Bug 435905 – [feature] add fortification for vasprintf etc

Bug 435905 - [feature] add fortification for vasprintf etc

Summary:	[feature] add fortification for vasprintf etc

Status:	CLOSED RAWHIDE

Aliases:	None

Product:	Fedora
Classification:	Fedora
Component:	glibc (Show other bugs)
Sub Component:
Version:	rawhide
Hardware:	All Linux

Priority	medium Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Jakub Jelinek
QA Contact:	Fedora Extras Quality Assurance
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Reported:	2008-03-04 07:16 EST by Mark J. Cox (Product Security)
Modified:	2008-03-11 05:22 EDT (History)
CC List:	1 user (show)

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Doc Type:	Bug Fix
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Last Closed:	2008-03-11 05:22:25 EDT
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Description Mark J. Cox (Product Security) 2008-03-04 07:16:58 EST

Whilst testing various format string exploits today, the security response team
 noticed that %n in a writable format string was not being captured by
FORTIFY_SOURCE=2 as we expected.  This was because the application was using
vasprintf, a function that hasn't been fortified.  Jakub confirmed this is true
and there is no fortification for asprintf, __asprintf, vasprintf, dprintf,
vdprintf, obstack_printf, obstack_vprint.

Can we get vasprintf fortified in time for F9 at a minimum?

Comment 1 Jakub Jelinek 2008-03-04 11:07:46 EST

http://sources.redhat.com/ml/libc-hacker/2008-03/msg00000.html

Comment 2 Jakub Jelinek 2008-03-11 05:22:25 EDT

Implemented in 2.7.90-8 and above.

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