Executive Summary
Summary | |
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Title | qemu-kvm security and bug fix update |
Informations | |||
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Name | RHSA-2013:0896 | First vendor Publication | 2013-06-03 |
Vendor | RedHat | Last vendor Modification | 2013-06-03 |
Severity (Vendor) | Moderate | Revision | 01 |
Security-Database Scoring CVSS v3
Cvss vector : N/A | |||
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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:L/AC:M/Au:N/C:C/I:C/A:C) | |||
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Cvss Base Score | 6.9 | Attack Range | Local |
Cvss Impact Score | 10 | Attack Complexity | Medium |
Cvss Expoit Score | 3.4 | Authentication | None Required |
Calculate full CVSS 2.0 Vectors scores |
Detail
Problem Description: Updated qemu-kvm packages that fix one security issue and two bugs are now available for Red Hat Enterprise Linux 6. The Red Hat Security Response Team has rated this update as having moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section. 2. Relevant releases/architectures: Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64 Red Hat Enterprise Linux Desktop Optional (v. 6) - x86_64 Red Hat Enterprise Linux HPC Node (v. 6) - x86_64 Red Hat Enterprise Linux HPC Node Optional (v. 6) - x86_64 Red Hat Enterprise Linux Server (v. 6) - i386, x86_64 Red Hat Enterprise Linux Server Optional (v. 6) - x86_64 Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64 Red Hat Enterprise Linux Workstation Optional (v. 6) - x86_64 3. Description: KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on AMD64 and Intel 64 systems. qemu-kvm is the user-space component for running virtual machines using KVM. It was found that QEMU Guest Agent (the "qemu-ga" service) created certain files with world-writable permissions when run in daemon mode (the default mode). An unprivileged guest user could use this flaw to consume all free space on the partition containing the qemu-ga log file, or modify the contents of the log. When a UNIX domain socket transport was explicitly configured to be used (not the default), an unprivileged guest user could potentially use this flaw to escalate their privileges in the guest. This update requires manual action. Refer below for details. (CVE-2013-2007) This update does not change the permissions of the existing log file or the UNIX domain socket. For these to be changed, stop the qemu-ga service, and then manually remove all "group" and "other" permissions on the affected files, or remove the files. Note that after installing this update, files created by the guest-file-open QEMU Monitor Protocol (QMP) command will still continue to be created with world-writable permissions for backwards compatibility. This issue was discovered by Laszlo Ersek of Red Hat. This update also fixes the following bugs: * Previously, due to integer overflow in code calculations, the qemu-kvm utility was reporting incorrect memory size on QMP events when using the virtio balloon driver with more than 4 GB of memory. This update fixes the overflow in the code and qemu-kvm works as expected in the described scenario. (BZ#958750) * When the set_link flag is set to "off" to change the status of a network card, the status is changed to "down" on the respective guest. Previously, with certain network cards, when such a guest was restarted, the status of the network card was unexpectedly reset to "up", even though the network was unavailable. A patch has been provided to address this bug and the link status change is now preserved across restarts for all network cards. (BZ#927591) All users of qemu-kvm should upgrade to these updated packages, which contain backported patches to correct these issues. After installing this update, shut down all running virtual machines. Once all virtual machines have shut down, start them again for this update to take effect. 4. Solution: Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/knowledge/articles/11258 5. Bugs fixed (http://bugzilla.redhat.com/): 927591 - use set_link to change rtl8139 and e1000 network card's status but fail to make effectively after reboot guest 956082 - CVE-2013-2007 qemu: guest agent creates files with insecure permissions in deamon mode |
Original Source
Url : https://rhn.redhat.com/errata/RHSA-2013-0896.html |
CWE : Common Weakness Enumeration
% | Id | Name |
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100 % | CWE-264 | Permissions, Privileges, and Access Controls |
OVAL Definitions
Definition Id: oval:org.mitre.oval:def:21034 | |||
Oval ID: | oval:org.mitre.oval:def:21034 | ||
Title: | RHSA-2013:0896: qemu-kvm security and bug fix update (Moderate) | ||
Description: | The qemu guest agent in Qemu 1.4.1 and earlier, as used by Xen, when started in daemon mode, uses weak permissions for certain files, which allows local users to read and write to these files. | ||
Family: | unix | Class: | patch |
Reference(s): | RHSA-2013:0896-01 CESA-2013:0896 CVE-2013-2007 | Version: | 4 |
Platform(s): | Red Hat Enterprise Linux 6 CentOS Linux 6 | Product(s): | qemu-kvm |
Definition Synopsis: | |||
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Definition Id: oval:org.mitre.oval:def:23878 | |||
Oval ID: | oval:org.mitre.oval:def:23878 | ||
Title: | ELSA-2013:0896: qemu-kvm security and bug fix update (Moderate) | ||
Description: | The qemu guest agent in Qemu 1.4.1 and earlier, as used by Xen, when started in daemon mode, uses weak permissions for certain files, which allows local users to read and write to these files. | ||
Family: | unix | Class: | patch |
Reference(s): | ELSA-2013:0896-01 CVE-2013-2007 | Version: | 6 |
Platform(s): | Oracle Linux 6 | Product(s): | qemu-kvm |
Definition Synopsis: | |||
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Definition Id: oval:org.mitre.oval:def:25601 | |||
Oval ID: | oval:org.mitre.oval:def:25601 | ||
Title: | SUSE-SU-2013:1214-1 -- Security update for KVM | ||
Description: | This update fixes a file permission issue with qga (the QEMU Guest Agent) from the qemu/kvm package and includes several bug-fixes. (bnc#818182) (CVE-2013-2007) (bnc#786813) (bnc#725008) (bnc#712137) (bnc#824340) Security Issues: * CVE-2013-2007 <http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-2007 > | ||
Family: | unix | Class: | patch |
Reference(s): | SUSE-SU-2013:1214-1 CVE-2013-2007 | Version: | 3 |
Platform(s): | SUSE Linux Enterprise Server 11 SUSE Linux Enterprise Desktop 11 | Product(s): | KVM |
Definition Synopsis: | |||
Definition Id: oval:org.mitre.oval:def:27389 | |||
Oval ID: | oval:org.mitre.oval:def:27389 | ||
Title: | DEPRECATED: ELSA-2013-0896 -- qemu-kvm security and bug fix update (moderate) | ||
Description: | [0.12.1.2-2.355.el6_4.5] - kvm-e1000-fix-link-down-handling-with-auto-negotiation.patch [bz#907716] - kvm-e1000-unbreak-the-guest-network-when-migration-to-RH.patch [bz#907716] - kvm-reimplement-error_setg-and-error_setg_errno-for-RHEL.patch [bz#957056] - kvm-qga-set-umask-0077-when-daemonizing-CVE-2013-2007.patch [bz#957056] - kvm-qga-distinguish-binary-modes-in-guest_file_open_mode.patch [bz#957056] - kvm-qga-unlink-just-created-guest-file-if-fchmod-or-fdop.patch [bz#957056] - Resolves: bz#907716 (use set_link to change rtl8139 and e1000 network card's status but fail to make effectively after reboot guest) - Resolves: bz#957056 (CVE-2013-2007 qemu: guest agent creates files with insecure permissions in deamon mode [rhel-6.4.z]) [0.12.1.2-2.355.el6_4.4] - kvm-virtio-balloon-fix-integer-overflow-in-BALLOON_CHANG.patch [bz#958750] - Resolves: bz#958750 (QMP event shows incorrect balloon value when balloon size is grater than or equal to 4G) | ||
Family: | unix | Class: | patch |
Reference(s): | ELSA-2013-0896 CVE-2013-2007 | Version: | 4 |
Platform(s): | Oracle Linux 6 | Product(s): | qemu-kvm |
Definition Synopsis: | |||
CPE : Common Platform Enumeration
Type | Description | Count |
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Application | 1 |
Nessus® Vulnerability Scanner
Date | Description |
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2014-11-08 | Name : The remote Red Hat host is missing one or more security updates. File : redhat-RHSA-2013-0791.nasl - Type : ACT_GATHER_INFO |
2014-06-13 | Name : The remote openSUSE host is missing a security update. File : openSUSE-2013-588.nasl - Type : ACT_GATHER_INFO |
2014-06-13 | Name : The remote openSUSE host is missing a security update. File : openSUSE-2013-677.nasl - Type : ACT_GATHER_INFO |
2013-12-20 | Name : The remote SuSE 11 host is missing one or more security updates. File : suse_11_xen-201311-131127.nasl - Type : ACT_GATHER_INFO |
2013-07-19 | Name : The remote SuSE 11 host is missing a security update. File : suse_11_kvm-130624.nasl - Type : ACT_GATHER_INFO |
2013-07-12 | Name : The remote Fedora host is missing a security update. File : fedora_2013-11407.nasl - Type : ACT_GATHER_INFO |
2013-07-12 | Name : The remote Oracle Linux host is missing one or more security updates. File : oraclelinux_ELSA-2013-0896.nasl - Type : ACT_GATHER_INFO |
2013-06-05 | Name : The remote CentOS host is missing one or more security updates. File : centos_RHSA-2013-0896.nasl - Type : ACT_GATHER_INFO |
2013-06-04 | Name : The remote Scientific Linux host is missing one or more security updates. File : sl_20130603_qemu_kvm_on_SL6_x.nasl - Type : ACT_GATHER_INFO |
2013-06-03 | Name : The remote Red Hat host is missing one or more security updates. File : redhat-RHSA-2013-0896.nasl - Type : ACT_GATHER_INFO |
Alert History
Date | Informations |
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2014-02-17 11:57:16 |
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2013-06-03 21:21:47 |
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