including cases of different branches with different state or limits to sanitize,...

CVE-2020-8835

An out-of-bounds access flaw was found in the Linux kernel’s implementation of the eBPF code verifier, where an incorrect register bounds calculation while checking 32-bit instructions in an eBPF program occurs. This flaw allows an unprivileged user or process to execute eBPF programs to crash th...

[ASA-202004-2] linux-hardened: privilege escalation

Arch Linux Security Advisory ASA-202004-2 ========================================= Severity: High Date : 2020-04-01 CVE-ID : CVE-2020-8835 Package : linux-hardened Type : privilege escalation Remote : No Link : https://security.archlinux.org/AVG-1120 Summary ======= The package linux-hardened...

(Pwn2Own) Linux Kernel eBPF Improper Input Validation Privilege Escalation Vulnerability

This vulnerability allows local attackers to escalate privileges on affected installations of Linux Kernel. 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...

CVE-2017-16996

An arbitrary memory r/w access issue was found in the Linux kernel compiled with the eBPF bpf2 system call CONFIGBPFSYSCALL support. The issue could occur due to calculation errors in the eBPF verifier module, triggered by user supplied malicious BPF program. An unprivileged user could use this...

CVE-2017-16995

An arbitrary memory r/w access issue was found in the Linux kernel compiled with the eBPF bpf2 system call CONFIGBPFSYSCALL support. The issue could occur due to calculation errors in the eBPF verifier module, triggered by user supplied malicious BPF program. An unprivileged user could use this...

Amazon Linux AMI : kernel (ALAS-2019-1201)

A flaw was found in the Linux kernel's implementation of logical link control and adaptation protocol L2CAP, part of the Bluetooth stack in the l2capparseconfrsp and l2capparseconfreq functions. An attacker with physical access within the range of standard Bluetooth transmission can create a...

Amazon Linux 2 : kernel (ALAS-2019-1201)

A flaw was found in the Linux kernel's implementation of logical link control and adaptation protocol L2CAP, part of the Bluetooth stack in the l2capparseconfrsp and l2capparseconfreq functions. An attacker with physical access within the range of standard Bluetooth transmission can create a...

Important: kernel

Issue Overview: A flaw was found in the Linux kernel's implementation of logical link control and adaptation protocol L2CAP, part of the Bluetooth stack in the l2capparseconfrsp and l2capparseconfreq functions. An attacker with physical access within the range of standard Bluetooth transmission c...

Important: kernel

Issue Overview: A flaw was found in the Linux kernel's implementation of logical link control and adaptation protocol L2CAP, part of the Bluetooth stack in the l2capparseconfrsp and l2capparseconfreq functions. An attacker with physical access within the range of standard Bluetooth transmission c...

Ubuntu: Security Advisory (USN-3931-1)

The remote host is missing an update for the SPDX-FileCopyrightText: 2019 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

Ubuntu 18.04 LTS : Linux kernel vulnerabilities (USN-3931-1)

The remote Ubuntu 18.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-3931-1 advisory. M. Vefa Bicakci and Andy Lutomirski discovered that the kernel did not properly set up all arguments to an error handler callback used when running as a...

USN-3931-1: Linux kernel vulnerabilities

M. Vefa Bicakci and Andy Lutomirski discovered that the kernel did not properly set up all arguments to an error handler callback used when running as a paravirtualized guest. An unprivileged attacker in a paravirtualized guest VM could use this to cause a denial of service guest VM crash...

USN-3930-2: Linux kernel (HWE) vulnerabilities

USN-3930-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.10. This update provides the corresponding updates for the Linux Hardware Enablement HWE kernel from Ubuntu 18.10 for Ubuntu 18.04 LTS. Mathias Payer and Hui Peng discovered a use-after-free vulnerability in the Advanced Linux Sou...

USN-3930-1: Linux kernel vulnerabilities

Mathias Payer and Hui Peng discovered a use-after-free vulnerability in the Advanced Linux Sound Architecture ALSA subsystem. A physically proximate attacker could use this to cause a denial of service system crash. CVE-2018-19824 Shlomi Oberman, Yuli Shapiro, and Ran Menscher discovered an...