Executive Summary



This Alert is flagged as TOP 25 Common Weakness Enumeration from CWE/SANS. For more information, you can read this.
Summary
Title Xen: Privilege Escalation
Informations
Name GLSA-201703-07 First vendor Publication 2017-03-28
Vendor Gentoo Last vendor Modification 2017-03-28
Severity (Vendor) N/A Revision N/A

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:S/C:C/I:C/A:C)
Cvss Base Score 9 Attack Range Network
Cvss Impact Score 10 Attack Complexity Low
Cvss Expoit Score 8 Authentication Requires single instance
Calculate full CVSS 2.0 Vectors scores

Detail

Synopsis

A vulnerability in Xen's bundled QEMU version might allow privilege escalation.

Background

Xen is a bare-metal hypervisor.

Description

In CIRRUS_BLTMODE_MEMSYSSRC mode the bitblit copy routine cirrus_bitblt_cputovideo fails to check wethehr the specified memory region is safe.

Impact

A local attacker could potentially execute arbitrary code with privileges of Xen (QEMU) process on the host, gain privileges on the host system, or cause a Denial of Service condition.

Workaround

Running guests in Paravirtualization (PV) mode, or running guests in Hardware-assisted virtualizion (HVM) utilizing stub domains mitigate the issue.

Running HVM guests with the device model in a stubdomain will mitigate the issue.

Changing the video card emulation to stdvga (stdvga=1, vga="stdvga", in the xl domain configuration) will avoid the vulnerability.

Resolution

All Xen Tools users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot -v ">=app-emulation/xen-tools-4.7.1-r8"

References

[ 1 ] CVE-2017-2620 : http://nvd.nist.gov/nvd.cfm?cvename=CVE-2017-2620

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website:

https://security.gentoo.org/glsa/201703-07

Original Source

Url : http://security.gentoo.org/glsa/glsa-201703-07.xml

CWE : Common Weakness Enumeration

% Id Name
50 % CWE-787 Out-of-bounds Write (CWE/SANS Top 25)
50 % CWE-125 Out-of-bounds Read

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 5
Application 157
Application 6
Application 17
Os 1
Os 2
Os 2
Os 2
Os 3
Os 2
Os 128

Nessus® Vulnerability Scanner

Date Description
2018-09-07 Name : The remote Debian host is missing a security update.
File : debian_DLA-1497.nasl - Type : ACT_GATHER_INFO
2018-02-07 Name : The remote Debian host is missing a security update.
File : debian_DLA-1270.nasl - Type : ACT_GATHER_INFO
2017-11-27 Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2017-3084-1.nasl - Type : ACT_GATHER_INFO
2017-10-13 Name : The remote OracleVM host is missing one or more security updates.
File : oraclevm_OVMSA-2017-0153.nasl - Type : ACT_GATHER_INFO
2017-08-30 Name : The remote OracleVM host is missing one or more security updates.
File : oraclevm_OVMSA-2017-0142.nasl - Type : ACT_GATHER_INFO
2017-07-13 Name : The remote Virtuozzo host is missing a security update.
File : Virtuozzo_VZLSA-2017-0454.nasl - Type : ACT_GATHER_INFO
2017-07-13 Name : The remote Virtuozzo host is missing a security update.
File : Virtuozzo_VZLSA-2017-0396.nasl - Type : ACT_GATHER_INFO
2017-07-13 Name : The remote Virtuozzo host is missing a security update.
File : Virtuozzo_VZLSA-2017-0352.nasl - Type : ACT_GATHER_INFO
2017-05-17 Name : The remote openSUSE host is missing a security update.
File : openSUSE-2017-589.nasl - Type : ACT_GATHER_INFO
2017-05-12 Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2017-1241-1.nasl - Type : ACT_GATHER_INFO
2017-05-04 Name : The remote OracleVM host is missing one or more security updates.
File : oraclevm_OVMSA-2017-0096.nasl - Type : ACT_GATHER_INFO
2017-05-04 Name : The remote OracleVM host is missing one or more security updates.
File : oraclevm_OVMSA-2017-0095.nasl - Type : ACT_GATHER_INFO
2017-05-01 Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2017-1135-1.nasl - Type : ACT_GATHER_INFO
2017-05-01 Name : The remote EulerOS host is missing multiple security updates.
File : EulerOS_SA-2017-1037.nasl - Type : ACT_GATHER_INFO
2017-05-01 Name : The remote EulerOS host is missing multiple security updates.
File : EulerOS_SA-2017-1038.nasl - Type : ACT_GATHER_INFO
2017-04-21 Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-3261-1.nasl - Type : ACT_GATHER_INFO
2017-04-11 Name : The remote Gentoo host is missing one or more security-related patches.
File : gentoo_GLSA-201704-01.nasl - Type : ACT_GATHER_INFO
2017-03-30 Name : The remote OracleVM host is missing a security update.
File : oraclevm_OVMSA-2017-0055.nasl - Type : ACT_GATHER_INFO
2017-03-28 Name : The remote Gentoo host is missing one or more security-related patches.
File : gentoo_GLSA-201703-07.nasl - Type : ACT_GATHER_INFO
2017-03-22 Name : The remote Fedora host is missing a security update.
File : fedora_2017-62ac1230f7.nasl - Type : ACT_GATHER_INFO
2017-03-20 Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2017-0718-1.nasl - Type : ACT_GATHER_INFO
2017-03-20 Name : The remote Fedora host is missing a security update.
File : fedora_2017-31b976672b.nasl - Type : ACT_GATHER_INFO
2017-03-17 Name : The remote openSUSE host is missing a security update.
File : openSUSE-2017-349.nasl - Type : ACT_GATHER_INFO
2017-03-14 Name : The remote openSUSE host is missing a security update.
File : openSUSE-2017-329.nasl - Type : ACT_GATHER_INFO
2017-03-13 Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2017-0661-1.nasl - Type : ACT_GATHER_INFO
2017-03-10 Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2017-0647-1.nasl - Type : ACT_GATHER_INFO
2017-03-09 Name : The remote Fedora host is missing a security update.
File : fedora_2017-1607a3a78e.nasl - Type : ACT_GATHER_INFO
2017-03-09 Name : The remote CentOS host is missing one or more security updates.
File : centos_RHSA-2017-0454.nasl - Type : ACT_GATHER_INFO
2017-03-08 Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2017-0625-1.nasl - Type : ACT_GATHER_INFO
2017-03-08 Name : The remote Scientific Linux host is missing one or more security updates.
File : sl_20170307_kvm_on_SL5_x.nasl - Type : ACT_GATHER_INFO
2017-03-08 Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2017-0454.nasl - Type : ACT_GATHER_INFO
2017-03-08 Name : The remote Oracle Linux host is missing one or more security updates.
File : oraclelinux_ELSA-2017-0454.nasl - Type : ACT_GATHER_INFO
2017-03-06 Name : The remote CentOS host is missing one or more security updates.
File : centos_RHSA-2017-0396.nasl - Type : ACT_GATHER_INFO
2017-03-03 Name : The remote Scientific Linux host is missing one or more security updates.
File : sl_20170302_qemu_kvm_on_SL7_x.nasl - Type : ACT_GATHER_INFO
2017-03-03 Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2017-0396.nasl - Type : ACT_GATHER_INFO
2017-03-03 Name : The remote Oracle Linux host is missing one or more security updates.
File : oraclelinux_ELSA-2017-0396.nasl - Type : ACT_GATHER_INFO
2017-03-03 Name : The remote host is affected by multiple vulnerabilities.
File : citrix_xenserver_CTX220771.nasl - Type : ACT_GATHER_INFO
2017-03-02 Name : The remote Scientific Linux host is missing one or more security updates.
File : sl_20170301_qemu_kvm_on_SL6_x.nasl - Type : ACT_GATHER_INFO
2017-03-02 Name : The remote CentOS host is missing one or more security updates.
File : centos_RHSA-2017-0352.nasl - Type : ACT_GATHER_INFO
2017-03-02 Name : The remote Debian host is missing a security update.
File : debian_DLA-845.nasl - Type : ACT_GATHER_INFO
2017-03-02 Name : The remote Oracle Linux host is missing one or more security updates.
File : oraclelinux_ELSA-2017-0352.nasl - Type : ACT_GATHER_INFO
2017-03-02 Name : The remote OracleVM host is missing a security update.
File : oraclevm_OVMSA-2017-0047.nasl - Type : ACT_GATHER_INFO
2017-03-02 Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2017-0350.nasl - Type : ACT_GATHER_INFO
2017-03-02 Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2017-0351.nasl - Type : ACT_GATHER_INFO
2017-03-02 Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2017-0352.nasl - Type : ACT_GATHER_INFO
2017-03-01 Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2017-0582-1.nasl - Type : ACT_GATHER_INFO
2017-03-01 Name : The remote Fedora host is missing a security update.
File : fedora_2017-266ab882cd.nasl - Type : ACT_GATHER_INFO
2017-03-01 Name : The remote Debian host is missing a security update.
File : debian_DLA-842.nasl - Type : ACT_GATHER_INFO
2017-02-28 Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2017-0571-1.nasl - Type : ACT_GATHER_INFO
2017-02-28 Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2017-0570-1.nasl - Type : ACT_GATHER_INFO
2017-02-22 Name : The remote FreeBSD host is missing a security-related update.
File : freebsd_pkg_8cbd9c08f8b911e6ae1b002590263bf5.nasl - Type : ACT_GATHER_INFO

Alert History

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0
1
2
3
Date Informations
2018-09-06 21:22:02
  • Multiple Updates
2018-07-29 09:21:23
  • Multiple Updates
2017-03-29 13:24:22
  • Multiple Updates
2017-03-28 09:19:18
  • First insertion