Double free vulnerability in the xfrm6_tunnel_rcv function in net/ipv6/xfrm6_tunnel.c in the Linux kernel before 2.6.22, when the xfrm6_tunnel module is enabled, allows remote attackers to cause a denial of service (panic) via crafted IPv6 packets.

The remote VMware ESX / ESXi host is missing a security-related patch.
It is, therefore, affected by multiple vulnerabilities, including remote code execution vulnerabilities, in several third-party libraries :

  - Apache Struts
  - glibc
  - GnuTLS
  - JRE
  - kernel
  - libxml2
  - OpenSSL
  - Perl
  - popt and rpm

The remote OracleVM system is missing necessary patches to address critical security updates : please see Oracle VM Security Advisory OVMSA-2013-0039 for details.

An updated rhev-hypervisor5 package that fixes three security issues and one bug is 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-hypervisor5 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.

A flaw was found in the way libtasn1 decoded DER data. An attacker could create a carefully-crafted X.509 certificate that, when parsed by an application that uses GnuTLS, could cause the application to crash. (CVE-2012-1569)

A flaw was found in the way GnuTLS decrypted malformed TLS records.
This could cause a TLS/SSL client or server to crash when processing a specially crafted TLS record from a remote TLS/SSL connection peer.
(CVE-2012-1573)

An integer overflow flaw was found in the implementation of the printf functions family. This could allow an attacker to bypass FORTIFY_SOURCE protections and execute arbitrary code using a format string flaw in an application, even though these protections are expected to limit the impact of such flaws to an application abort.
(CVE-2012-0864)

Red Hat would like to thank Matthew Hall of Mu Dynamics for reporting CVE-2012-1569 and CVE-2012-1573.

This updated package provides updated components that include fixes for various security issues. These issues have no security impact on Red Hat Enterprise Virtualization Hypervisor itself, however. The security fixes included in this update address the following CVE numbers :

CVE-2011-4128 (gnutls issue)

CVE-2012-1583 (kernel issue)

CVE-2011-3045 (libpng issue)

CVE-2012-0884 and CVE-2012-1165 (openssl issues)

Further information on the changes made to the package is available on the relevant errata :

https://rhn.redhat.com/errata/RHBA-2012-0398.html

Users of Red Hat Enterprise Virtualization Hypervisor are advised to upgrade to this updated package, which fixes these issues.

From Red Hat Security Advisory 2012:0480 :

Updated kernel packages that fix one security issue, various bugs, and add one enhancement are now available for Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having important 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 kernel packages contain the Linux kernel, the core of any Linux operating system.

This update fixes the following security issue :

* A flaw in the xfrm6_tunnel_rcv() function in the Linux kernel's IPv6 implementation could lead to a use-after-free or double free flaw in tunnel6_rcv(). A remote attacker could use this flaw to send specially crafted packets to a target system that is using IPv6 and also has the xfrm6_tunnel kernel module loaded, causing it to crash.
(CVE-2012-1583, Important)

If you do not run applications that use xfrm6_tunnel, you can prevent the xfrm6_tunnel module from being loaded by creating (as the root user) a '/etc/modprobe.d/xfrm6_tunnel.conf' file, and adding the following line to it :

blacklist xfrm6_tunnel

This way, the xfrm6_tunnel module cannot be loaded accidentally. A reboot is not necessary for this change to take effect.

This update also fixes various bugs and adds an enhancement.
Documentation for these changes will be available shortly from the Technical Notes document linked to in the References section.

Users should upgrade to these updated packages, which contain backported patches to correct this issue, and fix the bugs and add the enhancement noted in the Technical Notes. The system must be rebooted for this update to take effect.

Updated kernel packages that fix two security issues and multiple bugs are now available for Red Hat Enterprise Linux 5.6 Extended Update Support.

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.

[Updated 19th June 2012] The original erratum text provided an incorrect description for BZ#807929. The text has been updated to provide the correct description. No changes have been made to the packages.

The kernel packages contain the Linux kernel, the core of any Linux operating system.

This update fixes the following security issues :

* It was found that the Xen hypervisor implementation as shipped with Red Hat Enterprise Linux 5 did not properly restrict the syscall return addresses in the sysret return path to canonical addresses. An unprivileged user in a 64-bit para-virtualized guest, that is running on a 64-bit host that has an Intel CPU, could use this flaw to crash the host or, potentially, escalate their privileges, allowing them to execute arbitrary code at the hypervisor level. (CVE-2012-0217, Important)

Note: For Red Hat Enterprise Linux guests, only privileged guest users can exploit CVE-2012-0217.

* A flaw in the xfrm6_tunnel_rcv() function in the Linux kernel's IPv6 implementation could lead to a use-after-free or double free flaw in tunnel6_rcv(). A remote attacker could use this flaw to send specially crafted packets to a target system that is using IPv6 and also has the xfrm6_tunnel kernel module loaded, causing it to crash.
(CVE-2012-1583, Important)

If you do not run applications that use xfrm6_tunnel, you can prevent the xfrm6_tunnel module from being loaded by creating (as the root user) a '/etc/modprobe.d/xfrm6_tunnel.conf' file, and adding the following line to it :

blacklist xfrm6_tunnel

This way, the xfrm6_tunnel module cannot be loaded accidentally. A reboot is not necessary for this change to take effect.

Red Hat would like to thank the Xen project for reporting CVE-2012-0217. Upstream acknowledges Rafal Wojtczuk as the original reporter of CVE-2012-0217.

This update also fixes the following bugs :

* A bug in the vsyscall interface caused 32-bit multi-threaded programs, which received the SIGCANCEL signal right after they returned from a system call, to terminate unexpectedly with a segmentation fault when run on the AMD64 or Intel 64 architecture. A patch has been provided to address this issue and the crashes no longer occur in the described scenario. (BZ#807929)

* Incorrect duplicate MAC addresses were being used on a rack network daughter card that contained a quad-port Intel I350 Gigabit Ethernet Controller. With this update, the underlying source code has been modified to address this issue, and correct MAC addresses are now used under all circumstances. (BZ#813195)

* When the Fibre Channel (FC) layer sets a device to 'running', the layer also scans for other new devices. Previously, there was a race condition between these two operations. Consequently, for certain targets, thousands of invalid devices were created by the SCSI layer and the udev service. This update ensures that the FC layer always sets a device to 'online' before scanning for others, thus fixing this bug.

Additionally, when attempting to transition priority groups on a busy FC device, the multipath layer retried immediately. If this was the only available path, a large number of retry operations were performed in a short period of time. Consequently, the logging of retry messages slowed down the system. This bug has been fixed by ensuring that the DM Multipath feature delays retry operations in the described scenario. (BZ#816683)

* Due to incorrect use of the list_for_each_entry_safe() macro, the enumeration of remote procedure calls (RPCs) priority wait queue tasks stored in the tk_wait.links list failed. As a consequence, the rpc_wake_up() and rpc_wake_up_status() functions failed to wake up all tasks. This caused the system to become unresponsive and could significantly decrease system performance. Now, the list_for_each_entry_safe() macro is no longer used in rpc_wake_up(), ensuring reasonable system performance. (BZ#817570)

Users should upgrade to these updated packages, which contain backported patches to correct these issues. The system must be rebooted for this update to take effect.

a. vCenter and ESX update to JRE 1.6.0 Update 31

   The Oracle (Sun) JRE is updated to version 1.6.0_31, which    addresses multiple security issues. Oracle has documented the    CVE identifiers that are addressed by this update in the Oracle    Java SE Critical Patch Update Advisory of February 2012.

b. vCenter Update Manager update to JRE 1.5.0 Update 36

   The Oracle (Sun) JRE is updated to 1.5.0_36 to address multiple    security issues.  Oracle has documented the CVE identifiers that    are addressed in JRE 1.5.0_36 in the Oracle Java SE Critical    Patch Update Advisory for June 2012.

c. Update to ESX/ESXi userworld OpenSSL library

   The ESX/ESXi userworld OpenSSL library is updated from version    0.9.8p to version 0.9.8t to resolve multiple security issues.

   The Common Vulnerabilities and Exposures project (cve.mitre.org)    has assigned the names CVE-2010-4180, CVE-2010-4252,    CVE-2011-0014, CVE-2011-4108, CVE-2011-4109, CVE-2011-4576,    CVE-2011-4577, CVE-2011-4619, and CVE-2012-0050 to these issues.

d. Update to ESX service console OpenSSL RPM

   The service console OpenSSL RPM is updated to version    0.9.8e-22.el5_8.3 to resolve a security issue.

   The Common Vulnerabilities and Exposures project (cve.mitre.org)    has assigned the name CVE-2012-2110 to this issue.

e. Update to ESX service console kernel

   The ESX service console kernel is updated to resolve multiple    security issues.

   The Common Vulnerabilities and Exposures project (cve.mitre.org)    has assigned the names CVE-2011-1833, CVE-2011-2484,    CVE-2011-2496, CVE-2011-3188, CVE-2011-3209, CVE-2011-3363,    CVE-2011-4110, CVE-2011-1020, CVE-2011-4132, CVE-2011-4324,    CVE-2011-4325, CVE-2012-0207, CVE-2011-2699, and CVE-2012-1583    to these issues.

f. Update to ESX service console Perl RPM

   The ESX service console Perl RPM is updated to    perl-5.8.8.32.1.8999.vmw to resolve multiple security issues.

   The Common Vulnerabilities and Exposures project (cve.mitre.org)    has assigned the names CVE-2010-2761, CVE-2010-4410, and    CVE-2011-3597 to these issues.

g. Update to ESX service console libxml2 RPMs

   The ESX service console libmxl2 RPMs are updated to    libxml2-2.6.26-2.1.15.el5_8.2 and    libxml2-python-2.6.26-2.1.15.el5_8.2 to resolve a security    issue.

   The Common Vulnerabilities and Exposures project (cve.mitre.org)    has assigned the name CVE-2012-0841 to this issue.

h. Update to ESX service console glibc RPM

   The ESX service console glibc RPM is updated to version    glibc-2.5-81.el5_8.1 to resolve multiple security issues.

   The Common Vulnerabilities and Exposures project (cve.mitre.org)   has assigned the names CVE-2009-5029, CVE-2009-5064,    CVE-2010-0830, CVE-2011-1089, CVE-2011-4609, and CVE-2012-0864    to these issue.

i. Update to ESX service console GnuTLS RPM

   The ESX service console GnuTLS RPM is updated to version    1.4.1-7.el5_8.2 to resolve multiple security issues.

   The Common Vulnerabilities and Exposures project (cve.mitre.org)    has assigned the names CVE-2011-4128, CVE-2012-1569, and    CVE-2012-1573 to these issues.

j. Update to ESX service console popt, rpm, rpm-libs,    and rpm-python RPMS

   The ESX service console popt, rpm, rpm-libs, and rpm-python RPMS    are updated to the following versions to resolve multiple    security issues :
      - popt-1.10.2.3-28.el5_8
      - rpm-4.4.2.3-28.el5_8
      - rpm-libs-4.4.2.3-28.el5_8
      - rpm-python-4.4.2.3-28.el5_8

   The Common Vulnerabilities and Exposures project (cve.mitre.org)    has assigned the name CVE-2012-0060, CVE-2012-0061, and    CVE-2012-0815 to these issues.

k. Vulnerability in third-party Apache Struts component

   The version of Apache Struts in vCenter Operations has been    updated to 2.3.4 which addresses an arbitrary file overwrite    vulnerability. This vulnerability allows an attacker to create    a denial of service by overwriting arbitrary files without    authentication. The attacker would need to be on the same network    as the system where vCOps is installed.

   The Common Vulnerabilities and Exposures project (cve.mitre.org) has    assigned the name CVE-2012-0393 to this issue.

   Note: Apache struts 2.3.4 addresses the following issues as well :
   CVE-2011-5057, CVE-2012-0391, CVE-2012-0392, CVE-2012-0394. It    was found that these do not affect vCOps.

   VMware would like to thank Alexander Minozhenko from ERPScan for    reporting this issue to us.

The kernel packages contain the Linux kernel, the core of any Linux operating system.

This update fixes the following security issue :

  - A flaw in the xfrm6_tunnel_rcv() function in the Linux     kernel's IPv6 implementation could lead to a     use-after-free or double free flaw in tunnel6_rcv(). A     remote attacker could use this flaw to send specially     crafted packets to a target system that is using IPv6     and also has the xfrm6_tunnel kernel module loaded,     causing it to crash. (CVE-2012-1583, Important)

If you do not run applications that use xfrm6_tunnel, you can prevent the xfrm6_tunnel module from being loaded by creating (as the root user) a '/etc/modprobe.d/xfrm6_tunnel.conf' file, and adding the following line to it :

blacklist xfrm6_tunnel

This way, the xfrm6_tunnel module cannot be loaded accidentally. A reboot is not necessary for this change to take effect.

This update also fixes various bugs and adds an enhancement. The system must be rebooted for this update to take effect.

The corresponding kernel-module-<module>-<kernel-version> modules have also been updated to match the kernel version.

Updated kernel packages that fix one security issue, various bugs, and add one enhancement are now available for Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having important 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 kernel packages contain the Linux kernel, the core of any Linux operating system.

This update fixes the following security issue :

* A flaw in the xfrm6_tunnel_rcv() function in the Linux kernel's IPv6 implementation could lead to a use-after-free or double free flaw in tunnel6_rcv(). A remote attacker could use this flaw to send specially crafted packets to a target system that is using IPv6 and also has the xfrm6_tunnel kernel module loaded, causing it to crash.
(CVE-2012-1583, Important)

If you do not run applications that use xfrm6_tunnel, you can prevent the xfrm6_tunnel module from being loaded by creating (as the root user) a '/etc/modprobe.d/xfrm6_tunnel.conf' file, and adding the following line to it :

blacklist xfrm6_tunnel

This way, the xfrm6_tunnel module cannot be loaded accidentally. A reboot is not necessary for this change to take effect.

This update also fixes various bugs and adds an enhancement.
Documentation for these changes will be available shortly from the Technical Notes document linked to in the References section.

Users should upgrade to these updated packages, which contain backported patches to correct this issue, and fix the bugs and add the enhancement noted in the Technical Notes. The system must be rebooted for this update to take effect.

The remote CentOS system is missing a security update which has been documented in Red Hat advisory RHSA-2012-0480.

ID	Name	Product	Family	Severity
89038	VMware ESX / ESXi Third-Party Libraries Multiple Vulnerabilities (VMSA-2012-0013) (remote check)	Nessus	Misc.	high
79507	OracleVM 2.2 : kernel (OVMSA-2013-0039)	Nessus	OracleVM Local Security Checks	high
79286	RHEL 5 : rhev-hypervisor5 (RHSA-2012:0488)	Nessus	Red Hat Local Security Checks	medium
68514	Oracle Linux 5 : kernel (ELSA-2012-0480)	Nessus	Oracle Linux Local Security Checks	medium
68513	Oracle Linux 5 : kernel (ELSA-2012-0480-1)	Nessus	Oracle Linux Local Security Checks	medium
64039	RHEL 5 : kernel (RHSA-2012:0720)	Nessus	Red Hat Local Security Checks	high
61747	VMSA-2012-0013 : VMware vSphere and vCOps updates to third-party libraries	Nessus	VMware ESX Local Security Checks	critical
61301	Scientific Linux Security Update : kernel on SL5.x i386/x86_64 (20120417)	Nessus	Scientific Linux Local Security Checks	medium
58778	CentOS 5 : kernel (CESA-2012:0480)	Nessus	CentOS Local Security Checks	medium
58772	RHEL 5 : kernel (RHSA-2012:0480)	Nessus	Red Hat Local Security Checks	medium
801514	CentOS RHSA-2012-0480 Security Check	Log Correlation Engine	Generic	high

Detections

Analytics

CVE-2012-1583

high

Tenable Plugins

high

high

medium

medium

medium

high

critical

medium

medium

medium

high