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Bug 1390526 - (CVE-2016-0762) CVE-2016-0762 tomcat: timing attack in Realm implementation
CVE-2016-0762 tomcat: timing attack in Realm implementation
Status: NEW
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=20161027,reported=2...
: Security
Depends On: 1390531 1390532 1390533 1393227 1393228
Blocks: 1376651 1390534 1415638 1428325
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Reported: 2016-11-01 06:05 EDT by Martin Prpič
Modified: 2018-05-10 14:48 EDT (History)
71 users (show)

See Also:
Fixed In Version: tomcat 6.0.47, tomcat 7.0.72, tomcat 8.5.5, tomcat 8.0.37
Doc Type: If docs needed, set a value
Doc Text:
The Realm implementations did not process the supplied password if the supplied user name did not exist. This made a timing attack possible to determine valid user names. Note that the default configuration includes the LockOutRealm which makes exploitation of this vulnerability harder.
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RHEL 7.3 requirements from Atomic Host:
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External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2017:0455 normal SHIPPED_LIVE Important: Red Hat JBoss Web Server 3.1.0 security and enhancement update 2017-03-07 19:06:40 EST
Red Hat Product Errata RHSA-2017:0456 normal SHIPPED_LIVE Important: Red Hat JBoss Web Server 3.1.0 security and enhancement update 2017-03-07 19:06:06 EST
Red Hat Product Errata RHSA-2017:0457 normal SHIPPED_LIVE Important: Red Hat JBoss Web Server security and enhancement update 2017-03-07 19:05:59 EST
Red Hat Product Errata RHSA-2017:2247 normal SHIPPED_LIVE Low: tomcat security, bug fix, and enhancement update 2017-08-01 15:43:19 EDT

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Description Martin Prpič 2016-11-01 06:05:46 EDT 
The following flaw was found in Tomcat:

The Realm implementations did not process the supplied password if the supplied user name did not exist. This made a timing attack possible to determine valid user names. Note that the default configuration includes the LockOutRealm which makes exploitation of this vulnerability harder.

Upstream patches:

6.0.47: https://svn.apache.org/viewvc?view=revision&revision=1758506
7.0.72: https://svn.apache.org/viewvc?view=revision&revision=1758502
8.5.5: https://svn.apache.org/viewvc?view=revision&revision=1758500
8.0.37: https://svn.apache.org/viewvc?view=revision&revision=1758501

External References:

https://tomcat.apache.org/security-6.html#Fixed_in_Apache_Tomcat_6.0.47
https://tomcat.apache.org/security-7.html#Fixed_in_Apache_Tomcat_7.0.72
https://tomcat.apache.org/security-8.html#Fixed_in_Apache_Tomcat_8.5.5_and_8.0.37
Comment 2 Martin Prpič 2016-11-01 06:25:06 EDT 
Created tomcat tracking bugs for this issue:

Affects: fedora-all [bug 1390532]
Affects: epel-6 [bug 1390533]
Comment 6 errata-xmlrpc 2017-03-07 14:09:57 EST 
This issue has been addressed in the following products:

  Red Hat JBoss Web Server 3.1.0

Via RHSA-2017:0457 https://rhn.redhat.com/errata/RHSA-2017-0457.html
Comment 7 errata-xmlrpc 2017-03-07 14:14:30 EST 
This issue has been addressed in the following products:

  Red Hat JBoss Web Server 3 for RHEL 7

Via RHSA-2017:0456 https://access.redhat.com/errata/RHSA-2017:0456
Comment 8 errata-xmlrpc 2017-03-07 14:19:02 EST 
This issue has been addressed in the following products:

  Red Hat JBoss Web Server 3 for RHEL 6

Via RHSA-2017:0455 https://access.redhat.com/errata/RHSA-2017:0455
Comment 9 errata-xmlrpc 2017-08-01 19:20:15 EDT 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:2247 https://access.redhat.com/errata/RHSA-2017:2247
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