rhsa-2012_1235
Vulnerability from csaf_redhat
Published
2012-09-05 16:43
Modified
2024-11-22 05:47
Summary
Red Hat Security Advisory: kvm security update
Notes
Topic
Updated kvm packages that fix one security issue 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.
Details
KVM (Kernel-based Virtual Machine) is a full virtualization solution for
Linux on AMD64 and Intel 64 systems. KVM is a Linux kernel module built
for the standard Red Hat Enterprise Linux kernel.
A flaw was found in the way QEMU handled VT100 terminal escape sequences
when emulating certain character devices. A guest user with privileges to
write to a character device that is emulated on the host using a virtual
console back-end could use this flaw to crash the qemu-kvm process on the
host or, possibly, escalate their privileges on the host. (CVE-2012-3515)
This flaw did not affect the default use of KVM. Affected configurations
were:
* When guests were started from the command line ("/usr/libexec/qemu-kvm"),
and without specifying a serial or parallel device that specifically does
not use a virtual console (vc) back-end. (Note that Red Hat does not
support invoking "qemu-kvm" from the command line on Red Hat Enterprise
Linux 5.)
* Guests that were managed via libvirt, such as when using Virtual Machine
Manager (virt-manager), but that have a serial or parallel device that uses
a virtual console back-end. By default, guests managed via libvirt will not
use a virtual console back-end for such devices.
Red Hat would like to thank the Xen project for reporting this issue.
All KVM users should upgrade to these updated packages, which correct this
issue. Note: The procedure in the Solution section must be performed before
this update will take effect.
Terms of Use
This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
{ "document": { "aggregate_severity": { "namespace": "https://access.redhat.com/security/updates/classification/", "text": "Important" }, "category": "csaf_security_advisory", "csaf_version": "2.0", "distribution": { "text": "Copyright \u00a9 Red Hat, Inc. All rights reserved.", "tlp": { "label": "WHITE", "url": "https://www.first.org/tlp/" } }, "lang": "en", "notes": [ { "category": "summary", "text": "Updated kvm packages that fix one security issue are now available for\nRed Hat Enterprise Linux 5.\n\nThe Red Hat Security Response Team has rated this update as having\nimportant security impact. A Common Vulnerability Scoring System (CVSS)\nbase score, which gives a detailed severity rating, is available from the\nCVE link in the References section.", "title": "Topic" }, { "category": "general", "text": "KVM (Kernel-based Virtual Machine) is a full virtualization solution for\nLinux on AMD64 and Intel 64 systems. KVM is a Linux kernel module built\nfor the standard Red Hat Enterprise Linux kernel.\n\nA flaw was found in the way QEMU handled VT100 terminal escape sequences\nwhen emulating certain character devices. A guest user with privileges to\nwrite to a character device that is emulated on the host using a virtual\nconsole back-end could use this flaw to crash the qemu-kvm process on the\nhost or, possibly, escalate their privileges on the host. (CVE-2012-3515)\n\nThis flaw did not affect the default use of KVM. Affected configurations\nwere:\n\n* When guests were started from the command line (\"/usr/libexec/qemu-kvm\"),\nand without specifying a serial or parallel device that specifically does\nnot use a virtual console (vc) back-end. (Note that Red Hat does not\nsupport invoking \"qemu-kvm\" from the command line on Red Hat Enterprise\nLinux 5.)\n\n* Guests that were managed via libvirt, such as when using Virtual Machine\nManager (virt-manager), but that have a serial or parallel device that uses\na virtual console back-end. By default, guests managed via libvirt will not\nuse a virtual console back-end for such devices.\n\nRed Hat would like to thank the Xen project for reporting this issue.\n\nAll KVM users should upgrade to these updated packages, which correct this\nissue. Note: The procedure in the Solution section must be performed before\nthis update will take effect.", "title": "Details" }, { "category": "legal_disclaimer", "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.", "title": "Terms of Use" } ], "publisher": { "category": "vendor", "contact_details": "https://access.redhat.com/security/team/contact/", "issuing_authority": "Red Hat Product Security is responsible for vulnerability handling across all Red Hat products and services.", "name": "Red Hat Product Security", "namespace": "https://www.redhat.com" }, "references": [ { "category": "self", "summary": "https://access.redhat.com/errata/RHSA-2012:1235", "url": "https://access.redhat.com/errata/RHSA-2012:1235" }, { "category": "external", "summary": "https://access.redhat.com/security/updates/classification/#important", "url": "https://access.redhat.com/security/updates/classification/#important" }, { "category": "external", "summary": "851252", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=851252" }, { "category": "self", "summary": "Canonical URL", "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2012/rhsa-2012_1235.json" } ], "title": "Red Hat Security Advisory: kvm security update", "tracking": { "current_release_date": "2024-11-22T05:47:19+00:00", "generator": { "date": "2024-11-22T05:47:19+00:00", "engine": { "name": "Red Hat SDEngine", "version": "4.2.1" } }, "id": "RHSA-2012:1235", "initial_release_date": "2012-09-05T16:43:00+00:00", "revision_history": [ { "date": "2012-09-05T16:43:00+00:00", "number": "1", "summary": "Initial version" }, { "date": "2012-09-05T16:45:53+00:00", "number": "2", "summary": "Last updated version" }, { "date": "2024-11-22T05:47:19+00:00", "number": "3", "summary": "Last generated version" } ], "status": "final", "version": "3" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_name", "name": "RHEL Desktop Multi OS (v. 5 client)", "product": { "name": "RHEL Desktop Multi OS (v. 5 client)", "product_id": "5Client-VT-5.8.Z", "product_identification_helper": { "cpe": "cpe:/a:redhat:rhel_virtualization:5::client" } } }, { "category": "product_name", "name": "RHEL Virtualization (v. 5 server)", "product": { "name": "RHEL Virtualization (v. 5 server)", "product_id": "5Server-VT-5.8.Z", "product_identification_helper": { "cpe": "cpe:/a:redhat:rhel_virtualization:5::server" } } } ], "category": "product_family", "name": "Red Hat Enterprise Linux" }, { "branches": [ { "category": "product_version", "name": "kvm-debuginfo-0:83-249.el5_8.5.x86_64", "product": { "name": "kvm-debuginfo-0:83-249.el5_8.5.x86_64", "product_id": "kvm-debuginfo-0:83-249.el5_8.5.x86_64", "product_identification_helper": { "purl": "pkg:rpm/redhat/kvm-debuginfo@83-249.el5_8.5?arch=x86_64" } } }, { "category": "product_version", "name": "kvm-0:83-249.el5_8.5.x86_64", "product": { "name": "kvm-0:83-249.el5_8.5.x86_64", "product_id": "kvm-0:83-249.el5_8.5.x86_64", "product_identification_helper": { "purl": "pkg:rpm/redhat/kvm@83-249.el5_8.5?arch=x86_64" } } }, { "category": "product_version", "name": "kmod-kvm-0:83-249.el5_8.5.x86_64", "product": { "name": "kmod-kvm-0:83-249.el5_8.5.x86_64", "product_id": "kmod-kvm-0:83-249.el5_8.5.x86_64", "product_identification_helper": { "purl": "pkg:rpm/redhat/kmod-kvm@83-249.el5_8.5?arch=x86_64" } } }, { "category": "product_version", "name": "kmod-kvm-debug-0:83-249.el5_8.5.x86_64", "product": { "name": "kmod-kvm-debug-0:83-249.el5_8.5.x86_64", "product_id": "kmod-kvm-debug-0:83-249.el5_8.5.x86_64", "product_identification_helper": { "purl": "pkg:rpm/redhat/kmod-kvm-debug@83-249.el5_8.5?arch=x86_64" } } }, { "category": "product_version", "name": "kvm-qemu-img-0:83-249.el5_8.5.x86_64", "product": { "name": "kvm-qemu-img-0:83-249.el5_8.5.x86_64", "product_id": "kvm-qemu-img-0:83-249.el5_8.5.x86_64", "product_identification_helper": { "purl": "pkg:rpm/redhat/kvm-qemu-img@83-249.el5_8.5?arch=x86_64" } } }, { "category": "product_version", "name": "kvm-tools-0:83-249.el5_8.5.x86_64", "product": { "name": "kvm-tools-0:83-249.el5_8.5.x86_64", "product_id": "kvm-tools-0:83-249.el5_8.5.x86_64", "product_identification_helper": { "purl": "pkg:rpm/redhat/kvm-tools@83-249.el5_8.5?arch=x86_64" } } } ], "category": "architecture", "name": "x86_64" }, { "branches": [ { "category": "product_version", "name": "kvm-0:83-249.el5_8.5.src", "product": { "name": "kvm-0:83-249.el5_8.5.src", "product_id": "kvm-0:83-249.el5_8.5.src", "product_identification_helper": { "purl": "pkg:rpm/redhat/kvm@83-249.el5_8.5?arch=src" } } } ], "category": "architecture", "name": "src" } ], "category": "vendor", "name": "Red Hat" } ], "relationships": [ { "category": "default_component_of", "full_product_name": { "name": "kmod-kvm-0:83-249.el5_8.5.x86_64 as a component of RHEL Desktop Multi OS (v. 5 client)", "product_id": "5Client-VT-5.8.Z:kmod-kvm-0:83-249.el5_8.5.x86_64" }, "product_reference": "kmod-kvm-0:83-249.el5_8.5.x86_64", "relates_to_product_reference": "5Client-VT-5.8.Z" }, { "category": "default_component_of", "full_product_name": { "name": "kmod-kvm-debug-0:83-249.el5_8.5.x86_64 as a component of RHEL Desktop Multi OS (v. 5 client)", "product_id": "5Client-VT-5.8.Z:kmod-kvm-debug-0:83-249.el5_8.5.x86_64" }, "product_reference": "kmod-kvm-debug-0:83-249.el5_8.5.x86_64", "relates_to_product_reference": "5Client-VT-5.8.Z" }, { "category": "default_component_of", "full_product_name": { "name": "kvm-0:83-249.el5_8.5.src as a component of RHEL Desktop Multi OS (v. 5 client)", "product_id": "5Client-VT-5.8.Z:kvm-0:83-249.el5_8.5.src" }, "product_reference": "kvm-0:83-249.el5_8.5.src", "relates_to_product_reference": "5Client-VT-5.8.Z" }, { "category": "default_component_of", "full_product_name": { "name": "kvm-0:83-249.el5_8.5.x86_64 as a component of RHEL Desktop Multi OS (v. 5 client)", "product_id": "5Client-VT-5.8.Z:kvm-0:83-249.el5_8.5.x86_64" }, "product_reference": "kvm-0:83-249.el5_8.5.x86_64", "relates_to_product_reference": "5Client-VT-5.8.Z" }, { "category": "default_component_of", "full_product_name": { "name": "kvm-debuginfo-0:83-249.el5_8.5.x86_64 as a component of RHEL Desktop Multi OS (v. 5 client)", "product_id": "5Client-VT-5.8.Z:kvm-debuginfo-0:83-249.el5_8.5.x86_64" }, "product_reference": "kvm-debuginfo-0:83-249.el5_8.5.x86_64", "relates_to_product_reference": "5Client-VT-5.8.Z" }, { "category": "default_component_of", "full_product_name": { "name": "kvm-qemu-img-0:83-249.el5_8.5.x86_64 as a component of RHEL Desktop Multi OS (v. 5 client)", "product_id": "5Client-VT-5.8.Z:kvm-qemu-img-0:83-249.el5_8.5.x86_64" }, "product_reference": "kvm-qemu-img-0:83-249.el5_8.5.x86_64", "relates_to_product_reference": "5Client-VT-5.8.Z" }, { "category": "default_component_of", "full_product_name": { "name": "kvm-tools-0:83-249.el5_8.5.x86_64 as a component of RHEL Desktop Multi OS (v. 5 client)", "product_id": "5Client-VT-5.8.Z:kvm-tools-0:83-249.el5_8.5.x86_64" }, "product_reference": "kvm-tools-0:83-249.el5_8.5.x86_64", "relates_to_product_reference": "5Client-VT-5.8.Z" }, { "category": "default_component_of", "full_product_name": { "name": "kmod-kvm-0:83-249.el5_8.5.x86_64 as a component of RHEL Virtualization (v. 5 server)", "product_id": "5Server-VT-5.8.Z:kmod-kvm-0:83-249.el5_8.5.x86_64" }, "product_reference": "kmod-kvm-0:83-249.el5_8.5.x86_64", "relates_to_product_reference": "5Server-VT-5.8.Z" }, { "category": "default_component_of", "full_product_name": { "name": "kmod-kvm-debug-0:83-249.el5_8.5.x86_64 as a component of RHEL Virtualization (v. 5 server)", "product_id": "5Server-VT-5.8.Z:kmod-kvm-debug-0:83-249.el5_8.5.x86_64" }, "product_reference": "kmod-kvm-debug-0:83-249.el5_8.5.x86_64", "relates_to_product_reference": "5Server-VT-5.8.Z" }, { "category": "default_component_of", "full_product_name": { "name": "kvm-0:83-249.el5_8.5.src as a component of RHEL Virtualization (v. 5 server)", "product_id": "5Server-VT-5.8.Z:kvm-0:83-249.el5_8.5.src" }, "product_reference": "kvm-0:83-249.el5_8.5.src", "relates_to_product_reference": "5Server-VT-5.8.Z" }, { "category": "default_component_of", "full_product_name": { "name": "kvm-0:83-249.el5_8.5.x86_64 as a component of RHEL Virtualization (v. 5 server)", "product_id": "5Server-VT-5.8.Z:kvm-0:83-249.el5_8.5.x86_64" }, "product_reference": "kvm-0:83-249.el5_8.5.x86_64", "relates_to_product_reference": "5Server-VT-5.8.Z" }, { "category": "default_component_of", "full_product_name": { "name": "kvm-debuginfo-0:83-249.el5_8.5.x86_64 as a component of RHEL Virtualization (v. 5 server)", "product_id": "5Server-VT-5.8.Z:kvm-debuginfo-0:83-249.el5_8.5.x86_64" }, "product_reference": "kvm-debuginfo-0:83-249.el5_8.5.x86_64", "relates_to_product_reference": "5Server-VT-5.8.Z" }, { "category": "default_component_of", "full_product_name": { "name": "kvm-qemu-img-0:83-249.el5_8.5.x86_64 as a component of RHEL Virtualization (v. 5 server)", "product_id": "5Server-VT-5.8.Z:kvm-qemu-img-0:83-249.el5_8.5.x86_64" }, "product_reference": "kvm-qemu-img-0:83-249.el5_8.5.x86_64", "relates_to_product_reference": "5Server-VT-5.8.Z" }, { "category": "default_component_of", "full_product_name": { "name": "kvm-tools-0:83-249.el5_8.5.x86_64 as a component of RHEL Virtualization (v. 5 server)", "product_id": "5Server-VT-5.8.Z:kvm-tools-0:83-249.el5_8.5.x86_64" }, "product_reference": "kvm-tools-0:83-249.el5_8.5.x86_64", "relates_to_product_reference": "5Server-VT-5.8.Z" } ] }, "vulnerabilities": [ { "acknowledgments": [ { "names": [ "Xen project" ] } ], "cve": "CVE-2012-3515", "cwe": { "id": "CWE-119", "name": "Improper Restriction of Operations within the Bounds of a Memory Buffer" }, "discovery_date": "2012-08-23T00:00:00+00:00", "ids": [ { "system_name": "Red Hat Bugzilla ID", "text": "851252" } ], "notes": [ { "category": "description", "text": "Qemu, as used in Xen 4.0, 4.1 and possibly other products, when emulating certain devices with a virtual console backend, allows local OS guest users to gain privileges via a crafted escape VT100 sequence that triggers the overwrite of a \"device model\u0027s address space.\"", "title": "Vulnerability description" }, { "category": "summary", "text": "qemu: VT100 emulation vulnerability", "title": "Vulnerability summary" }, { "category": "other", "text": "This issue did affect the versions of xen package as shipped with Red Hat\nEnterprise Linux 5.\n\nThis issue did affect the versions of kvm package as shipped with Red Hat\nEnterprise Linux 5.\n\nThis issue did affect the versions of qemu-kvm package as shipped with Red Hat\nEnterprise Linux 6.", "title": "Statement" }, { "category": "general", "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.", "title": "CVSS score applicability" } ], "product_status": { "fixed": [ "5Client-VT-5.8.Z:kmod-kvm-0:83-249.el5_8.5.x86_64", "5Client-VT-5.8.Z:kmod-kvm-debug-0:83-249.el5_8.5.x86_64", "5Client-VT-5.8.Z:kvm-0:83-249.el5_8.5.src", "5Client-VT-5.8.Z:kvm-0:83-249.el5_8.5.x86_64", "5Client-VT-5.8.Z:kvm-debuginfo-0:83-249.el5_8.5.x86_64", "5Client-VT-5.8.Z:kvm-qemu-img-0:83-249.el5_8.5.x86_64", "5Client-VT-5.8.Z:kvm-tools-0:83-249.el5_8.5.x86_64", "5Server-VT-5.8.Z:kmod-kvm-0:83-249.el5_8.5.x86_64", "5Server-VT-5.8.Z:kmod-kvm-debug-0:83-249.el5_8.5.x86_64", "5Server-VT-5.8.Z:kvm-0:83-249.el5_8.5.src", "5Server-VT-5.8.Z:kvm-0:83-249.el5_8.5.x86_64", "5Server-VT-5.8.Z:kvm-debuginfo-0:83-249.el5_8.5.x86_64", "5Server-VT-5.8.Z:kvm-qemu-img-0:83-249.el5_8.5.x86_64", "5Server-VT-5.8.Z:kvm-tools-0:83-249.el5_8.5.x86_64" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://access.redhat.com/security/cve/CVE-2012-3515" }, { "category": "external", "summary": "RHBZ#851252", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=851252" }, { "category": "external", "summary": "https://www.cve.org/CVERecord?id=CVE-2012-3515", "url": "https://www.cve.org/CVERecord?id=CVE-2012-3515" }, { "category": "external", "summary": "https://nvd.nist.gov/vuln/detail/CVE-2012-3515", "url": "https://nvd.nist.gov/vuln/detail/CVE-2012-3515" } ], "release_date": "2012-09-05T00:00:00+00:00", "remediations": [ { "category": "vendor_fix", "date": "2012-09-05T16:43:00+00:00", "details": "Before applying this update, make sure all previously-released errata\nrelevant to your system have been applied.\n\nThis update is available via the Red Hat Network. Details on how to\nuse the Red Hat Network to apply this update are available at\nhttps://access.redhat.com/knowledge/articles/11258\n\nThe following procedure must be performed before this update will take\neffect:\n\n1) Stop all KVM guest virtual machines.\n\n2) Either reboot the hypervisor machine or, as the root user, remove (using\n\"modprobe -r [module]\") and reload (using \"modprobe [module]\") all of the\nfollowing modules which are currently running (determined using \"lsmod\"):\nkvm, ksm, kvm-intel or kvm-amd.\n\n3) Restart the KVM guest virtual machines.", "product_ids": [ "5Client-VT-5.8.Z:kmod-kvm-0:83-249.el5_8.5.x86_64", "5Client-VT-5.8.Z:kmod-kvm-debug-0:83-249.el5_8.5.x86_64", "5Client-VT-5.8.Z:kvm-0:83-249.el5_8.5.src", "5Client-VT-5.8.Z:kvm-0:83-249.el5_8.5.x86_64", "5Client-VT-5.8.Z:kvm-debuginfo-0:83-249.el5_8.5.x86_64", "5Client-VT-5.8.Z:kvm-qemu-img-0:83-249.el5_8.5.x86_64", "5Client-VT-5.8.Z:kvm-tools-0:83-249.el5_8.5.x86_64", "5Server-VT-5.8.Z:kmod-kvm-0:83-249.el5_8.5.x86_64", "5Server-VT-5.8.Z:kmod-kvm-debug-0:83-249.el5_8.5.x86_64", "5Server-VT-5.8.Z:kvm-0:83-249.el5_8.5.src", "5Server-VT-5.8.Z:kvm-0:83-249.el5_8.5.x86_64", "5Server-VT-5.8.Z:kvm-debuginfo-0:83-249.el5_8.5.x86_64", "5Server-VT-5.8.Z:kvm-qemu-img-0:83-249.el5_8.5.x86_64", "5Server-VT-5.8.Z:kvm-tools-0:83-249.el5_8.5.x86_64" ], "restart_required": { "category": "none" }, "url": "https://access.redhat.com/errata/RHSA-2012:1235" } ], "scores": [ { "cvss_v2": { "accessComplexity": "MEDIUM", "accessVector": "ADJACENT_NETWORK", "authentication": "SINGLE", "availabilityImpact": "COMPLETE", "baseScore": 7.4, "confidentialityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "vectorString": "AV:A/AC:M/Au:S/C:C/I:C/A:C", "version": "2.0" }, "products": [ "5Client-VT-5.8.Z:kmod-kvm-0:83-249.el5_8.5.x86_64", "5Client-VT-5.8.Z:kmod-kvm-debug-0:83-249.el5_8.5.x86_64", "5Client-VT-5.8.Z:kvm-0:83-249.el5_8.5.src", "5Client-VT-5.8.Z:kvm-0:83-249.el5_8.5.x86_64", "5Client-VT-5.8.Z:kvm-debuginfo-0:83-249.el5_8.5.x86_64", "5Client-VT-5.8.Z:kvm-qemu-img-0:83-249.el5_8.5.x86_64", "5Client-VT-5.8.Z:kvm-tools-0:83-249.el5_8.5.x86_64", "5Server-VT-5.8.Z:kmod-kvm-0:83-249.el5_8.5.x86_64", "5Server-VT-5.8.Z:kmod-kvm-debug-0:83-249.el5_8.5.x86_64", "5Server-VT-5.8.Z:kvm-0:83-249.el5_8.5.src", "5Server-VT-5.8.Z:kvm-0:83-249.el5_8.5.x86_64", "5Server-VT-5.8.Z:kvm-debuginfo-0:83-249.el5_8.5.x86_64", "5Server-VT-5.8.Z:kvm-qemu-img-0:83-249.el5_8.5.x86_64", "5Server-VT-5.8.Z:kvm-tools-0:83-249.el5_8.5.x86_64" ] } ], "threats": [ { "category": "impact", "details": "Important" } ], "title": "qemu: VT100 emulation vulnerability" } ] }
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Sightings
Author | Source | Type | Date |
---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.