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Bug 1406703 - (CVE-2016-10027) CVE-2016-10027 smack: TLS SecurityMode.required bypass via StripTLS attack
CVE-2016-10027 smack: TLS SecurityMode.required bypass via StripTLS attack
Status: NEW
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=20161112,repor...
: Security
Depends On: 1406704
Blocks: 1406706
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Reported: 2016-12-21 04:41 EST by Andrej Nemec
Modified: 2018-05-10 14:19 EDT (History)
22 users (show)

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Fixed In Version: smack 4.1.9
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Description Andrej Nemec 2016-12-21 04:41:57 EST 

A vulnerability in the Smack XMPP library was reported where the security of
the TLS connection is not always enforced. By stripping the "starttls"
feature from the server response with a man-in-the-middle tool, an attacker
can force the client to authenticate in clear text even if the
"SecurityMode.required" TLS setting has been set.

References:

http://seclists.org/oss-sec/2016/q4/716
https://community.igniterealtime.org/blogs/ignite/2016/11/22/smack-security-advisory-2016-11-22

Upstream bug:

https://issues.igniterealtime.org/browse/SMACK-739

Upstream patches:

https://github.com/igniterealtime/Smack/commit/059ee99ba0d5ff7758829acf5a9aeede09ec820b
https://github.com/igniterealtime/Smack/commit/a9d5cd4a611f47123f9561bc5a81a4555fe7cb04
Comment 1 Andrej Nemec 2016-12-21 04:44:12 EST 
Created smack tracking bugs for this issue:

Affects: fedora-all [bug 1406704]
Comment 3 Andrej Nemec 2016-12-23 02:41:10 EST 
CVE assignment:

http://seclists.org/oss-sec/2016/q4/739
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