UBUNTU-CVE-2020-11743
- Source
- https://ubuntu.com/security/CVE-2020-11743
- Import Source
- https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-11743.json
- JSON Data
- https://api.osv.dev/v1/vulns/UBUNTU-CVE-2020-11743
- Related
- Published
- 2020-04-14T13:15:00Z
- Modified
- 2025-01-13T10:22:11Z
- Severity
-
- 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
An issue was discovered in Xen through 4.13.x, allowing guest OS users to cause a denial of service because of a bad error path in GNTTABOPmapgrant. Grant table operations are expected to return 0 for success, and a negative number for errors. Some misplaced brackets cause one error path to return 1 instead of a negative value. The grant table code in Linux treats this condition as success, and proceeds with incorrectly initialised state. A buggy or malicious guest can construct its grant table in such a way that, when a backend domain tries to map a grant, it hits the incorrect error path. This will crash a Linux based dom0 or backend domain.
- References
Affected packages
Ubuntu:Pro:16.04:LTS / xen
Package
- Name
- xen
- Purl
- pkg:deb/ubuntu/xen@4.6.5-0ubuntu1.4?arch=source&distro=esm-infra/xenial
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affected
Ubuntu:Pro:18.04:LTS / xen
Package
- Name
- xen
- Purl
- pkg:deb/ubuntu/xen@4.9.2-0ubuntu1?arch=source&distro=esm-infra/bionic
Ubuntu:20.04:LTS / xen
Package
- Name
- xen
- Purl
- pkg:deb/ubuntu/xen@4.11.3+24-g14b62ab3e5-1ubuntu2.3?arch=source&distro=focal
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affectedFixed4.11.3+24-g14b62ab3e5-1ubuntu2.3
Affected versions
4.*
4.9.2-0ubuntu2
4.9.2-0ubuntu6
4.9.2-0ubuntu7
4.11.3+24-g14b62ab3e5-1ubuntu1
4.11.3+24-g14b62ab3e5-1ubuntu2
4.11.3+24-g14b62ab3e5-1ubuntu2.2
Ecosystem specific
{
"binaries": [
{
"binary_name": "libxen-dev",
"binary_version": "4.11.3+24-g14b62ab3e5-1ubuntu2.3"
},
{
"binary_name": "libxencall1",
"binary_version": "4.11.3+24-g14b62ab3e5-1ubuntu2.3"
},
{
"binary_name": "libxencall1-dbgsym",
"binary_version": "4.11.3+24-g14b62ab3e5-1ubuntu2.3"
},
{
"binary_name": "libxendevicemodel1",
"binary_version": "4.11.3+24-g14b62ab3e5-1ubuntu2.3"
},
{
"binary_name": "libxendevicemodel1-dbgsym",
"binary_version": "4.11.3+24-g14b62ab3e5-1ubuntu2.3"
},
{
"binary_name": "libxenevtchn1",
"binary_version": "4.11.3+24-g14b62ab3e5-1ubuntu2.3"
},
{
"binary_name": "libxenevtchn1-dbgsym",
"binary_version": "4.11.3+24-g14b62ab3e5-1ubuntu2.3"
},
{
"binary_name": "libxenforeignmemory1",
"binary_version": "4.11.3+24-g14b62ab3e5-1ubuntu2.3"
},
{
"binary_name": "libxenforeignmemory1-dbgsym",
"binary_version": "4.11.3+24-g14b62ab3e5-1ubuntu2.3"
},
{
"binary_name": "libxengnttab1",
"binary_version": "4.11.3+24-g14b62ab3e5-1ubuntu2.3"
},
{
"binary_name": "libxengnttab1-dbgsym",
"binary_version": "4.11.3+24-g14b62ab3e5-1ubuntu2.3"
},
{
"binary_name": "libxenmisc4.11",
"binary_version": "4.11.3+24-g14b62ab3e5-1ubuntu2.3"
},
{
"binary_name": "libxenmisc4.11-dbgsym",
"binary_version": "4.11.3+24-g14b62ab3e5-1ubuntu2.3"
},
{
"binary_name": "libxenstore3.0",
"binary_version": "4.11.3+24-g14b62ab3e5-1ubuntu2.3"
},
{
"binary_name": "libxenstore3.0-dbgsym",
"binary_version": "4.11.3+24-g14b62ab3e5-1ubuntu2.3"
},
{
"binary_name": "libxentoolcore1",
"binary_version": "4.11.3+24-g14b62ab3e5-1ubuntu2.3"
},
{
"binary_name": "libxentoolcore1-dbgsym",
"binary_version": "4.11.3+24-g14b62ab3e5-1ubuntu2.3"
},
{
"binary_name": "libxentoollog1",
"binary_version": "4.11.3+24-g14b62ab3e5-1ubuntu2.3"
},
{
"binary_name": "libxentoollog1-dbgsym",
"binary_version": "4.11.3+24-g14b62ab3e5-1ubuntu2.3"
},
{
"binary_name": "xen-doc",
"binary_version": "4.11.3+24-g14b62ab3e5-1ubuntu2.3"
},
{
"binary_name": "xen-hypervisor-4.11-amd64",
"binary_version": "4.11.3+24-g14b62ab3e5-1ubuntu2.3"
},
{
"binary_name": "xen-hypervisor-4.11-arm64",
"binary_version": "4.11.3+24-g14b62ab3e5-1ubuntu2.3"
},
{
"binary_name": "xen-hypervisor-4.11-armhf",
"binary_version": "4.11.3+24-g14b62ab3e5-1ubuntu2.3"
},
{
"binary_name": "xen-hypervisor-4.9-amd64",
"binary_version": "4.11.3+24-g14b62ab3e5-1ubuntu2.3"
},
{
"binary_name": "xen-hypervisor-4.9-arm64",
"binary_version": "4.11.3+24-g14b62ab3e5-1ubuntu2.3"
},
{
"binary_name": "xen-hypervisor-4.9-armhf",
"binary_version": "4.11.3+24-g14b62ab3e5-1ubuntu2.3"
},
{
"binary_name": "xen-hypervisor-common",
"binary_version": "4.11.3+24-g14b62ab3e5-1ubuntu2.3"
},
{
"binary_name": "xen-system-amd64",
"binary_version": "4.11.3+24-g14b62ab3e5-1ubuntu2.3"
},
{
"binary_name": "xen-system-arm64",
"binary_version": "4.11.3+24-g14b62ab3e5-1ubuntu2.3"
},
{
"binary_name": "xen-system-armhf",
"binary_version": "4.11.3+24-g14b62ab3e5-1ubuntu2.3"
},
{
"binary_name": "xen-utils-4.11",
"binary_version": "4.11.3+24-g14b62ab3e5-1ubuntu2.3"
},
{
"binary_name": "xen-utils-4.11-dbgsym",
"binary_version": "4.11.3+24-g14b62ab3e5-1ubuntu2.3"
},
{
"binary_name": "xen-utils-common",
"binary_version": "4.11.3+24-g14b62ab3e5-1ubuntu2.3"
},
{
"binary_name": "xen-utils-common-dbgsym",
"binary_version": "4.11.3+24-g14b62ab3e5-1ubuntu2.3"
},
{
"binary_name": "xenstore-utils",
"binary_version": "4.11.3+24-g14b62ab3e5-1ubuntu2.3"
},
{
"binary_name": "xenstore-utils-dbgsym",
"binary_version": "4.11.3+24-g14b62ab3e5-1ubuntu2.3"
}
],
"availability": "No subscription required",
"ubuntu_priority": "medium"
}