Bug 1188779
| Summary: | authentication over mod_dbd fails when MALLOC_CHECK_ not set | ||||||||
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| Product: | Red Hat Enterprise Linux 7 | Reporter: | Martin Frodl <mfrodl> | ||||||
| Component: | httpd | Assignee: | Luboš Uhliarik <luhliari> | ||||||
| Status: | CLOSED ERRATA | QA Contact: | Martin Frodl <mfrodl> | ||||||
| Severity: | unspecified | Docs Contact: | |||||||
| Priority: | unspecified | ||||||||
| Version: | 7.1 | CC: | isenfeld, jkaluza, jorton | ||||||
| Target Milestone: | rc | ||||||||
| Target Release: | --- | ||||||||
| Hardware: | Unspecified | ||||||||
| OS: | Unspecified | ||||||||
| Whiteboard: | |||||||||
| 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.
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Story Points: | --- | ||||||
| Clone Of: | Environment: | ||||||||
| Last Closed: | 2015-11-19 04:37:23 UTC | Type: | Bug | ||||||
| Regression: | --- | Mount Type: | --- | ||||||
| Documentation: | --- | CRM: | |||||||
| Verified Versions: | Category: | --- | |||||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||||
| Embargoed: | |||||||||
| Attachments: |
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That could be fixed by attached patch. I will propose it upstream. Created attachment 988086 [details]
proposed patch
Sent upstream: http://svn.apache.org/r1663647 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 |
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