USN-5086-1: Linux kernel vulnerability

Johan Almbladh discovered that the eBPF JIT implementation for IBM s390x systems in the Linux kernel miscompiled operations in some situations, allowing circumvention of the BPF verifier. A local attacker could use this to cause a denial of service system crash or possibly execute arbitrary code...

CVE-2020-0430

An out of bounds memory read flaw was found in the Linux kernel’s implementation of the eBPF code verifier. A user passing corrupted data to a helper function could access data inside the adjustptrminmaxvals function. By default, the eBPF verifier is only accessible to users with CAPSYSADMIN...

Metasploit Wrap-Up

Capture Credentials with our new SMB Server Our own Adam Galway revamped the old SMB capture module and now supports NTLMv1 and NTLMv2, as well as SMB1, SMB2 and SMB3. This was possible thanks to @zeroSteiner's new RubySMB server implementation. Metasploit is now able to capture NTLM hashes from...

Linux eBPF ALU32 32-bit Invalid Bounds Tracking LPE

Linux kernels from 5.7-rc1 prior to 5.13-rc4, 5.12.4, 5.11.21, and 5.10.37 are vulnerable to a bug in the eBPF verifier's verification of ALU32 operations in the scalar32minmaxand function when performing AND operations, whereby under certain conditions the bounds of a 32 bit register would not b...

Linux eBPF ALU32 32-bit Invalid Bounds Tracking Local Privilege Escalation Exploit

Linux kernels from 5.7-rc1 prior to 5.13-rc4, 5.12.4, 5.11.21, and 5.10.37 are vulnerable to a bug in the eBPF verifier's verification of ALU32 operations in the scalar32minmaxand function when performing AND operations, whereby under certain conditions the bounds of a 32 bit register would not b...

Linux eBPF ALU32 32-bit Invalid Bounds Tracking Local Privilege Escalation

This module requires Metasploit: https://metasploit.com/download Current source: https://github.com/rapid7/metasploit-framework class MetasploitModule 'Linux eBPF ALU32 32-bit Invalid Bounds Tracking LPE', 'Description' = %q Linux kernels from 5.7-rc1 prior to 5.13-rc4, 5.12.4, 5.11.21, and 5.10....

PT-2021-4809 · Linux +3 · Linux Kernel +3

Name of the Vulnerable Software and Affected Versions: Linux Kernel version 5.14-rc3 Description: This issue allows local attackers to escalate privileges on affected installations. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit...

Privilege Escalation

linux-kvm is vulnerable to privilege escalation. The vulnerability exists due to the lack of proper validation of user-supplied eBPF programs prior to executing...

CVE-2021-38166

A flaw was found in the Linux kernel. An integer overflow can allow an out-of-bounds write when many elements are placed in a hash's bucket. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability. Mitigation The default Red Hat Enterpris...

CVE-2021-34556

A flaw was found in the Linux kernel, where a BPF program can obtain sensitive information from kernel memory via a Speculative Store Bypass side-channel attack. This issue occurs when the protection mechanism neglects the possibility of uninitialized memory locations on the BPF stack. The highes...

CVE-2021-35477

A flaw in the Linux kernel allows a privileged BPF program to obtain sensitive information from kernel memory via a Speculative Store Bypass side-channel in the eBPF subsystem Mitigation The default Red Hat Enterprise Linux kernel setting prevents unprivileged users from being able to use eBPF vi...

LSN-0079-1: Kernel Live Patch Security Notice

It was discovered that the eBPF implementation in the Linux kernel did not properly track bounds information for 32 bit registers when performing div and mod operations. A local attacker could use this to possibly execute arbitrary code.CVE-2021-3600 It was discovered that the virtual file system...

LSN-0079-1 Kernel Live Patch Security Notice

It was discovered that the eBPF implementation in the Linux kernel did not properly track bounds information for 32 bit registers when performing div and mod operations. A local attacker could use this to possibly execute arbitrary code.CVE-2021-3600 It was discovered that the virtual file system...

USN-5018-1 linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-gcp, linux-gcp-4.15, linux-hwe, linux-kvm, linux-oracle, linux-raspi2, linux-snapdragon vulnerabilities

It was discovered that the virtual file system implementation in the Linux kernel contained an unsigned to signed integer conversion error. A local attacker could use this to cause a denial of service system crash or execute arbitrary code. CVE-2021-33909 Piotr Krysiuk discovered that the eBPF...

USN-5018-1: Linux kernel vulnerabilities

It was discovered that the virtual file system implementation in the Linux kernel contained an unsigned to signed integer conversion error. A local attacker could use this to cause a denial of service system crash or execute arbitrary code. CVE-2021-33909 Piotr Krysiuk discovered that the eBPF...

Cilium - eBPF-based Networking, Security, And Observability

Cilium is open source software for providing and transparently securing network connectivity and loadbalancing between application workloads such as application containers or processes. Cilium operates at Layer 3/4 to provide traditional networking and security services as well as Layer 7 to...

Linux kernel buffer overflow vulnerability (CNVD-2021-54395)

Linux kernel is the kernel used by Linux, the open source operating system of the Linux Foundation in the United States. A security vulnerability exists in the Linux kernel. The vulnerability stems from the discovery that the eBPF ALU32 bounds trace for bitwise operations AND, OR and XOR does not...

Linux kernel buffer overflow vulnerability (CNVD-2021-54396)

Linux kernel is the kernel used by Linux, the open source operating system of the Linux Foundation in the United States. A security vulnerability exists in the Linux kernel. The vulnerability stems from the fact that eBPF RINGBUF bpfringbufreserve does not check if the allocated size is smaller...

CVE-2021-3600

A flaw was found in the Linux kernel’s eBPF verification code, where the eBPF 32-bit div/mod source register truncation could lead to out-of-bounds reads and writes. By default, accessing the eBPF verifier is only possible to privileged users with CAPSYSADMIN. This flaw allows a local user who ca...

USN-5000-1: Linux kernel vulnerabilities | Cloud Foundry

Severity High Vendor Canonical Ubuntu Versions Affected Canonical Ubuntu 18.04 Description 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...