csaf_redhat - rhsa-2012

rhsa-2012_1130

Vulnerability from csaf_redhat

Published

2012-07-31 18:39

Modified

2024-11-22 05:35

Summary

Red Hat Security Advisory: xen security update

Notes

Topic

Updated xen 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 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.

Details

The xen packages contain administration tools and the xend service for managing the kernel-xen kernel for virtualization on Red Hat Enterprise Linux. A flaw was found in the way the pyGrub boot loader handled compressed kernel images. A privileged guest user in a para-virtualized guest (a DomU) could use this flaw to create a crafted kernel image that, when attempting to boot it, could result in an out-of-memory condition in the privileged domain (the Dom0). (CVE-2012-2625) Red Hat would like to thank Xinli Niu for reporting this issue. All users of xen are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. After installing the updated packages, the xend service must be restarted for this update to take effect.

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.

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        "text": "Updated xen 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 moderate\nsecurity impact. A Common Vulnerability Scoring System (CVSS) base score,\nwhich gives a detailed severity rating, is available from the CVE link in\nthe References section.",
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        "text": "The xen packages contain administration tools and the xend service for\nmanaging the kernel-xen kernel for virtualization on Red Hat Enterprise\nLinux.\n\nA flaw was found in the way the pyGrub boot loader handled compressed\nkernel images. A privileged guest user in a para-virtualized guest (a DomU)\ncould use this flaw to create a crafted kernel image that, when attempting\nto boot it, could result in an out-of-memory condition in the privileged\ndomain (the Dom0). (CVE-2012-2625)\n\nRed Hat would like to thank Xinli Niu for reporting this issue.\n\nAll users of xen are advised to upgrade to these updated packages, which\ncontain a backported patch to correct this issue. After installing the\nupdated packages, the xend service must be restarted for this update to\ntake effect.",
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          "title": "Vulnerability summary"
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          "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.",
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          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2012-2625"
        },
        {
          "category": "external",
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          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=821676"
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      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "xen: pv bootloader doesn\u0027t check the size of the bzip2 or lzma compressed kernel"
    }
  ]
}

cve-2012-2625

Vulnerability from cvelistv5

Published

2012-10-31 16:00

Modified

2024-08-06 19:42

Severity ?

Summary

The PyGrub boot loader in Xen unstable before changeset 25589:60f09d1ab1fe, 4.2.x, and 4.1.x allows local para-virtualized guest users to cause a denial of service (memory consumption) via a large (1) bzip2 or (2) lzma compressed kernel image.

References

▼	URL	Tags
	http://www.openwall.com/lists/oss-security/2012/10/26/3	mailing-list, x_refsource_MLIST
	http://rhn.redhat.com/errata/RHSA-2012-1130.html	vendor-advisory, x_refsource_REDHAT
	http://secunia.com/advisories/51413	third-party-advisory, x_refsource_SECUNIA
	http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1817	x_refsource_MISC
	http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00005.html	vendor-advisory, x_refsource_SUSE
	http://lists.opensuse.org/opensuse-security-announce/2012-08/msg00025.html	vendor-advisory, x_refsource_SUSE
	http://www.securityfocus.com/bid/53650	vdb-entry, x_refsource_BID
	http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00017.html	vendor-advisory, x_refsource_SUSE
	http://www.securitytracker.com/id?1027090	vdb-entry, x_refsource_SECTRACK
	http://lists.opensuse.org/opensuse-security-announce/2012-08/msg00024.html	vendor-advisory, x_refsource_SUSE
	http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00018.html	vendor-advisory, x_refsource_SUSE
	http://xenbits.xensource.com/hg/xen-unstable.hg/rev/60f09d1ab1fe	x_refsource_CONFIRM
	http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00018.html	vendor-advisory, x_refsource_SUSE
	http://secunia.com/advisories/49184	third-party-advisory, x_refsource_SECUNIA
	http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00017.html	vendor-advisory, x_refsource_SUSE

Impacted products

Vendor

Product

Version

▼

n/a

Version: n/a

Show details on NVD website

JSON

To clipboard

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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.

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