Bug 1823911 (CVE-2020-11740)

Summary:	CVE-2020-11740 xen: xenoprof issue allows guest OS users without active profiling to obtain sensitive information about other guests (XSA-313)
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	acaringi, ailan, bhu, brdeoliv, dhoward, drjones, dvlasenk, fhrbata, hkrzesin, imammedo, jforbes, jshortt, jstancek, knoel, m.a.young, mrezanin, nmurray, pbonzini, robinlee.sysu, rvrbovsk, vkuznets, xen-maint
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in xenoprof in Xen through versions 4.13.x. Unprivileged guests can request to map xenoprof buffers, even if profiling has not been enabled for those guests to obtain sensitive information about other guests. The highest threat from this vulnerability is to data confidentiality.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-04-16 15:47:14 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1823912
Bug Blocks:	1823917

Description Guilherme de Almeida Suckevicz 2020-04-14 19:11:20 UTC

An issue was discovered in xenoprof in Xen through 4.13.x, allowing guest OS users (without active profiling) to obtain sensitive information about other guests. Unprivileged guests can request to map xenoprof buffers, even if profiling has not been enabled for those guests. These buffers were not scrubbed.

Reference:
https://xenbits.xen.org/xsa/advisory-313.html

Comment 1 Guilherme de Almeida Suckevicz 2020-04-14 19:11:40 UTC

Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1823912]