Bug 1905652 (CVE-2020-29486) - CVE-2020-29486 xen: oxenstored: node ownership can be changed by unprivileged clients (XSA-352)
Summary: CVE-2020-29486 xen: oxenstored: node ownership can be changed by unprivileged...
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2020-29486
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: 1908003
Blocks: 1903644
TreeView+ depends on / blocked
 
Reported: 2020-12-08 18:33 UTC by Guilherme de Almeida Suckevicz
Modified: 2021-02-16 18:45 UTC (History)
4 users (show)

Fixed In Version:
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Environment:
Last Closed: 2020-12-15 22:19:55 UTC


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Description Guilherme de Almeida Suckevicz 2020-12-08 18:33:43 UTC
Nodes in xenstore have an ownership.  In oxenstored, a owner could
give a node away.  But node ownership has quota implications.

Any guest can run another guest out of quota, or create an unbounded
number of nodes owned by dom0, thus running xenstored out of memory.

Comment 1 Guilherme de Almeida Suckevicz 2020-12-15 16:29:53 UTC
External References:

https://www.openwall.com/lists/oss-security/2020/12/15/12

Comment 2 Guilherme de Almeida Suckevicz 2020-12-15 16:30:09 UTC
Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1908003]

Comment 3 Product Security DevOps Team 2020-12-15 22:19:55 UTC
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.


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