[asterisk-bugs] [Asterisk 0016407]: [patch] potential buffer overflow in say_date_with_format()

[Asterisk Bug Tracker]

The following issue has been ASSIGNED. 
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https://issues.asterisk.org/view.php?id=16407 
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Reported By:                qwell
Assigned To:                tilghman
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Project:                    Asterisk
Issue ID:                   16407
Category:                   Core/General
Reproducibility:            have not tried
Severity:                   crash
Priority:                   low
Status:                     assigned
Asterisk Version:           SVN 
JIRA:                       SWP-505 
Regression:                 No 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
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Date Submitted:             2009-12-07 15:40 CST
Last Modified:              2010-01-04 15:45 CST
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Summary:                    [patch] potential buffer overflow in
say_date_with_format()
Description: 
An improper (or crafted) format string can cause a buffer overflow in
say_date_with_format().

Inside the ast_say_date_with_format_LANG() functions (all of them appear
to have the same bug - yay copy/paste?), there is a for loop that iterates
over format.  If format contains only one apostrophe, the inner loop can
loop beyond the end of format.


I believe that inner loop should be checking bounds with format[offset +
1].
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 (0116013) svnbot (reporter) - 2010-01-04 15:45
 https://issues.asterisk.org/view.php?id=16407#c116013 
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Repository: asterisk
Revision: 237573

U   branches/1.4/main/say.c

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r237573 | tilghman | 2010-01-04 15:45:47 -0600 (Mon, 04 Jan 2010) | 6
lines

Bounds checking for input string
(closes issue https://issues.asterisk.org/view.php?id=16407)
 Reported by: qwell
 Patches: 
       20100104__issue16407.diff.txt uploaded by tilghman (license 14)

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http://svn.digium.com/view/asterisk?view=rev&revision=237573 

Issue History 
Date Modified    Username       Field                    Change               
====================================================================== 
2010-01-04 15:45 svnbot         Checkin                                      
2010-01-04 15:45 svnbot         Note Added: 0116013                          
2010-01-04 15:45 svnbot         Status                   ready for testing =>
assigned
2010-01-04 15:45 svnbot         Assigned To               => tilghman        
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