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Bug 1358622 - (CVE-2016-6251) REJECTED CVE-2016-6251 shadow-utils: Potentially unsafe use of getlogin
REJECTED CVE-2016-6251 shadow-utils: Potentially unsafe use of getlogin
Status: CLOSED NOTABUG
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
low Severity low
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Assigned To: Red Hat Product Security
impact=low,public=20160719,reported=2...
: Security
Depends On: 1358629
Blocks: 1358628
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Reported: 2016-07-21 03:42 EDT by Andrej Nemec
Modified: 2017-02-17 10:11 EST (History)
3 users (show)

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Last Closed: 2016-07-21 05:01:30 EDT
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Description Andrej Nemec 2016-07-21 03:42:57 EDT 
A vulnerability was found in shadow-utils. Function getlogin() relies on utmp, which is not a trusted base of information.

References:

http://seclists.org/oss-sec/2016/q3/111

CVE assignment:

http://seclists.org/oss-sec/2016/q3/115
Comment 1 Andrej Nemec 2016-07-21 04:00:42 EDT 
Created shadow-utils tracking bugs for this issue:

Affects: fedora-all [bug 1358629]
Comment 2 Tomas Mraz 2016-07-21 04:40:49 EDT 
No, the use of getlogin in shadow-utils is safe (it is used only to diferentiate the user if there are multiple users with the same uid -> same privileges anyway).
See this post which I agree with:
http://seclists.org/oss-sec/2016/q3/120
Comment 3 Andrej Nemec 2016-07-21 05:01:30 EDT 
(In reply to Tomas Mraz from comment #2)
> No, the use of getlogin in shadow-utils is safe (it is used only to
> diferentiate the user if there are multiple users with the same uid -> same
> privileges anyway).
> See this post which I agree with:
> http://seclists.org/oss-sec/2016/q3/120

I agree too, closing this as notabug. Thanks for confirmation!
Comment 4 Andrej Nemec 2016-07-25 08:36:15 EDT 
Upstream bug:

https://github.com/shadow-maint/shadow/issues/28
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