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Scientific Linux Security Update : libvirt on SL6.x i386/x86_64 (20130919)
medium Nessus Plugin ID 70015
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Synopsis
The remote Scientific Linux host is missing one or more security updates.Description
libvirt invokes the PolicyKit pkcheck utility to handle authorization.A race condition was found in the way libvirt used this utility, allowing a local user to bypass intended PolicyKit authorizations or execute arbitrary commands with root privileges. (CVE-2013-4311)
Note: With this update, libvirt has been rebuilt to communicate with PolicyKit via a different API that is not vulnerable to the race condition. The polkit SLSA-2013:1270 advisory must also be installed to fix the CVE-2013-4311 issue.
An invalid free flaw was found in libvirtd's remoteDispatchDomainMemoryStats function. An attacker able to establish a read-only connection to libvirtd could use this flaw to crash libvirtd. (CVE-2013-4296)
This update also fixes the following bugs :
- Prior to this update, the libvirtd daemon leaked memory in the virCgroupMoveTask() function. A fix has been provided which prevents libvirtd from incorrect management of memory allocations.
- Previously, the libvirtd daemon was accessing one byte before the array in the virCgroupGetValueStr() function.
This bug has been fixed and libvirtd now stays within the array bounds.
- When migrating, libvirtd leaked the migration URI (Uniform Resource Identifier) on destination. A patch has been provided to fix this bug and the migration URI is now freed correctly.
- Updating a network interface using virDomainUpdateDeviceFlags API failed when a boot order was set for that interface. The update failed even if the boot order was set in the provided device XML. The virDomainUpdateDeviceFlags API has been fixed to correctly parse the boot order specification from the provided device XML and updating network interfaces with boot orders now works as expected.
After installing the updated packages, libvirtd will be restarted automatically.
Solution
Update the affected packages.See Also
Plugin Details
Severity: Medium
ID: 70015
File Name: sl_20130919_libvirt_on_SL6_x.nasl
Version: 1.7
Type: local
Agent: unix
Published: 9/20/2013
Updated: 1/14/2021
Supported Sensors: Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 6.3
CVSS v2
Risk Factor: Medium
Base Score: 4.6
Vector: CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P
Vulnerability Information
CPE: p-cpe:/a:fermilab:scientific_linux:libvirt, p-cpe:/a:fermilab:scientific_linux:libvirt-client, p-cpe:/a:fermilab:scientific_linux:libvirt-debuginfo, p-cpe:/a:fermilab:scientific_linux:libvirt-devel, p-cpe:/a:fermilab:scientific_linux:libvirt-lock-sanlock, p-cpe:/a:fermilab:scientific_linux:libvirt-python, x-cpe:/o:fermilab:scientific_linux
Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu
Patch Publication Date: 9/19/2013
Vulnerability Publication Date: 9/30/2013
Reference Information
CVE: CVE-2013-4296, CVE-2013-4311