Bug 1652127 (CVE-2018-19387)

Summary: CVE-2018-19387 tmux: NULL Pointer Dereference in format_cb_pane_tabs in format.c
Product: [Other] Security Response Reporter: Laura Pardo <lpardo>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED NOTABUG QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: abhgupta, dbaker, dcantrell, jokerman, psampaio, rosset.filipe, sthangav, strobert, sven, trankin
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Fixed In Version: Doc Type: If docs needed, set a value
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Clone Of: Environment:
Last Closed: 2019-06-10 10:43:06 UTC Type: ---
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Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 1652128, 1652952    
Bug Blocks: 1652147    

Description Laura Pardo 2018-11-21 15:51:43 UTC 
A flaw was found in tmux 2.7 through 2.8. The format_cb_pane_tabs function in format.c might allow attackers to cause a denial of service (NULL Pointer Dereference and application crash) by arranging for a malloc failure. 


References: 
https://github.com/tmux/tmux/issues/1547

Upstream Patch: 
https://github.com/openbsd/src/commit/b32e1d34e10a0da806823f57f02a4ae6e93d756e
Comment 1 Laura Pardo 2018-11-21 15:52:12 UTC 
Created tmux tracking bugs for this issue:

Affects: fedora-all [bug 1652128]
Comment 2 Filipe Rosset 2018-11-21 18:01:55 UTC 
great, thanks Laura, I'll fix this issue in a few hours.
Comment 3 Filipe Rosset 2018-11-22 13:06:23 UTC 
Fedora Update System 2018-11-21 21:20:52 EST
tmux-2.8-2.fc27 has been submitted as an update to Fedora 27. https://bodhi.fedoraproject.org/updates/FEDORA-2018-28b19d8c63

Fedora Update System 2018-11-21 21:20:58 EST
tmux-2.8-2.fc28 has been submitted as an update to Fedora 28. https://bodhi.fedoraproject.org/updates/FEDORA-2018-b74b9ac8d1

Fedora Update System 2018-11-21 21:21:03 EST
tmux-2.8-2.fc29 has been submitted as an update to Fedora 29. https://bodhi.fedoraproject.org/updates/FEDORA-2018-e5e93f4c7b
Comment 4 Stefan Cornelius 2018-11-23 16:44:45 UTC 
Upstream disputes the security impact:
https://github.com/tmux/tmux/issues/1547#issuecomment-441228660
Comment 5 Stefan Cornelius 2018-11-23 16:44:54 UTC 
Statement:

This issue did not affect the versions of tmux as shipped with Red Hat Enterprise Linux 7.