Bug 1516759 (CVE-2017-16927) - CVE-2017-16927 xrdp: Buffer-overflow in scp_v0s_accept function in session manager
Summary: CVE-2017-16927 xrdp: Buffer-overflow in scp_v0s_accept function in session ma...
Status: NEW
Alias: CVE-2017-16927
Product: Security Response
Classification: Other
Component: vulnerability   
(Show other bugs)
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
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Whiteboard: impact=moderate,public=20171121,repor...
Keywords: Security
Depends On: 1516760 1516761
Blocks:
TreeView+ depends on / blocked
 
Reported: 2017-11-23 11:11 UTC by Andrej Nemec
Modified: 2017-11-23 11:11 UTC (History)
2 users (show)

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Description Andrej Nemec 2017-11-23 11:11:14 UTC
The scp_v0s_accept function in sesman/libscp/libscp_v0.c in the session manager in xrdp through 0.9.4 uses an untrusted integer as a write length, which allows local users to cause a denial of service (buffer overflow and application crash) or possibly have unspecified other impact via a crafted input stream.

Upstream patch:

https://github.com/neutrinolabs/xrdp/pull/958/commits/ebd0510a7d4dab906b6e01570205dfa530d1f7bf

References:

https://groups.google.com/forum/#!topic/xrdp-devel/PmVfMuy_xBA

Comment 1 Andrej Nemec 2017-11-23 11:11:58 UTC
Created xrdp tracking bugs for this issue:

Affects: epel-all [bug 1516760]
Affects: fedora-all [bug 1516761]


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