exploit the possibilities
Home Files News &[SERVICES_TAB]About Contact Add New
Showing 1 - 2 of 2 RSS Feed

CVE-2019-18425

Status Candidate

Overview

An issue was discovered in Xen through 4.12.x allowing 32-bit PV guest OS users to gain guest OS privileges by installing and using descriptors. There is missing descriptor table limit checking in x86 PV emulation. When emulating certain PV guest operations, descriptor table accesses are performed by the emulating code. Such accesses should respect the guest specified limits, unless otherwise guaranteed to fail in such a case. Without this, emulation of 32-bit guest user mode calls through call gates would allow guest user mode to install and then use descriptors of their choice, as long as the guest kernel did not itself install an LDT. (Most OSes don't install any LDT by default). 32-bit PV guest user mode can elevate its privileges to that of the guest kernel. Xen versions from at least 3.2 onwards are affected. Only 32-bit PV guest user mode can leverage this vulnerability. HVM, PVH, as well as 64-bit PV guests cannot leverage this vulnerability. Arm systems are unaffected.

Related Files

Gentoo Linux Security Advisory 202003-56
Posted Mar 26, 2020
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 202003-56 - Multiple vulnerabilities have been found in Xen, the worst of which could allow for privilege escalation. Versions less than 4.12.0-r1 are affected.

tags | advisory, vulnerability
systems | linux, gentoo
advisories | CVE-2018-12126, CVE-2018-12127, CVE-2018-12130, CVE-2018-12207, CVE-2019-11091, CVE-2019-11135, CVE-2019-18420, CVE-2019-18421, CVE-2019-18423, CVE-2019-18424, CVE-2019-18425, CVE-2019-19577, CVE-2019-19578, CVE-2019-19580, CVE-2019-19581, CVE-2019-19582, CVE-2019-19583
SHA-256 | 7959dee17cd4227918a51fda5daa8418f726f545d628a763b80ddbb67566d1eb
Debian Security Advisory 4602-1
Posted Jan 15, 2020
Authored by Debian | Site debian.org

Debian Linux Security Advisory 4602-1 - Multiple vulnerabilities have been discovered in the Xen hypervisor, which could result in denial of service, guest-to-host privilege escalation or information leaks.

tags | advisory, denial of service, vulnerability
systems | linux, debian
advisories | CVE-2018-12126, CVE-2018-12127, CVE-2018-12130, CVE-2018-12207, CVE-2019-11091, CVE-2019-11135, CVE-2019-17340, CVE-2019-17341, CVE-2019-17342, CVE-2019-17343, CVE-2019-17344, CVE-2019-17345, CVE-2019-17346, CVE-2019-17347, CVE-2019-17348, CVE-2019-17349, CVE-2019-17350, CVE-2019-18420, CVE-2019-18421, CVE-2019-18422, CVE-2019-18423, CVE-2019-18424, CVE-2019-18425, CVE-2019-19577, CVE-2019-19578, CVE-2019-19579
SHA-256 | e5bfcc7743f4984f6ecac091e3a281590c7e7e3caf0c70d6d0dbc7576bed566f
Page 1 of 1
Back1Next

File Archive:

March 2024

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

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2022 Packet Storm. All rights reserved.

Services
Security Services
Hosting By
Rokasec
close