PT-2017-2435 · Xen+1 · Xen+1
Jan Beulich
·
Publicado
2017-07-05
·
Atualizado
2019-10-03
·
CVE-2017-10920
CVSS v3.1
10
Crítica
| Vetor | AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Xen versions prior to 4.9
Description
The issue is related to insufficient access control for GNTMAP device map and GNTMAP host map, specifically when GNTMAP host map is in unmapping mode. This can be exploited by a remote attacker to cause a denial of service, such as memory corruption, or to gain privileged access to the host. The grant-table feature mishandles mapping, leading to potential count mismanagement and memory corruption, allowing guest OS users to cause issues or obtain host OS access.
Recommendations
For Xen versions prior to 4.9, update to version 4.9 or later to resolve the issue.
As a temporary workaround, consider restricting access to the grant-table feature to minimize the risk of exploitation.
Correção
DoS
Buffer Overflow
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Identificadores relacionados
Produtos afetados
Suse
Xen