The virTypedParameterArrayClear function in libvirt 0.9.13 does not properly handle virDomain* API calls with typed parameters, which might allow remote authenticated users to cause a denial of service (libvirtd crash) via an RPC command with nparams set to zero, which triggers an out-of-bounds read or a free of an invalid pointer.

libvirt was updated to fix a remote denial of service which could lead to crashes in virtd.

The remote Oracle Linux 6 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2012-1202 advisory.

    [libvirt-0.9.10-21.0.1.el6_3.4]
    - Replace docs/et.png in tarball with blank image

    [libvirt-0.9.10-21.el6_3.4]
    - daemon: Fix crash in virTypedParameterArrayClear (rhbz#844735)
    - remote: Fix locking in stream APIs (rhbz#847946)
    - Using virOnce for global initialization is desirable (rhbz#847959)
    - json: Fix interface locale dependency (rhbz#847959)

Tenable has extracted the preceding description block directly from the Oracle 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.

- Rebased to version 0.9.11.5

    - CVE-2012-3445 crash in virTypedParameterArrayClear (bz       844734)

    - Fix libvirt-guests (bz 843836)

    - Fix occasional loss of domain events in boxes (bz       819617)

    - Drop bogus daemon dep additions (bz 849159)

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Updated libvirt 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.

The libvirt library is a C API for managing and interacting with the virtualization capabilities of Linux and other operating systems. In addition, libvirt provides tools for remote management of virtualized systems.

A flaw was found in libvirtd's RPC call handling. An attacker able to establish a read-only connection to libvirtd could trigger this flaw with a specially crafted RPC command that has the number of parameters set to 0, causing libvirtd to access invalid memory and crash.
(CVE-2012-3445)

This update also fixes the following bugs :

* Previously, repeatedly migrating a guest between two machines while using the tunnelled migration could cause the libvirt daemon to lock up unexpectedly. The bug in the code for locking remote drivers has been fixed and repeated tunnelled migrations of domains now work as expected. (BZ#847946)

* Previously, when certain system locales were used by the system, libvirt could issue incorrect commands to the hypervisor. This bug has been fixed and the libvirt library and daemon are no longer affected by the choice of the user locale. (BZ#847959)

All users of libvirt are advised to upgrade to these updated packages, which contain backported patches to correct these issues. After installing the updated packages, libvirtd will be restarted automatically.

The libvirt library is a C API for managing and interacting with the virtualization capabilities of Linux and other operating systems. In addition, libvirt provides tools for remote management of virtualized systems.

A flaw was found in libvirtd's RPC call handling. An attacker able to establish a read-only connection to libvirtd could trigger this flaw with a specially crafted RPC command that has the number of parameters set to 0, causing libvirtd to access invalid memory and crash.
(CVE-2012-3445)

This update also fixes the following bugs :

  - Previously, repeatedly migrating a guest between two     machines while using the tunnelled migration could cause     the libvirt daemon to lock up unexpectedly. The bug in     the code for locking remote drivers has been fixed and     repeated tunnelled migrations of domains now work as     expected.

  - Previously, when certain system locales were used by the     system, libvirt could issue incorrect commands to the     hypervisor. This bug has been fixed and the libvirt     library and daemon are no longer affected by the choice     of the user locale.

All users of libvirt are advised to upgrade to these updated packages, which contain backported patches to correct these issues. After installing the updated packages, libvirtd will be restarted automatically.

The remote Redhat Enterprise Linux 6 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2012:1202 advisory.

  - libvirt: crash in virTypedParameterArrayClear (CVE-2012-3445)

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

- Rebased to version 0.9.6.2

    - Fix crash in virTypedParameterArrayClear (bz 844745,       bz 844734)

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Severity
74713	openSUSE Security Update : libvirt (openSUSE-SU-2012:0991-1)	Nessus	SuSE Local Security Checks	low
68603	Oracle Linux 6 : libvirt (ELSA-2012-1202)	Nessus	Oracle Linux Local Security Checks	medium
61779	Fedora 17 : libvirt-0.9.11.5-3.fc17 (2012-12523)	Nessus	Fedora Local Security Checks	low
61661	CentOS 6 : libvirt (CESA-2012:1202)	Nessus	CentOS Local Security Checks	low
61656	Scientific Linux Security Update : libvirt on SL6.x i386/x86_64 (20120823)	Nessus	Scientific Linux Local Security Checks	low
61654	RHEL 6 : libvirt (RHSA-2012:1202)	Nessus	Red Hat Local Security Checks	medium
61631	Fedora 16 : libvirt-0.9.6.2-1.fc16 (2012-11843)	Nessus	Fedora Local Security Checks	low

Detections

Analytics

CVE-2012-3445

medium

Tenable Plugins

low

medium

low

low

low

medium

low