what you don't know can hurt you
Home Files News &[SERVICES_TAB]About Contact Add New
Showing 1 - 4 of 4 RSS Feed

CVE-2017-1000255

Status Candidate

Overview

On Linux running on PowerPC hardware (Power8 or later) a user process can craft a signal frame and then do a sigreturn so that the kernel will take an exception (interrupt), and use the r1 value *from the signal frame* as the kernel stack pointer. As part of the exception entry the content of the signal frame is written to the kernel stack, allowing an attacker to overwrite arbitrary locations with arbitrary values. The exception handling does produce an oops, and a panic if panic_on_oops=1, but only after kernel memory has been over written. This flaw was introduced in commit: "5d176f751ee3 (powerpc: tm: Enable transactional memory (TM) lazily for userspace)" which was merged upstream into v4.9-rc1. Please note that kernels built with CONFIG_PPC_TRANSACTIONAL_MEM=n are not vulnerable.

Related Files

Red Hat Security Advisory 2018-0654-01
Posted Apr 11, 2018
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2018-0654-01 - The kernel-alt packages provide the Linux kernel version 4.x. The following packages have been upgraded to a later upstream version: kernel-alt. Issues addressed include buffer overflow, bypass, and denial of service vulnerabilities.

tags | advisory, denial of service, overflow, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2017-1000255, CVE-2017-1000410, CVE-2017-11473, CVE-2017-12190, CVE-2017-15129, CVE-2017-15299, CVE-2017-17448, CVE-2017-17449, CVE-2018-1000004, CVE-2018-6927
SHA-256 | 46213a5d7256ccc486e09644da5d4a3741fa2506819b7e2725344f3ca8bb31cb
Ubuntu Security Notice USN-3487-1
Posted Nov 22, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3487-1 - It was discovered that the KVM subsystem in the Linux kernel did not properly keep track of nested levels in guest page tables. A local attacker in a guest VM could use this to cause a denial of service or possibly execute arbitrary code in the host OS. It was discovered that on the PowerPC architecture, the kernel did not properly sanitize the signal stack when handling sigreturn. 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
systems | linux, ubuntu
advisories | CVE-2017-1000255, CVE-2017-12153, CVE-2017-12154, CVE-2017-12188, CVE-2017-12190, CVE-2017-12192, CVE-2017-14156, CVE-2017-14489, CVE-2017-14954, CVE-2017-15265, CVE-2017-15537, CVE-2017-15649, CVE-2017-16525, CVE-2017-16526, CVE-2017-16527, CVE-2017-16529, CVE-2017-16530, CVE-2017-16531, CVE-2017-16533, CVE-2017-16534
SHA-256 | 5d3daa3acae196e215ffb752dacad9fbeacb9381db28059612dbc4bf68e35c68
Ubuntu Security Notice USN-3443-2
Posted Oct 11, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3443-2 - USN-3443-1 fixed vulnerabilities in the Linux kernel for Ubuntu 17.04. This update provides the corresponding updates for the Linux Hardware Enablement kernel from Ubuntu 17.04 for Ubuntu 16.04 LTS. It was discovered that on the PowerPC architecture, the kernel did not properly sanitize the signal stack when handling sigreturn. 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
systems | linux, ubuntu
advisories | CVE-2017-1000255, CVE-2017-14106
SHA-256 | 5c273dbcfa4fc131f8caefa862ef0f9c20f8cdc948d57b8c155a6acf896ceb70
Ubuntu Security Notice USN-3443-1
Posted Oct 11, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3443-1 - It was discovered that on the PowerPC architecture, the kernel did not properly sanitize the signal stack when handling sigreturn. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. Andrey Konovalov discovered that a divide-by-zero error existed in the TCP stack implementation in the Linux kernel. A local attacker could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local, tcp
systems | linux, ubuntu
advisories | CVE-2017-1000255, CVE-2017-14106
SHA-256 | 457c630329cf0d0feb195089191ce4f05331adfbb5f0f6cd7ad55a13ca9cb9d0
Page 1 of 1
Back1Next

File Archive:

August 2022

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    Aug 1st
    20 Files
  • 2
    Aug 2nd
    4 Files
  • 3
    Aug 3rd
    6 Files
  • 4
    Aug 4th
    55 Files
  • 5
    Aug 5th
    16 Files
  • 6
    Aug 6th
    0 Files
  • 7
    Aug 7th
    0 Files
  • 8
    Aug 8th
    13 Files
  • 9
    Aug 9th
    13 Files
  • 10
    Aug 10th
    34 Files
  • 11
    Aug 11th
    16 Files
  • 12
    Aug 12th
    0 Files
  • 13
    Aug 13th
    0 Files
  • 14
    Aug 14th
    0 Files
  • 15
    Aug 15th
    0 Files
  • 16
    Aug 16th
    0 Files
  • 17
    Aug 17th
    0 Files
  • 18
    Aug 18th
    0 Files
  • 19
    Aug 19th
    0 Files
  • 20
    Aug 20th
    0 Files
  • 21
    Aug 21st
    0 Files
  • 22
    Aug 22nd
    0 Files
  • 23
    Aug 23rd
    0 Files
  • 24
    Aug 24th
    0 Files
  • 25
    Aug 25th
    0 Files
  • 26
    Aug 26th
    0 Files
  • 27
    Aug 27th
    0 Files
  • 28
    Aug 28th
    0 Files
  • 29
    Aug 29th
    0 Files
  • 30
    Aug 30th
    0 Files
  • 31
    Aug 31st
    0 Files

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2022 Packet Storm. All rights reserved.

Hosting By
Rokasec
close