Bug 1780558 (CVE-2019-19579) - CVE-2019-19579 xen: an untrusted domain with access to a physical device can DMA into host memory, leading to privilege escalation
Summary: CVE-2019-19579 xen: an untrusted domain with access to a physical device can ...
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2019-19579
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1780559
Blocks: 1791290
TreeView+ depends on / blocked
 
Reported: 2019-12-06 11:43 UTC by Marian Rehak
Modified: 2020-02-18 20:09 UTC (History)
23 users (show)

Fixed In Version:
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Last Closed: 2020-02-18 20:09:36 UTC


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Description Marian Rehak 2019-12-06 11:43:55 UTC
XSA-302 relies on the use of libxl's "assignable-add" feature to prepare devices to be assigned to untrusted guests. However this is not a strictly required step. The PCI passthrough documentation on the wiki describes alternate ways of preparing devices for assignment. Hosts where these methods are used will still leave the system in a vulnerable state after the device comes back from a guest.

Upstream Reference:

http://xenbits.xen.org/xsa/advisory-306.html

Comment 1 Marian Rehak 2019-12-06 11:44:07 UTC
Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1780559]

Comment 2 Product Security DevOps Team 2020-02-18 20:09:36 UTC
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2019-19579


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