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...

Debian DLA-1715-1 : linux-4.9 security update (Spectre)

Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks. CVE-2017-18249 A race condition was discovered in the disk space allocator of F2FS. A user with access to an F2FS volume could use this to cause a deni...

Linux Kernel 4.4 rtnetlink Stack Memory Disclosure

/ Briefs - CVE-2016-4486 has discovered and reported by Kangjie Lu. - This is local exploit against the CVE-2016-4486. Tested version - Distro : Ubuntu 16.04 - Kernel version : 4.4.0-21-generic - Arch : x8664 Prerequisites - None Goal - Leak kernel stack base address of current process by...

Linux Kernel 4.4 - 'rtnetlink' Stack Memory Disclosure

/ Briefs - CVE-2016-4486 has discovered and reported by Kangjie Lu. - This is local exploit against the CVE-2016-4486. Tested version - Distro : Ubuntu 16.04 - Kernel version : 4.4.0-21-generic - Arch : x8664 Prerequisites - None Goal - Leak kernel stack base address of current process by...

Linux Kernel 4.4 - rtnetlink Stack Memory Disclosure

Linux Kernel 4.4 - rtnetlink Stack Memory Disclosure / Briefs - CVE-2016-4486 has discovered and reported by Kangjie Lu. - This is local exploit against the CVE-2016-4486. Tested version - Distro : Ubuntu 16.04 - Kernel version : 4.4.0-21-generic - Arch : x8664 Prerequisites - None Goal - Leak...

Linux Kernel 4.13.9 (Ubuntu 16.04 Fedora 27) - Local Privilege Escalation

Linux Kernel 4.13.9 Ubuntu 16.04 Fedora 27 - Local Privilege Escalation / Credit @bleidl, this is a slight modification to his original POC https://github.com/brl/grlh/blob/master/get-rekt-linux-hardened.c For details on how the exploit works, please visit...

Exploit for Improper Restriction of Operations within the Bounds of a Memory Buffer in Linux Linux_Kernel

Vulnerability Description Ubuntu is an open-source GNU/Linux o...

Ubuntu本地提权漏洞(CVE-2017-16995)

Since commit f1174f77b50c "bpf/verifier: rework value tracking", the eBPF range tracking is security-relevant for the verification of eBPF code provided by unprivileged users. Therefore, any tiny slip-up in the arithmetic range tracking now turns into an arbitrary read+write in the full kernel...

eBPF 4.9-stable Verifier Bug Backported

eBPF verifier bug backported to 4.9-stable Moving this one to a separate bug report... Commit https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=332270fdc8b6fba07d059a9ad44df9e1a2ad4529 adds functionality that permits performing addition on PTRTOSTACK stack pointer with...

[ASA-201801-3] linux-zen: multiple issues

Arch Linux Security Advisory ASA-201801-3 ========================================= Severity: High Date : 2018-01-05 CVE-ID : CVE-2017-16995 CVE-2017-16996 CVE-2017-17449 CVE-2017-17558 CVE-2017-17712 CVE-2017-17805 CVE-2017-17806 CVE-2017-17852 CVE-2017-17853 CVE-2017-17854 CVE-2017-17855...

CPU hardware vulnerable to side-channel attacks

Overview CPU hardware implementations are vulnerable to cache side-channel attacks. These vulnerabilities are referred to as Meltdown and Spectre. Description CPU hardware implementations are vulnerable to side-channel attacks referred to as Meltdown and Spectre. Both Spectre and Meltdown take...

Linux Kernel >= 4.9 eBPF memory corruption bugs Vulnerability

Exploit for linux platform in category dos / poc Hi! A few BPF verifier bugs in the Linux kernel, most of which can be used for controlled memory corruption, have been fixed over the last days. One of the bugs was introduced in 4.9, the others were only introduced in 4.14. The fixes are in the ne...

Linux: eBPF verifier log leaks lower half of map pointer

When the eBPF verifier kernel/bpf/verifier.c runs in verbose mode, it dumps all processed instructions to a user-accessible buffer in human-readable form using printbpfinsn. For instructions with class BPFLD and mode BPFIMM, it prints the raw 32-bit value: else if class == BPFLD if BPFMODEinsn-co...

Linux Kernel 4.11 - eBPF Verifier Log Leaks Lower Half of map Pointer Exploit

Exploit for linux platform in category dos / poc / Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1251 When the eBPF verifier kernel/bpf/verifier.c runs in verbose mode, it dumps all processed instructions to a user-accessible buffer in human-readable form using printbpfinsn. F...

Linux Kernel 4.11 - eBPF Verifier Log Leaks Lower Half of map Pointer

Linux Kernel 4.11 - eBPF Verifier Log Leaks Lower Half of map Pointer / Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1251 When the eBPF verifier kernel/bpf/verifier.c runs in verbose mode, it dumps all processed instructions to a user-accessible buffer in human-readable form...

Linux Kernel 4.11 - eBPF Verifier Log Leaks Lower Half of map Pointer

/ Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1251 When the eBPF verifier kernel/bpf/verifier.c runs in verbose mode, it dumps all processed instructions to a user-accessible buffer in human-readable form using printbpfinsn. For instructions with class BPFLD and mode BPFIMM,...

Ubuntu: Security Advisory (USN-3007-1)

The remote host is missing an update for the SPDX-FileCopyrightText: 2016 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...