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Bug 1188779 - authentication over mod_dbd fails when MALLOC_CHECK_ not set
Summary: authentication over mod_dbd fails when MALLOC_CHECK_ not set
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: httpd
Version: 7.1
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: rc
: ---
Assignee: Luboš Uhliarik
QA Contact: Martin Frodl
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2015-02-03 17:00 UTC by Martin Frodl
Modified: 2021-01-14 09:33 UTC (History)
3 users (show)

Fixed In Version: httpd-2.4.6-32.el7
Doc Type: Bug Fix
Doc Text:
Cause: When using mod_authn_dbd with PostgreSQL, the password obtained from database has been used after it was freed already. Consequence: In the mentioned configuration, httpd process could crash resulting in authentication fail. Fix: The user-after-free bug in mod_authn_dbd has been fixed. Result: mod_dbd_authn does not crash in the mentioned case and authentication works.
Clone Of:
Environment:
Last Closed: 2015-11-19 04:37:23 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)
Reproducer (10.00 KB, application/x-tar)
2015-02-03 17:00 UTC, Martin Frodl 		no flags Details
proposed patch (885 bytes, patch)
2015-02-04 13:25 UTC, Jan Kaluža 		no flags Details | Diff
View All


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2015:2194 0 normal SHIPPED_LIVE httpd bug fix and enhancement update 2015-11-19 08:05:27 UTC

Description Martin Frodl 2015-02-03 17:00:33 UTC 
Created attachment 987697 [details]
Reproducer

Description of problem:

When Apache is configured to authenticate over mod_dbd using a PostgreSQL database, the authentication attempts fail if the variable MALLOC_CHECK_ is not set (to a non-zero value) in /etc/sysconfig/httpd. When a line like 'MALLOC_CHECK_=2' is added to the file and httpd restarted, the authentication succeeds.

Steps to reproduce:
Extract the enclosed tarball and run reproducer.sh.

Version-Release number of selected component (if applicable):
httpd-2.4.6-31.el7
Comment 4 Jan Kaluža 2015-02-04 13:24:51 UTC 
That could be fixed by attached patch. I will propose it upstream.
Comment 5 Jan Kaluža 2015-02-04 13:25:22 UTC 
Created attachment 988086 [details]
proposed patch
Comment 6 Jan Kaluža 2015-03-03 11:16:33 UTC 
Sent upstream: http://svn.apache.org/r1663647
Comment 12 errata-xmlrpc 2015-11-19 04:37:23 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2015-2194.html
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