Sendmail 5.61 dumps core if username > 8 chars

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Article #19

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#19

From: Andrew Macpherson
Date: Sun, 29 Oct 1989 22:51

33 lines
1412 bytes

Description:
	If the value returned by "getlogin" does not match your passwd
	entry, (it has been truncated for instance), one will
	de-reference a null pointer in "username".  This results in a
	segmentation violation on a SUN
Repeat-By:
	Arrange to log in as "postmaster", attempt to send mail
Fix:
	Apply this patch.

Index: conf.c
Prereq: 5.17
*** conf.oc	Sun Oct 29 22:18:28 1989
--- conf.c	Sun Oct 29 22:23:32 1989
***************
*** 229,236 ****
  		else
  		{
  
! 			pw = getpwnam(myname);
! 			if(getuid() != pw->pw_uid)
  			{
  				pw = getpwuid(getuid());
  				if (pw != NULL)
--- 229,236 ----
  		else
  		{
  
! 			if((pw = getpwnam(myname)) == NULL
! 			   || (getuid() != pw->pw_uid))
  			{
  				pw = getpwuid(getuid());
  				if (pw != NULL)

Technical Details

Message-ID: <8910292251.15263@stl.stc.co.uk>

Path:

arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!gem.mps.ohio-state.edu!samsung!ginosko!uunet!mcsun!ukc!edcastle!cs.glasgow.ac.uk!daemon

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!gem.mps.ohio-state.edu!samsung!ginosko!uunet!mcsun!ukc!edcastle!cs.glasgow.ac.uk!daemon
From: andrew@stl.stc.co.uk (Andrew Macpherson)
Newsgroups: mail.uk-sendmail-workers,comp.mail.sendmail
Subject: Sendmail 5.61 dumps core if username > 8 chars
Message-ID: <8910292251.15263@stl.stc.co.uk>
Date: 29 Oct 89 22:51:12 GMT
Sender: daemon@cs.glasgow.ac.uk
Lines: 33
Approved: usenet@cs.glasgow.ac.uk
Index:   lib/sendmail/conf.c 4.3BSD
Apparently-To: uk-sendmail-workers%cs.hw.ac.uk@uk.ac.ukc
Apparently-To: 4bsd-bugs@edu.berkeley