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Bug 1416704 - (CVE-2017-5618) CVE-2017-5618 screen: Privilege escalation via unsafe logfile handling
CVE-2017-5618 screen: Privilege escalation via unsafe logfile handling
Status: CLOSED NOTABUG
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20170124,repor...
: Security
Depends On:
Blocks: 1416707
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Reported: 2017-01-26 04:49 EST by Andrej Nemec
Modified: 2017-01-30 04:37 EST (History)
4 users (show)

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Last Closed: 2017-01-26 11:43:49 EST
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Description Andrej Nemec 2017-01-26 04:49:40 EST
A vulnerability was found in a way screen handles logfiles. A maliciously crafted logfile could allow the attacker to possibly elevate his privileges to those of root.

References:

https://lists.gnu.org/archive/html/screen-devel/2017-01/msg00025.html
http://seclists.org/oss-sec/2017/q1/184
Comment 1 Cedric Buissart 2017-01-26 11:42:13 EST
The vulnerable code is not present in screen as shipped in Red Hat Enterprise Linux versions 5, 6 and 7.

Also, Red Hat Enterprise Linux versions 5, 6 and 7 are shipped with /usr/bin/screen SGID set to 'screen' group.
Comment 2 Andrej Nemec 2017-01-30 04:37:36 EST
CVE assignment:

http://seclists.org/oss-sec/2017/q1/224

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