[Secure-testing-team] Bug#549310: overkill: long player names can corrupt data on the server machine

[Jonathan Neuschäfer]

Package: overkill
Version: 0.16-14
Severity: grave
Tags: patch security
Justification: user security hole

Players with names longer than 24 characters have been able to corrupt data on the machine where the server is run. This is made possible by not always checking wether the name of a connecting player is too long. I have made a patch to fix this.


-- System Information:
Debian Release: squeeze/sid
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: i386 (i686)

Kernel: Linux 2.6.30-1-686 (SMP w/1 CPU core)
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages overkill depends on:
ii  libc6                         2.9-27     GNU C Library: Shared libraries
ii  libx11-6                      2:1.2.2-1  X11 client-side library
ii  libxpm4                       1:3.5.7-2  X11 pixmap library

overkill recommends no packages.

overkill suggests no packages.

-- no debconf information
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> 	int name_too_long;
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> 	name_too_long=strlen(name)>MAX_NAME_LEN? 1:0;
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< 	cp->member.name=mem_alloc(strlen(name)+1);
---
> 	cp->member.name=mem_alloc((name_too_long?MAX_NAME_LEN:strlen(name))+1);
> 	if (name_too_long) *(cp->member.name+MAX_NAME_LEN)='\0';
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< 	memcpy(cp->member.name,name,strlen(name)+1);
---
> 	memcpy(cp->member.name,name,(name_too_long?MAX_NAME_LEN:strlen(name)));