Red Hat Security Advisory: rhev-hypervisor6 security and bug fix update Security Advisory secalert@redhat.com Red Hat Security Response Team RHSA-2012:0531 Final 1 1 2012-04-30T17:02:00Z Current version 2012-04-30T17:02:00Z 2012-04-30T17:02:00Z Red Hat rhsa-to-cvrf 1.0.1478 2012-05-01T14:46:19Z An updated rhev-hypervisor6 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-hypervisor6 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 carefully-crafted DER encoded input (such as an X.509 certificate) that, when parsed by an application that uses libtasn1 (such as applications using 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-2012-0879, CVE-2012-1090, and CVE-2012-1097 (kernel issues) CVE-2012-0884 and CVE-2012-1165 (openssl issues) CVE-2012-0060, CVE-2012-0061, and CVE-2012-0815 (rpm issues) This update also fixes the following bug: * The Hypervisor previously set the lro_disable option for the enic driver. The driver does not support this option, as a result the Hypervisor did not correctly detect and configure the network interfaces of a Cisco M81KR adaptor, when present. The Hypervisor has been updated and no longer sets the invalid option for this driver. (BZ#809463) Users of Red Hat Enterprise Virtualization Hypervisor are advised to upgrade to this updated package, which fixes these issues. Please see https://www.redhat.com/footer/terms-of-use.html Copyright © 2012 Red Hat, Inc. All rights reserved. Important https://rhn.redhat.com/errata/RHSA-2012-0531.html https://rhn.redhat.com/errata/RHSA-2012-0531.html https://access.redhat.com/security/updates/classification/#important https://access.redhat.com/security/updates/classification/#important RHEV Hypervisor for RHEL-6 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. 2012-02-14T00:00:00Z 2010-11-17T00:00:00Z CVE-2012-0864 Moderate 6.8 AV:N/AC:M/AU:N/C:P/I:P/A:P 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 https://rhn.redhat.com/errata/RHSA-2012-0531.html https://www.redhat.com/security/data/cve/CVE-2012-0864.html CVE-2012-0864 https://bugzilla.redhat.com/show_bug.cgi?id=794766 bz#794766: CVE-2012-0864 glibc: FORTIFY_SOURCE format string protection bypass via "nargs" integer overflow A flaw was found in the way libtasn1 decoded DER data. An attacker could create carefully-crafted DER encoded input (such as an X.509 certificate) that, when parsed by an application that uses libtasn1 (such as applications using GnuTLS), could cause the application to crash. 2012-03-19T00:00:00Z 2012-03-19T00:00:00Z CVE-2012-1569 Important 5 AV:N/AC:L/Au:N/C:N/I:N/A:P 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 https://rhn.redhat.com/errata/RHSA-2012-0531.html http://blog.mudynamics.com/2012/03/20/gnutls-and-libtasn1-vulns/ http://blog.mudynamics.com/2012/03/20/gnutls-and-libtasn1-vulns/ https://www.redhat.com/security/data/cve/CVE-2012-1569.html CVE-2012-1569 https://bugzilla.redhat.com/show_bug.cgi?id=804920 bz#804920: CVE-2012-1569 libtasn1: DER decoding buffer overflow (GNUTLS-SA-2012-3, MU-201202-02) Red Hat would like to thank Matthew Hall of Mu Dynamics for reporting this issue. 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. 2012-03-21T00:00:00Z 2012-03-21T00:00:00Z CVE-2012-1573 Important 5 AV:N/AC:L/Au:N/C:N/I:N/A:P 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 https://rhn.redhat.com/errata/RHSA-2012-0531.html http://blog.mudynamics.com/2012/03/20/gnutls-and-libtasn1-vulns/ http://blog.mudynamics.com/2012/03/20/gnutls-and-libtasn1-vulns/ https://www.redhat.com/security/data/cve/CVE-2012-1573.html CVE-2012-1573 https://bugzilla.redhat.com/show_bug.cgi?id=805432 bz#805432: CVE-2012-1573 gnutls: TLS record handling issue (GNUTLS-SA-2012-2, MU-201202-01) Red Hat would like to thank Matthew Hall of Mu Dynamics for reporting this issue.