Bug 1854910 (CVE-2020-11097) - CVE-2020-11097 freerdp: out of bounds read in PRIMARY_DRAWING_ORDER_FIELD_BYTES
Summary: CVE-2020-11097 freerdp: out of bounds read in PRIMARY_DRAWING_ORDER_FIELD_BYTES
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2020-11097
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: 1854915 1854913 1855907 1855908
Blocks: 1854906
TreeView+ depends on / blocked
 
Reported: 2020-07-08 12:36 UTC by Dhananjay Arunesh
Modified: 2021-05-18 20:34 UTC (History)
4 users (show)

Fixed In Version: freerdp 2.1.2
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Clone Of:
Environment:
Last Closed: 2021-05-18 20:34:21 UTC


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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


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