Virtual Desktop Server Manager (VDSM) in Red Hat Enterprise Virtualization (RHEV) 2.2 does not properly accept TCP connections for SSL sessions, which allows remote attackers to cause a denial of service (daemon outage) via crafted SSL traffic.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Virtual Desktop Server Manager (VDSM) in Red Hat Enterprise Virtualization (RHEV) 2.2 does not properly     accept TCP connections for SSL sessions, which allows remote attackers to cause a denial of service     (daemon outage) via crafted SSL traffic. (CVE-2010-2811)

Note that Nessus relies on the presence of the package as reported by the vendor.

The remote Redhat Enterprise Linux 5 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2010:0628 advisory.

    VDSM is a management module that serves as a Red Hat Enterprise     Virtualization Manager agent on Red Hat Enterprise Virtualization     Hypervisor or Red Hat Enterprise Linux hosts.

    Note: This update has been tested and is supported on Red Hat Enterprise     Linux 5.5 (with all appropriate post-GA 5.5-specific updates).

    A flaw was found in the way VDSM accepted SSL connections. An attacker     could trigger this flaw by creating a crafted SSL connection to VDSM,     preventing VDSM from accepting SSL connections from other users.
    (CVE-2010-2811)

    These updated vdsm22 packages also fix the following bugs:

    * suspend-to-file hibernation failed for huge guests due to the migration     and hibernation constant values being too short for huge guests. This     update makes the timeouts proportional to guest RAM size, thus allowing     suspension of huge guests in all cases except where storage is unbearably     slow. (BZ#601275)

    * under certain circumstances, restarting a VDSM that was being used as a     Storage Pool Manager killed all system processes on the host. With this     update, stopping VDSM is ensured to kill only the processes that it     started, and the VDSM SIGTERM handler is not run concurrently. With these     changes, all processes on the host are no longer killed when VDSM is     restarted. (BZ#614849)

    * when VDSM was requested to start in paused mode, it incorrectly     reported virtual guest state as WaitForLaunch instead of Paused, which     led to the virtual guest being inaccessible from Red Hat Enterprise     Virtualization Manager. With this update, VDSM reports such virtual guests     as Paused, and users are able to connect to the virtual guest display.
    (BZ#616464)

    Red Hat Enterprise Virtualization Manager 2.2 users with Red Hat Enterprise     Linux hosts should install these updated packages, which resolve these     issues. Alternatively, Red Hat Enterprise Virtualization Manager can     install the new package automatically.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Updated rhev-hypervisor packages that fix multiple security issues and two bugs are now available.

The Red Hat Security Response Team has rated this update as having important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

The rhev-hypervisor package provides a Red Hat Enterprise Virtualization Hypervisor ISO disk image. The Red Hat Enterprise Virtualization Hypervisor is a dedicated Kernel-based Virtual Machine (KVM) hypervisor. It includes everything necessary to run and manage virtual machines: A subset of the Red Hat Enterprise Linux operating environment and the Red Hat Enterprise Virtualization Agent.

Note: Red Hat Enterprise Virtualization Hypervisor is only available for the Intel 64 and AMD64 architectures with virtualization extensions.

It was found that the libspice component of QEMU-KVM on the host did not validate all pointers provided from a guest system's QXL graphics card driver. A privileged guest user could use this flaw to cause the host to dereference an invalid pointer, causing the guest to crash (denial of service) or, possibly, resulting in the privileged guest user escalating their privileges on the host. (CVE-2010-0428)

It was found that the libspice component of QEMU-KVM on the host could be forced to perform certain memory management operations on memory addresses controlled by a guest. A privileged guest user could use this flaw to crash the guest (denial of service) or, possibly, escalate their privileges on the host. (CVE-2010-0429)

It was found that QEMU-KVM on the host did not validate all pointers provided from a guest system's QXL graphics card driver. A privileged guest user could use this flaw to cause the host to dereference an invalid pointer, causing the guest to crash (denial of service) or, possibly, resulting in the privileged guest user escalating their privileges on the host. (CVE-2010-0431)

A flaw was found in QEMU-KVM, allowing the guest some control over the index used to access the callback array during sub-page MMIO initialization. A privileged guest user could use this flaw to crash the guest (denial of service) or, possibly, escalate their privileges on the host. (CVE-2010-2784)

A NULL pointer dereference flaw was found when Red Hat Enterprise Virtualization Hypervisor was run on a system that has a processor with the Intel VT-x extension enabled. A privileged guest user could use this flaw to trick the host into emulating a certain instruction, which could crash the host (denial of service). (CVE-2010-0435)

A flaw was found in the way VDSM accepted SSL connections. An attacker could trigger this flaw by creating a crafted SSL connection to VDSM, preventing VDSM from accepting SSL connections from other users.
(CVE-2010-2811)

These updated packages provide updated components that include fixes for security issues; however, these issues have no security impact for Red Hat Enterprise Virtualization Hypervisor. These fixes are for avahi issues CVE-2009-0758 and CVE-2010-2244; freetype issues CVE-2010-1797, CVE-2010-2498, CVE-2010-2499, CVE-2010-2500, CVE-2010-2519, CVE-2010-2527, and CVE-2010-2541; kernel issues CVE-2010-1084, CVE-2010-2066, CVE-2010-2070, CVE-2010-2226, CVE-2010-2248, CVE-2010-2521, and CVE-2010-2524; and openldap issues CVE-2010-0211 and CVE-2010-0212.

These updated rhev-hypervisor packages also fix two bugs.
Documentation for these bug fixes will be available shortly from http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Virtualization_fo r_Servers /2.2/html/Technical_Notes/index.html

As Red Hat Enterprise Virtualization Hypervisor is based on KVM, the bug fixes from the KVM update RHSA-2010:0627 have been included in this update. Also included are the bug fixes from the VDSM update RHSA-2010:0628.

KVM: https://rhn.redhat.com/errata/RHSA-2010-0627.html VDSM:
https://rhn.redhat.com/errata/RHSA-2010-0628.html

Users of Red Hat Enterprise Virtualization Hypervisor are advised to upgrade to these updated rhev-hypervisor packages, which resolve these issues.

ID	Name	Product	Family	Severity
217223	Linux Distros Unpatched Vulnerability : CVE-2010-2811	Nessus	Misc.	high
79277	RHEL 5 : vdsm22 (RHSA-2010:0628)	Nessus	Red Hat Local Security Checks	high
79276	RHEL 5 : rhev-hypervisor (RHSA-2010:0622)	Nessus	Red Hat Local Security Checks	medium

Detections

Analytics

CVE-2010-2811

high

Tenable Plugins

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medium