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Bug 1548422 - xemacs: Missing ASLR
Summary: xemacs: Missing ASLR
Keywords:
Status: CLOSED WONTFIX
Alias: None
Product: Fedora
Classification: Fedora
Component: xemacs
Version: 29
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
Assignee: Jerry James
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks: Fedora28BuildFlags
TreeView+ depends on / blocked
 
Reported: 2018-02-23 13:10 UTC by Florian Weimer
Modified: 2018-11-22 22:52 UTC (History)
2 users (show)

Fixed In Version:
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Clone Of:
Environment:
Last Closed: 2018-11-22 22:52:32 UTC
Type: Bug
Embargoed:

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Description Florian Weimer 2018-02-23 13:10:04 UTC 
The xemacs program is currently built as a position-dependent executable (i.e., not PIE), which means no address space layout randomization (ASLR) hardening.

I wonder if it possible to use the portable dumper and enable full ASLR.
Comment 1 Jerry James 2018-02-23 14:51:23 UTC 
I know that ASLR breaks some XEmacs configurations, but I'm not certain if it breaks all of them.  I will experiment this weekend and see if something can be done.
Comment 2 Jerry James 2018-02-26 03:09:31 UTC 
ASLR conflicts with the techniques XEmacs uses to build both the portable dumper and the garbage collector.  Enabling ASLR would require architectural changes that are unlikely to happen now, given that upstream is very nearly dead.  While I am technically part of upstream myself, I never worked on either the dumper or the garbage collector, so am unfamiliar with that code.

I think we have to leave hardening disabled on this package for it to function.
Comment 3 Jan Kurik 2018-08-14 11:08:11 UTC 
This bug appears to have been reported against 'rawhide' during the Fedora 29 development cycle.
Changing version to '29'.
Comment 4 Jerry James 2018-11-22 22:52:32 UTC 
I do not believe there is anything that can be done about this (with a reasonable amount of effort anyway), so I am closing this bug.
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