CVE-2020-11743
CVE-2020-11743
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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 GNTTABOP_map_grant. 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.
CVSS 5.5 · Medium · EPSS 0.5% · Fix available
- Published
- Updated
Stack: system
Affected products and versions
n/a
- Versions
- n/a: Affected
No fix published
xen Debian:12
- Affected ranges
- ECOSYSTEM: < 4.11.4-1
Update to 4.11.4-1
xen Debian:13
- Affected ranges
- ECOSYSTEM: < 4.11.4-1
Update to 4.11.4-1
xen Debian:14
- Affected ranges
- ECOSYSTEM: < 4.11.4-1
Update to 4.11.4-1
xen Ubuntu:16.04:LTS
- Versions
- 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
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
xen Ubuntu:18.04:LTS
- Versions
- 4.9.0-0ubuntu3
- 4.9.0-0ubuntu4
- 4.9.2-0ubuntu1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
xen Ubuntu:20.04:LTS
- Versions
- 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
- Affected ranges
- ECOSYSTEM: < 4.11.3+24-g14b62ab3e5-1ubuntu2.3
Update to 4.11.3+24-g14b62ab3e5-1ubuntu2.3
Original sources
- https://xenbits.xen.org/xsa/advisory-316.html
- http://xenbits.xen.org/xsa/advisory-316.html
- http://www.openwall.com/lists/oss-security/2020/04/14/3
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YMAW7D2MP6RE4BFI5BZWOBBWGY3VSOFN/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5M2XRNCHOGGTJQBZQJ7DCV6ZNAKN3LE2/
- http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00006.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NVTP4OYHCTRU3ONFJOFJQVNDFB25KLLG/
- https://security.gentoo.org/glsa/202005-08
- https://www.debian.org/security/2020/dsa-4723
- https://nvd.nist.gov/vuln/detail/CVE-2020-11743