Bug 1854910 (CVE-2020-11097)

Summary:	CVE-2020-11097 freerdp: out of bounds read in PRIMARY_DRAWING_ORDER_FIELD_BYTES
Product:	[Other] Security Response	Reporter:	Dhananjay Arunesh <darunesh>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	mads, negativo17, oholy, pahan
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	freerdp 2.1.2	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-05-18 20:34:21 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:	1854913, 1854915, 1855907, 1855908
Bug Blocks:	1854906

Description Dhananjay Arunesh 2020-07-08 12:36:48 UTC

In FreeRDP before version 2.1.2, an out of bounds read occurs resulting in accessing a memory location that is outside of the boundaries of the static array PRIMARY_DRAWING_ORDER_FIELD_BYTES. This is fixed in version 2.1.2.

References:
http://www.freerdp.com/2020/06/22/2_1_2-released
https://github.com/FreeRDP/FreeRDP/commit/58a3122250d54de3a944c487776bcd4d1da4721e
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-c8x2-c3c9-9r3f

Comment 1 Dhananjay Arunesh 2020-07-08 12:38:09 UTC

Created freerdp tracking bugs for this issue:

Affects: epel-all [bug 1854915]
Affects: fedora-all [bug 1854913]

Comment 2 Todd Cullum 2020-07-10 22:11:14 UTC

This flaw affects freerdp clients and servers. In winpr/libwinpr/sspi/NTLM/ntlm_av_pairs.c, there is a static array AV_PAIR_STRINGS[] which could be indexed out-of-bounds by routines in the file. The patch uses a getter and sanitization routine to prevent this and modifies the calling functions appropriately.

Comment 4 errata-xmlrpc 2021-05-18 15:34:25 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:1849 https://access.redhat.com/errata/RHSA-2021:1849

Comment 5 Product Security DevOps Team 2021-05-18 20:34:21 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-2020-11097