Bug 1332912 - glibc: nss_hesiod: Heap overflow in get_txt_records
Summary: glibc: nss_hesiod: Heap overflow in get_txt_records
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Fedora
Classification: Fedora
Component: glibc
Version: rawhide
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
Assignee: Florian Weimer
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2016-05-04 10:58 UTC by Florian Weimer
Modified: 2016-05-15 04:52 UTC (History)
9 users (show)

Fixed In Version: glibc-2.22-15.fc23, glibc-2.23.1-7.fc24
Clone Of:
Environment:
Last Closed: 2016-05-15 04:52:59 UTC
Type: Bug
Embargoed:

Attachments (Terms of Use)


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System ID Private Priority Status Summary Last Updated
Sourceware 20031 0 None None None 2016-05-04 10:58:40 UTC

Description Florian Weimer 2016-05-04 10:58:40 UTC 
When a completely empty TXT record is received (which is not a valid DNS resource record, nss_hesiod allocates a zero-sized object, and then writes a NUL terminator to it.

No trust boundary is cross, so this is not a security issue, just a regular bug.
Comment 1 Fedora Update System 2016-05-07 17:19:21 UTC 
glibc-2.22-15.fc23 has been submitted as an update to Fedora 23. https://bodhi.fedoraproject.org/updates/FEDORA-2016-68abc0be35
Comment 2 Fedora Update System 2016-05-08 16:25:21 UTC 
glibc-2.22-15.fc23 has been pushed to the Fedora 23 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2016-68abc0be35
Comment 3 Florian Weimer 2016-05-09 09:19:49 UTC 
Fixed with this new 2.23 backport:

commit 4c4b3cbb4638ec19de19c167d498e30fd67501ab
Author: Florian Weimer <fweimer>
Date:   Mon May 2 16:04:32 2016 +0200

    hesiod: Avoid heap overflow in get_txt_records [BZ #20031]
    
    (cherry picked from commit 8a03ccbb77f52ec4b55062eeedddb8daec1a33e4)
Comment 4 Fedora Update System 2016-05-09 14:56:59 UTC 
glibc-2.23.1-6.fc24 has been submitted as an update to Fedora 24. https://bodhi.fedoraproject.org/updates/FEDORA-2016-b321728d74
Comment 5 Fedora Update System 2016-05-10 17:57:27 UTC 
glibc-2.22-15.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.
Comment 6 Fedora Update System 2016-05-10 20:30:15 UTC 
glibc-2.23.1-6.fc24 has been pushed to the Fedora 24 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2016-b321728d74
Comment 7 Fedora Update System 2016-05-11 13:55:25 UTC 
glibc-2.23.1-7.fc24 has been submitted as an update to Fedora 24. https://bodhi.fedoraproject.org/updates/FEDORA-2016-b321728d74
Comment 8 Fedora Update System 2016-05-12 09:44:10 UTC 
glibc-2.23.1-7.fc24 has been pushed to the Fedora 24 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2016-b321728d74
Comment 9 Fedora Update System 2016-05-14 23:30:06 UTC 
glibc-2.23.1-7.fc24 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report.
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