UBUNTU-CVE-2019-19580

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Source
https://ubuntu.com/security/notices/UBUNTU-CVE-2019-19580
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-19580.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2019-19580
Related
Published
2019-12-11T18:16:00Z
Modified
2019-12-11T18:16:00Z
Severity
  • 6.6 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

An issue was discovered in Xen through 4.12.x allowing x86 PV guest OS users to gain host OS privileges by leveraging race conditions in pagetable promotion and demotion operations, because of an incomplete fix for CVE-2019-18421. XSA-299 addressed several critical issues in restartable PV type change operations. Despite extensive testing and auditing, some corner cases were missed. A malicious PV guest administrator may be able to escalate their privilege to that of the host. All security-supported versions of Xen are vulnerable. Only x86 systems are affected. Arm systems are not affected. Only x86 PV guests can leverage the vulnerability. x86 HVM and PVH guests cannot leverage the vulnerability. Note that these attacks require very precise timing, which may be difficult to exploit in practice.

References

Affected packages

Ubuntu:Pro:16.04:LTS / xen

Package

Name
xen

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

4.*

4.5.1-0ubuntu1
4.5.1-0ubuntu2
4.6.0-1ubuntu1
4.6.0-1ubuntu2
4.6.0-1ubuntu4
4.6.0-1ubuntu4.1
4.6.0-1ubuntu4.2
4.6.0-1ubuntu4.3
4.6.5-0ubuntu1
4.6.5-0ubuntu1.1
4.6.5-0ubuntu1.2
4.6.5-0ubuntu1.4

Ecosystem specific 

{
    "ubuntu_priority": "medium"
}

Ubuntu:Pro:18.04:LTS / xen

Package

Name
xen

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

4.*

4.9.0-0ubuntu3
4.9.0-0ubuntu4
4.9.2-0ubuntu1

Ecosystem specific 

{
    "ubuntu_priority": "medium"
}

Ubuntu:20.04:LTS / xen

Package

Name
xen
Purl
pkg:deb/ubuntu/xen@4.11.3+24-g14b62ab3e5-1ubuntu1?arch=src?distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.11.3+24-g14b62ab3e5-1ubuntu1

Affected versions

4.*

4.9.2-0ubuntu2
4.9.2-0ubuntu6
4.9.2-0ubuntu7

Ecosystem specific 

{
    "availability": "No subscription required",
    "ubuntu_priority": "medium",
    "binaries": [
        {
            "xen-doc": "4.11.3+24-g14b62ab3e5-1ubuntu1",
            "libxengnttab1": "4.11.3+24-g14b62ab3e5-1ubuntu1",
            "libxendevicemodel1-dbgsym": "4.11.3+24-g14b62ab3e5-1ubuntu1",
            "xen-hypervisor-4.11-armhf": "4.11.3+24-g14b62ab3e5-1ubuntu1",
            "xen-hypervisor-4.9-armhf": "4.11.3+24-g14b62ab3e5-1ubuntu1",
            "libxenevtchn1-dbgsym": "4.11.3+24-g14b62ab3e5-1ubuntu1",
            "libxentoolcore1-dbgsym": "4.11.3+24-g14b62ab3e5-1ubuntu1",
            "libxentoollog1-dbgsym": "4.11.3+24-g14b62ab3e5-1ubuntu1",
            "xen-hypervisor-common": "4.11.3+24-g14b62ab3e5-1ubuntu1",
            "xen-hypervisor-4.9-arm64": "4.11.3+24-g14b62ab3e5-1ubuntu1",
            "libxenforeignmemory1": "4.11.3+24-g14b62ab3e5-1ubuntu1",
            "libxencall1": "4.11.3+24-g14b62ab3e5-1ubuntu1",
            "xen-utils-common-dbgsym": "4.11.3+24-g14b62ab3e5-1ubuntu1",
            "xen-utils-4.11-dbgsym": "4.11.3+24-g14b62ab3e5-1ubuntu1",
            "libxenmisc4.11-dbgsym": "4.11.3+24-g14b62ab3e5-1ubuntu1",
            "xen-system-arm64": "4.11.3+24-g14b62ab3e5-1ubuntu1",
            "xenstore-utils-dbgsym": "4.11.3+24-g14b62ab3e5-1ubuntu1",
            "libxenstore3.0": "4.11.3+24-g14b62ab3e5-1ubuntu1",
            "xen-hypervisor-4.11-arm64": "4.11.3+24-g14b62ab3e5-1ubuntu1",
            "libxengnttab1-dbgsym": "4.11.3+24-g14b62ab3e5-1ubuntu1",
            "libxenstore3.0-dbgsym": "4.11.3+24-g14b62ab3e5-1ubuntu1",
            "xen-hypervisor-4.9-amd64": "4.11.3+24-g14b62ab3e5-1ubuntu1",
            "libxenforeignmemory1-dbgsym": "4.11.3+24-g14b62ab3e5-1ubuntu1",
            "libxendevicemodel1": "4.11.3+24-g14b62ab3e5-1ubuntu1",
            "libxen-dev": "4.11.3+24-g14b62ab3e5-1ubuntu1",
            "xen-system-amd64": "4.11.3+24-g14b62ab3e5-1ubuntu1",
            "libxentoolcore1": "4.11.3+24-g14b62ab3e5-1ubuntu1",
            "libxencall1-dbgsym": "4.11.3+24-g14b62ab3e5-1ubuntu1",
            "xenstore-utils": "4.11.3+24-g14b62ab3e5-1ubuntu1",
            "libxenevtchn1": "4.11.3+24-g14b62ab3e5-1ubuntu1",
            "xen-utils-common": "4.11.3+24-g14b62ab3e5-1ubuntu1",
            "xen-system-armhf": "4.11.3+24-g14b62ab3e5-1ubuntu1",
            "libxentoollog1": "4.11.3+24-g14b62ab3e5-1ubuntu1",
            "xen-hypervisor-4.11-amd64": "4.11.3+24-g14b62ab3e5-1ubuntu1",
            "xen-utils-4.11": "4.11.3+24-g14b62ab3e5-1ubuntu1",
            "libxenmisc4.11": "4.11.3+24-g14b62ab3e5-1ubuntu1"
        }
    ]
}