Bug 343341

Summary:	net-mail/vpopmail _FORTIFY_SOURCE indicates presence of overflow
Product:	Gentoo Linux	Reporter:	Diego Elio Pettenò (RETIRED) <flameeyes>
Component:	Current packages	Assignee:	Qmail Team (OBSOLETE) <qmail-bugs+disabled>
Status:	RESOLVED FIXED
Severity:	major	CC:	hardened
Priority:	High
Version:	unspecified
Hardware:	All
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---
Bug Depends on:
Bug Blocks:	259417
Attachments:	Build log

Description Diego Elio Pettenò (RETIRED) gentoo-dev

2010-10-30 09:32:49 UTC

You're receiving this bug because the package in Summary has produced _FORTIFY_SOURCE related warnings indicating the presence of a sure overflow in a static buffer.

Even though this is not always an indication of a security problem it might even be. So please check this out ASAP.

By the way, _FORTIFY_SOURCE is disabled when you disable optimisation, so don't try finding out the cause using -O0.

Thanks,
Your friendly neighborhood tinderboxer

Comment 1 Diego Elio Pettenò (RETIRED) gentoo-dev

2010-10-30 09:33:01 UTC

Created attachment 252563 [details]
Build log

Comment 2 Kevin Pyle 2010-10-31 00:06:48 UTC

This is a typical case of using a magic constant as the snprintf length argument instead of using sizeof to let the compiler insert the proper length.  The offending calls in vlistlib.c can be fixed by doing:

sed -e 's/\(snprintf(\s*\(LI->[a-zA-Z_]\+\),\s*\)[a-zA-Z_]\+,/\1 sizeof(\2),/'

Comment 3 Robin Johnson archtester

2013-05-30 23:21:21 UTC

InCVS